Description:FORM 2
THE PATENTS ACT, 1970
(39 of 1970)
&
THE PATENTS RULES, 2003
COMPLETE SPECIFICATION
(Section 10 and Rule 13)

1. TITLE OF THE INVENTION:
CERAMIC LINER INSERTER

2. APPLICANT:
Meril Healthcare Pvt. Ltd., an Indian company of the Survey No. 135/139, Bilakhia House, Muktanand Marg, Chala, Vapi- 396191, Gujarat, India.

The following specification particularly describes the invention and the manner in which it is to be performed:
FIELD OF INVENTION
[001] The present disclosure relates to a medical device. More particularly, the present disclosure relates to a medical device used for implantation of a hip joint prosthesis.
BACKGROUND OF INVENTION
[002] A hip joint prosthesis includes an acetabular component. The acetabular component includes a shell (or an acetabular cup) and a liner. The acetabular cup and the liner are usually substantially hemispherical. The liner allows smooth movement of a head part of the hip joint prosthesis within the acetabular cup. During a surgery to implant the hip joint prosthesis, the acetabular cup is installed in the acetabulum of a patient and then the liner is inserted into the acetabular cup. It is important that when the liner is inserted into the acetabular cup, the liner is aligned correctly with respect to the acetabular cup. Misalignment of the liner with respect to the acetabular cup can lead to a number of problems including a fracture in the liner during the insertion.
[003] Devices are available that assist in inserting the liner into the acetabular cup. These devices are typically mounted on the liner itself prior to positioning the liner over the acetabular cup for insertion. Some devices of this kind only allow for initial alignment of the liner with respect to the acetabular cup prior to the insertion. However, these devices are prone to tilting of the liner as it is inserted into the acetabular cup, leading to misalignment.
[004] Thus, there arises a need for a device or a ceramic liner inserter that overcomes the problems associated with the conventional liner insertion devices.
SUMMARY OF INVENTION
[005] Particular embodiments of the present disclosure are described herein below with reference to the accompanying drawings; however, it is to be understood that the disclosed embodiments are mere examples of the disclosure, which may be embodied in various forms. Well-known functions or constructions are not described in detail to avoid obscuring the present disclosure in unnecessary detail. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present disclosure in virtually any appropriately detailed structure.
[006] The present disclosure relates to a ceramic liner inserter. In an embodiment, the ceramic liner inserter includes a connecting rod having a proximal end and a distal end. The ceramic liner inserter also includes a pusher coupled to the connecting rod at the distal end of the connecting rod and having a distal end configured to contact an inner surface of a ceramic liner. The pusher is configured to push the ceramic liner into an acetabular cup in response to application of force via the connecting rod. The ceramic liner inserter further includes a gripper provided at the distal end of the connecting rod. The gripper is configured to engage an outer surface of the ceramic liner and, in response to the gripper contacting the acetabular cup, move in a proximal direction thereby releasing the ceramic liner into the acetabular cup.
BRIEF DESCRIPTION OF DRAWINGS
[007] The summary above, as well as the following detailed description of illustrative embodiments, is better understood when read in conjunction with the apportioned drawings. For the purpose of illustrating the present disclosure, exemplary constructions of the disclosure are shown in the drawings. However, the disclosure is not limited to specific methods and instrumentality disclosed herein. Moreover, those in the art will understand that the drawings are not to scale.
[008] FIG. 1 depicts a ceramic liner inserter 100, according to an embodiment of the present disclosure.
[009] FIG. 1A depicts attachment of a connecting rod 101 of the ceramic liner inserter 100 with a pusher 107, according to an embodiment of the present disclosure.
[0010] FIG. 1B depicts various components of the ceramic liner inserter 100, according to an embodiment of the present disclosure.
[0011] FIG. 1C depicts a view of a deployment stage of the ceramic liner inserter 100, according to an embodiment of the present disclosure.
[0012] FIG. 2 shows a ceramic liner inserter 200, according to an embodiment of the present disclosure.
[0013] FIG. 2A depicts attachment of a connecting rod 201 of the ceramic liner inserter 200 with a pusher 209, according to an embodiment of the present disclosure.
[0014] FIG. 2B shows a coupling of the connecting rod 201 with a housing 205, according to an embodiment of the present disclosure.
[0015] FIG. 2C depicts various components of the ceramic liner inserter 200, according to an embodiment of the present disclosure.
[0016] FIG. 2C1 shows various components of a housing 205 of the ceramic liner inserter 200, according to an embodiment of the present disclosure.
[0017] FIG. 2C2 depicts a gripper 207 of the ceramic liner inserter 200, according to an embodiment of the present disclosure.
[0018] FIG. 2C3 shows attachment of a central portion 207a with the various parts of the housing 205 of the ceramic liner inserter 200, according to an embodiment of the present disclosure.
[0019] FIG. 2C4 shows a link 211 of the ceramic liner inserter 200, according to an embodiment of the present disclosure.
[0020] FIG. 2C5 shows components of a link ring 217 of the ceramic liner inserter 200, according to an embodiment of the present disclosure.
[0021] FIG. 2D depicts a view of a deployment stage of the ceramic liner inserter 200, according to an embodiment of the present disclosure.
[0022] FIG. 3 depicts a ceramic liner inserter 300, according to an embodiment of the present disclosure.
[0023] FIG. 3A depicts attachment of a connecting rod 301 of the ceramic liner inserter 300 with a pusher 309, according to an embodiment of the present disclosure.
[0024] FIG. 3A1 depicts various components of the ceramic liner inserter 300, according to an embodiment of the present disclosure.
[0025] FIG. 3A2 depicts a gripper wing 311a1, according to an embodiment of the present disclosure.
[0026] FIG. 3B depicts a rotating housing 305, according to an embodiment of the present disclosure.
[0027] FIG. 3C depicts a view of a deployment stage of the ceramic liner inserter 300, according to an embodiment of the present disclosure.
[0028] FIG. 4 depicts a ceramic liner inserter 400, according to an embodiment of the present disclosure.
[0029] FIG. 4A depicts attachment of a connecting rod 401 of the ceramic liner inserter 400 with a pusher 409, according to an embodiment of the present disclosure.
[0030] FIG. 4B depicts various components of the ceramic liner inserter 400, according to an embodiment of the present disclosure.
[0031] FIG. 4C depicts a view of a deployment stage of the ceramic liner inserter 400, according to an embodiment of the present disclosure.
[0032] FIG. 5 depict a ceramic liner inserter 500, according to an embodiment of the present disclosure.
[0033] FIG. 5A depicts attachment of a connecting rod 501 of the ceramic liner inserter 500 with a pusher 509, according to an embodiment of the present disclosure.
[0034] FIG. 5B-5B1 depict various components of the ceramic liner inserter 500, according to an embodiment of the present disclosure.
[0035] FIG. 5C depicts a view of a deployment stage of the ceramic liner inserter 500, according to an embodiment of the present disclosure.
DETAILED DESCRIPTION OF THE DRAWINGS
[0036] Prior to describing the disclosure in detail, definitions of certain words or phrases used throughout this patent document will be defined: the terms "include" and "comprise", as well as derivatives thereof, mean inclusion without limitation; the term "or" is inclusive, meaning and/or; the phrases "coupled with" and "associated therewith", as well as derivatives thereof, may mean to include, be included within, interconnect with, contain, be contained within, connect to or with, couple to or with, be communicable with, cooperate with, interleave, juxtapose, be proximate to, be bound to or with, have a property of, or the like. Definitions of certain words and phrases are provided throughout this patent document, and those of ordinary skill in the art will understand that such definitions apply in many, if not most, instances to prior as well as future uses of such defined words and phrases.
[0037] Reference throughout this specification to “one embodiment,” “an embodiment,” or similar language means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, appearances of the phrases “in one embodiment,” “in an embodiment,” and similar language throughout this specification may, but do not necessarily, all refer to the same embodiment, but mean “one or more but not all embodiments” unless expressly specified otherwise. The terms “including,” “comprising,” “having,” and variations thereof mean “including but not limited to” unless expressly specified otherwise. An enumerated listing of items does not imply that any or all of the items are mutually exclusive and/or mutually inclusive, unless expressly specified otherwise. The terms “a,” “an,” and “the” also refer to “one or more” unless expressly specified otherwise.
[0038] Although the operations of exemplary embodiments of the disclosed method may be described in a particular, sequential order for convenient presentation, it should be understood that the disclosed embodiments can encompass an order of operations other than the particular, sequential order disclosed. For example, operations described sequentially may in some cases be rearranged or performed concurrently. Further, descriptions and disclosures provided in association with one particular embodiment are not limited to that embodiment, and may be applied to any embodiment disclosed herein. Moreover, for the sake of simplicity, the attached figures may not show the various ways in which the disclosed system, method, and apparatus can be used in combination with other systems, methods, and apparatuses.
[0039] Furthermore, the described features, advantages, and characteristics of the embodiments may be combined in any suitable manner. One skilled in the relevant art will recognize that the embodiments may be practiced without one or more of the specific features or advantages of a particular embodiment. In other instances, additional features and advantages may be recognized in certain embodiments that may not be present in all embodiments. These features and advantages of the embodiments will become more fully apparent from the following description and apportioned claims, or may be learned by the practice of embodiments as set forth hereinafter.
[0040] The present disclosure relates to a medical device used for insertion of a ceramic liner into an acetabular cup during a hip joint prosthesis implantation procedure. Various embodiments of the present disclosure provide a ceramic liner inserter having a connecting rod, a handle, a pusher and a gripper. The pusher is coupled to the connecting rod at a distal end of the connecting rod. A distal end of the pusher generally matches a shape of the ceramic liner and is configured to contact an inner surface of the ceramic liner. Various embodiments of the gripper disclose means to grip the ceramic liner. During the hip joint prosthesis implantation procedure, the acetabular cup is implanted into a femoral bone cavity. To insert the ceramic liner into the acetabular cup, the gripper is configured to engage an outer surface of the ceramic liner and the distal end of the pusher contacts an inner surface of the ceramic liner such that the ceramic liner is secured between the gripper and the pusher. Once the ceramic liner is secured, a medical practitioner may insert the ceramic liner into the acetabular cup and apply force on the connecting rod using the handle. In response to the application of the force on the connecting rod, the pusher is configured to push the ceramic liner into the acetabular cup. Once the ceramic liner is in place, the ceramic liner is released from the gripper. In an embodiment, in response to the gripper contacting the acetabular cup, the gripper is configured to move in a proximal direction thereby releasing the ceramic liner into the acetabular cup. In an embodiment, the gripper includes a plurality of gripper wings. Each gripper wing of the plurality of gripper wings includes an overhang portion provided at a distal end of the gripper wing. The overhang portion includes a notch configured to engage the outer surface of the ceramic liner. In response to the overhang portion contacting the acetabular cup, the gripper is configured to move in the proximal direction. In an embodiment, the gripper includes a disc portion at a distal end of the gripper. The disc portion includes a holding surface having a groove in the distal direction of the gripper. The groove is configured to engage the outer surface of the ceramic liner. In response to the holding surface contacting the acetabular cup, the gripper is configured to move in the proximal direction. According to various embodiments, the ceramic liner inserter includes means to move the gripper in the proximal direction to release the ceramic liner without any intervention by the medical practitioner. According to other embodiments, the ceramic liner inserter includes means that can be easily operated by the medical practitioner to release the ceramic liner. Further, in various embodiments, the connecting rod may include a curvature, which reduces force needed by the medical practitioner to push the ceramic liner. Thus, the proposed ceramic liner inserter allows for easy and speedy insertion of the ceramic liner into the acetabular cup.
[0041] Now referring to figures, FIG. 1, shows a ceramic liner inserter 100, according to an embodiment. The ceramic liner inserter 100 includes a connecting rod 101, a handle 103, a gripper 105 and a pusher 107.
[0042] The connecting rod 101 includes a proximal end and a distal end. At the proximal end, the connecting rod 101 is coupled to the handle 103. At the distal end, the connecting rod 101 is coupled to the gripper 105 and the pusher 107. The connecting rod 101 also includes a curvature 101a. The curvature 101a reduces efforts for liner insertion during the surgical implantation procedure. In an embodiment, the connecting rod 101 may be substantially straight along longitudinal direction without any curvature. In an embodiment, the connecting rod 101 is made of, without limitation, 17-4PH, SS316 or any suitable surgical grade material. The diameter of the connecting rod 101 can be between 5 mm to 50 mm. The diameter of the connecting rod 101 is 10mm, according to an embodiment. It should be appreciated though that the dimensions of the connecting rod 101 may be suitably designed based upon the application of the ceramic liner inserter 100. The handle 103 can be made of, without limitation, 17-4PH stainless steel, SS316 or any suitable surgical grade material. The handle 103 includes a grip 103a. The grip 103a is designed and shaped so as to provide a better grip during the implantation procedure. For example, the grip 103a may include a plurality of serrations. In an embodiment, the grip 103a is made of, without limitation, silicone rubber.
[0043] The connecting rod 101 is coupled to the pusher 107 by a snap-fit mechanism (as shown in FIG. 1A). In an embodiment the distal end of the connecting rod 101 is coupled to the pusher 107 using a canted coil spring mechanism. Accordingly, the snap-fit mechanism includes a canted coil spring 107a provided in the pusher 107 for connecting the connecting rod 101 to the pusher 107. In an example implementation the canted coil spring 107a is Bal Spring. The pusher 107 may include a groove in the opening 107d to receive the canted coil spring 107a. The connecting rod 101 includes a groove (not shown) to connect with the canted coil spring 107a. The width and the height of the groove of the connecting rod 101 corresponds to the width and the height of the canted coil spring 107a.
[0044] The pusher 107 includes a proximal end 107b and a distal end 107c, according to an embodiment. The pusher 107 is configured to push the ceramic liner 119 into an acetabular cup in response to the application of force via the connecting rod 101. The force is applied on the connecting rod 101 through the handle 103. The proximal end 107b is flat having an opening 107d in the center. The opening 107d extends in the distal direction to form a cylindrical or hemispherical cavity in an embodiment. The diameter of the opening 107d is substantially equal to a diameter of the connecting rod 101 such that the distal end of the connecting rod 101 can insert into the pusher 107. The diameter of opening 107d can be 9.5 mm and a depth of the opening 107d can be 6 mm, according to an embodiment. The diameter of the canted coil spring 107a can be 9 mm according to an embodiment. The diameter of groove can be 12 mm with a depth of 2.5 mm, according to an embodiment. It should be appreciated though that the dimensions of the opening 107d, the canted coil spring 107a and the groove may be suitably designed based upon the application of the ceramic liner inserter 100.
[0045] The distal end 107c of the pusher 107 is a curved surface that substantially matches with inner surface of the ceramic liner 119. The distal end 107c is configured to contact the inner surface of the ceramic liner 119. In an embodiment, the pusher 107 is made of, without limitation, medical grade acetal co-polymer.
[0046] Referring to FIG. 1B, the gripper 105 includes a plurality of gripper wings 105a. The plurality of gripper wings 105a form a circular structure and extend radially outward from the longitudinal axis of the ceramic liner inserter 100. In an example implementation (shown in FIG. 1B), the plurality of gripper wings 105a include five gripper wings 105a. It should be appreciated that the plurality of gripper wings 105a may include less than five wings or more than five wings so as to allow proper gripping of the ceramic liner 119. In an embodiment, the plurality of gripper wings 105a can be made of, without limitation, medical grade acetal co-polymer. Each gripper wing (105a) of the plurality of gripper wings 105a includes a protrusion 105a3 and an overhang portion 105a1 having a notch 105a2. The plurality of notches 105a2 are configured to engage an outer surface of the ceramic liner 119 during the operation of the ceramic liner inserter 100.
[0047] The ceramic liner inserter 100 includes a housing 117. The housing 117 is a hollow cylindrical structure coupled to the distal end of the connecting rod 101, for example, via a sliding fit mechanism. A distal end of the housing 117 is coupled to the gripper 105. In an embodiment, each gripper wing 105a of the plurality of gripper wings 105a is coupled to the distal end of the housing 117, using, for example, a pin-and-weld joint. In an embodiment, the housing 117 is made of 17-4PH, SS316 or any suitable medical grade steel. The ceramic liner inserter 100 includes a coupling element operatively coupled to the gripper 105. In an embodiment, the coupling element is configured to move the gripper 105 in the proximal direction in response to the overhang portion 105a1 contacting the acetabular cup thereby releasing the ceramic liner 119. According to an embodiment, the coupling element includes a link ring 109 and a plurality of links 111. The ceramic liner inserter 100 may further include a spring 113 and a spring stopper 115. The spring 113 is disposed over the housing 117 between a distal end of the spring stopper 115 and a proximal end of the link ring 109. The spring 113 has a rest state and a compressed state. In the rest state, the spring 113 is configured to apply force on the link ring 109 in a distal direction. In an embodiment, the spring 113 is made of 17-4PH, SS316 or any suitable medical grade steel. The spring stopper 115 is a hollow ring-like structure disposed over the housing 117 at the proximal end of the housing 117. The spring stopper 115 is made of 17-4PH, SS316 or any suitable medical grade steel.
[0048] The link ring 109 is slidably disposed over the housing 117 and is coupled to the gripper 105. In an embodiment, in response to the overhang portions 105a1 contacting the acetabular cup, the link ring 109 is configured to slide over the housing 117 in the proximal direction, thereby moving the gripper 105 in the proximal direction. The link ring 109 includes a plurality of notches (not shown) to attach the plurality of links 111. In an embodiment, the link ring 109 is made of 17-4PH, SS316 or any suitable medical grade steel. The plurality of links 111 include a proximal end 111b and a distal end 111a. Each of the plurality of links 111 is coupled to a respective notch of the plurality of notches of the link ring 109 at the proximal end 111b and to a protrusion 105a3 of a respective gripper wing 105a of the plurality of gripper wings 105a at the distal end 111a of the link 111 such that the plurality of gripper wings 105a is fixedly coupled to the link ring 109. In an embodiment, the link 111 is coupled to the respective protrusion 105a3 and the respective notch using a pin and weld joint. In an embodiment, the plurality of links 111 is made of 17-4PH, SS316 or any suitable medical grade steel.
[0049] During the operation of the ceramic liner inserter 100, as shown in FIG. 1C, the plurality of gripper wings 105a couple to the outer layer of the ceramic liner 119 at the plurality of notches 105a2. The inner layer of the ceramic liner 119 is coupled to the distal end 107c of the pusher 107 such that the ceramic liner 119 is disposed between the pusher 107 and the gripper 105. The ceramic liner 119 is placed over the acetabular cup. The force is applied on the ceramic liner 119 through the handle 103. Once the overhang portion 105a1 contacts a rim of the acetabular cup, there is an upward force, which results in the link ring 109 moving in the proximal direction. As the plurality of gripper wings 105a are fixedly coupled to the link ring 109, the plurality of gripper wings 105a also moves in the proximal direction, thereby releasing the ceramic liner 119 into the acetabular cup. The pusher 107 pushes the ceramic liner 119 into the acetabular cup.
[0050] Now referring to FIG. 2, the ceramic liner inserter 200 includes a connecting rod 201, a handle 203, a housing 205, a gripper 207 having a plurality of gripper wings 207a1 and a pusher 209, according to an embodiment.
[0051] The connecting rod 201 includes a proximal end and a distal end. At the proximal end, the connecting rod 201 is coupled to the handle 203. In an embodiment, the connecting rod 201 is made of, without limitation, 17-4PH, SS316 or any suitable surgical grade material. The connecting rod 201 also includes a curvature 201a. The curvature 201a reduces efforts for liner insertion during the surgical implantation procedure. In an embodiment, the connecting rod 201 may be substantially straight along longitudinal direction without any curvature. The diameter of the connecting rod 201 can be between 5 mm to 50 mm. In an embodiment, the diameter of the corresponding rod 101 is 10 mm. It should be appreciated though that the dimensions of the connecting rod 101 may be suitably designed based upon the application of the ceramic liner inserter 200. The handle 203 can be made of, without limitation, 17-4PH stainless steel, SS316 or any suitable surgical grade material. The handle 203 includes a grip 203a. The grip 203a is designed and shaped so as to provide a better grip during the implantation. For example, the grip 203a may include a plurality of serrations. In an embodiment, the grip 203a is made of, without limitation, silicone rubber.
[0052] As shown in FIG. 2A, the connecting rod 201 is coupled to the pusher 209 at the distal end of the connecting rod 201 by a snap-fit mechanism. In an embodiment the connecting rod 201 is coupled to the pusher 209 using a canted coil spring mechanism. Accordingly, the snap-fit mechanism includes a canted coil spring 209a provided in the pusher 209 for connecting the connecting rod 201 to the pusher 209. The connecting rod 201 also includes an arrangement, for example, a groove, (not shown) for connecting the connecting rod 201 to the pusher 209 through the canted coil spring 209a. In an example implementation the canted coil spring 209a is Bal Spring.
[0053] The pusher 209 includes a proximal end 209b and a distal end 209c, according to an embodiment. The pusher 209 is configured to push a ceramic liner 221 in an acetabular cup in response to the application of force via the connecting rod 201. The force is applied on the connecting rod 201 through the handle 203. The proximal end 209b is flat having an opening 209d in the center. The opening 209d extends in the distal direction to form a cylindrical or a hemispherical cavity in an embodiment. The pusher 209 also includes a groove (not shown) to receive the canted coil spring 209a. The diameter of opening 209d can be 9.5 mm and a depth of the opening 209d can be 6 mm, according to an embodiment. The diameter of the canted coil spring 209a can be 9 mm, in an embodiment. The diameter of groove of the pusher 209 can be 12 mm with a depth of 2.5 mm, according to an embodiment. It should be appreciated though that the dimensions of the opening 209d, the canted coil spring 209a and the groove may be suitably designed based upon the application of the ceramic liner inserter 200.
[0054] The diameter of the opening 209d is substantially equal to a diameter of the connecting rod 201 such that the distal end of the connecting rod 201 can insert into the pusher 209. The distal end 209c of the pusher 209 is a curved surface that substantially matches with an inner surface of the ceramic liner 221. The distal end 209c is configured to contact the inner surface of the ceramic liner 221. In an embodiment, the pusher 209 is made of, without limitation, medical grade acetal co-polymer.
[0055] Referring to FIG. 2B, the housing 205 includes a proximal end and a distal end. The housing 205 is disposed towards the distal end of the connecting rod 201. The housing 205 is slidably coupled to the connecting rod 201 at the proximal end of the housing 205 and operatively coupled to the gripper 207 at the distal end of the housing 205. The housing 205 is coupled to the connecting rod 201 by a snap-fit mechanism. In an embodiment the connecting rod 201 is coupled to the housing 205 using a canted coil spring 201b. In an example implementation, the canted coil spring 201b is Bal Spring. The housing 205 includes a groove (not shown) to receive the canted coil spring 201b. The width and height of the groove corresponds to the width and the height of the canted coil spring 201b. The housing 205 includes an opening (not shown) and the diameter of the opening is substantially equal to a diameter of the connecting rod 201 such that the distal end of the connecting rod 201 can insert into the housing 205.
[0056] Referring to FIG. 2C, the housing 205 includes a cylindrical portion 205e (as shown in FIG. 2C1) at its proximal end and a disc portion 205c at its distal end. The cylindrical portion 205e is coupled to the connecting rod 201. The housing 205 defines a lumen 205b at the inner surface. The lumen 205b allows the longitudinal movement of the housing 205 on the connecting rod 201, during the operation. The disc portion 205c also includes a plurality of openings 205a extending radially inwards from the circumference. The openings 205a may be dovetail shaped, in one embodiment (as shown in FIG. 2C3). The number of the plurality of openings 205a correspond to the number of the plurality of gripper wings 207a1.
[0057] The gripper 207 is operatively coupled to the housing 205 using a coupling element. As shown in FIG. 2C2, each of the plurality of gripper wings 207a1 includes a coupling portion 207c (at a proximal end of the gripper wing 207a1) having a hole, a central portion 207a, and an overhang portion 207b (at a distal end of the gripper wing 207a1) in one embodiment. The central portion 207a is disposed between the coupling portion 207c and the overhang portion 207b. The overhang portion 207b includes a notch 207b1 configured to engage an outer surface of the ceramic liner 221. According to an embodiment, in response to the overhang portion 207b contacting the acetabular cup, the housing 205 is configured to move over the connecting rod 201 thereby moving the gripper 207 in the proximal direction. In an embodiment, the plurality of gripper wings 207a1 can be made of, without limitation, medical grade acetal co-polymer. The shape of the central portion 207a corresponds to the shape of the plurality of openings 205a. In an embodiment, the central portion 207a is dovetail shaped (as shown in FIG. 2C2). The central portion 207a of gripper wing 207a1 is configured to slide within a corresponding opening 205a of the plurality of openings 205a of the housing 205 enabling the plurality of gripper wings 207a1 to slide radially inward and outward during the operation of the ceramic liner inserter 200. Though the shape of the plurality of openings 205a and the central portions 207a are shown to have dovetail shape, it should be appreciated that the plurality of openings 205a and the central portions 207a may have any other suitable shape.
[0058] According to an embodiment, the coupling element includes a link ring 217 and a plurality of links 211. The ceramic liner inserter 200 may further include a push button 213, a stopper nut 215, and a spring 219. The link ring 217 is coupled to each gripper wing 207a1 of the plurality of gripper wings 207a1. The plurality of gripper wings 207a1 are configured to move in a radial direction in response to the movement of the link ring 217 in a longitudinal direction. The link ring 217 is a cylindrical structure (as shown in FIG. 2C5) disposed on the housing 205. The link ring 217 includes a plurality of notches 217a. The push button 213 is coupled at a proximal end of the link ring 217. In an embodiment, the push button 213 and the link ring 217 form an integral structure. The spring 219 is disposed over the housing 205 between a distal end of the link ring 217 and a proximal end of the disc portion 205c of the housing 205. The spring 219 has a rest state and a compressed state. In the rest state, the spring 219 is configured to apply a force on the link ring 217 in the proximal direction. The stopper nut 215 is a cylindrical structure coupled to the proximal end of the housing 205. The stopper nut 215 is configured to restrict movement of the link ring 217 along the longitudinal axis of the connecting rod 201 in the proximal direction.
[0059] Each link 211 of the plurality of links 211 includes a plurality of slots 211a, an end A, and an end B, as shown in FIG. 2C4. Each link 211 is coupled to a respective notch 217a of the plurality of notches 217a of the link ring 217 at the end A and is coupled to a coupling portion 207c of a respective gripper wing 207a1 of the plurality of gripper wings 207a1 at the end B such that the plurality of gripper wings 207a1 is coupled to the link ring 217 to slide through the plurality of openings 205a along the radial direction and hold the ceramic liner 221, during the operation. In an embodiment, the links 211 are coupled to the link ring 217 and the plurality of gripper wings 207a1 using a pin-and-weld joint. For example, each notch 217a includes a hole. The hole of the notch 217a is aligned with respective slots 211a. A pin is inserted through the hole of the notch 217a and the respective slots 211a and then welded together.
[0060] During the operation of ceramic liner inserter 200 (as shown in FIG. 2D), a force is applied through the push button 213 causing the link ring 217 to move in the distal direction. In response to the force applied on the push button 213, the link ring 217 is configured to slide over the housing 205 in a distal direction, causing the plurality of gripper wings 207a1 to slide in a radially outward direction through the plurality of openings 205a and the spring 219 to be in the compressed state. The ceramic liner 221 is disposed between the pusher 209 and the gripper 207 such that the outer surface of the ceramic liner 221 contacts the plurality of notches 207b1 and an inner surface of the ceramic liner 221 contacts the distal end of the pusher 209. Once the push button 213 is released, i.e., in response to the force applied on the push button 213 being removed, the spring 219 moves back to the rest state applying force on the link ring 217 in the proximal direction. Consequently, the link ring 217 is configured to slide over the housing 205 in the proximal direction, causing the plurality of gripper wings 207a1 to move in a radially inward direction through the plurality of openings 205a and secure the ceramic liner 221. Further, the ceramic liner 221 is placed in the acetabular cup followed by applying impaction force through the handle 203. Once the plurality of overhang portions 207b touches the rim of the acetabular cup, the plurality of overhang portions 207b apply a force on the disc portion 205c. The applied force results in the housing 205 and the gripper 207 slide in the proximal direction; thereby, releasing the ceramic liner 221. Further, the pusher 209 pushes the ceramic liner 221 into the acetabular cup.
[0061] Now referring to FIG. 3, the ceramic liner inserter 300 includes a connecting rod 301, a handle 303, a housing 307 and a pusher 309, according to an embodiment.
[0062] The connecting rod 301 includes a proximal end and a distal end. At the proximal end, the connecting rod 301 is coupled to the handle 303. At the distal end, the connecting rod 301 is coupled to the pusher 309. In an embodiment, the connecting rod 301 is made of, without limitation, 17-4PH, SS316 or any suitable surgical grade material. The diameter of the connecting rod 301 can be between 5 mm to 50 mm. In an embodiment, the diameter of the connecting rod 301 is 10 mm. It should be appreciated though that the dimensions of the connecting rod 301 may be suitably designed based upon the application of the ceramic liner inserter 300. The connecting rod 301 includes a curvature 301a which reduces efforts for liner insertion during the surgical implantation procedure. In an embodiment, the connecting rod 301 may be substantially straight along longitudinal direction without any curvature. The handle 303 can be made of, without limitation, 17-4PH stainless steel, SS316 or any suitable surgical grade material. The handle 303 includes a grip 303a. The grip 303a is designed and shaped so as to provide a better grip during the implantation. For example, the grip 303a may include a plurality of serrations. In an embodiment, the grip 303a is made of silicon.
[0063] The connecting rod 301 is coupled to the pusher 309 by a snap-fit mechanism. In an embodiment the connecting rod 301 is coupled to the pusher 309 using a canted coil spring mechanism. Accordingly, the snap fit mechanism includes a canted coil spring 309a provided in the pusher 309 (as shown in FIG. 3A). The connecting rod 301 also includes an arrangement, for example, a groove, (not shown) for connecting the connecting rod 301 to the pusher 309 through the canted coil spring 309a. In an example implementation, the canted coil spring 309a is Bal Spring.
[0064] The pusher 309 includes a proximal end 309b and a distal end 309c, according to an embodiment. The pusher 309 is configured to push a ceramic liner 313 into an acetabular cup in response to application of force via the connecting rod 301. The force is applied on the connecting rod 301 through the handle 303. The proximal end 309b is flat having an opening 309d in the center. The opening 309d extends in the distal direction to form a cylindrical or hemispherical cavity in an embodiment. The diameter of the opening 309d is substantially equal to a diameter of the connecting rod 301 such that the distal end of the connecting rod 301 can insert into the pusher 309. The diameter of the opening 309d can be 9.5 mm and the depth of the opening 309d can be 6 mm, according to an embodiment. The diameter of the canted coil spring 309a can be 9 mm, according to an embodiment. The diameter of the groove can be 12 mm with a depth of 2.5 mm, according to an embodiment. It should be appreciated though that the dimensions of the opening 309d, the canted coil spring 309a and the groove may be suitably designed based upon the application of the ceramic liner inserter 300.
[0065] The distal end 309c of the pusher 309 is a curved surface that substantially matches with an inner surface of the ceramic liner 313. The distal end 309c is configured to contact the inner surface of the ceramic liner 313. The pusher 309 includes a groove (not shown) to receive the canted coil spring 309a that allows the connecting rod 301 to attach to the pusher 309. In an embodiment, the pusher 309 is made of, without limitation, medical grade acetal co-polymer.
[0066] Referring to FIG. 3A1, the housing 307 is hollow structure coupled to the connecting rod 301 at a proximal end of the housing 307. The housing 307 includes a cylindrical portion 307a at the proximal end of the housing 307, coupled to the connecting rod 301 and a disc portion 307b at a distal end of the housing 307. In an embodiment, the connecting rod 301 and the housing 307 are coupled using a snap-fit mechanism. In an embodiment, the snap-fit mechanism includes a canted coil spring 301b. In an example implementation, the canted coil spring 301b is Bal Spring. A proximal end of the cylindrical portion 307a of the housing 307 includes a groove (not shown) to receive the canted coil spring 301b. The connecting rod 301 also includes a corresponding groove (not shown) to couple the canted coil spring 301b to connect the housing 307 to the connecting rod 301. The width and height of the groove on the housing 307 and the groove on the connecting rod 301 correspond to the width and the height of the canted coil spring 301b.
[0067] The disc portion 307b defines a lumen at the inner surface and includes a plurality of openings 307b1 extending radially inwards from the circumference. The plurality of openings 307b1 may be dovetail shaped, according to an embodiment. The housing 307 includes a retaining ring 307a1 disposed on an outer surface of the cylindrical portion 307a. The retaining ring 307a1 restricts the upward movement of a rotating housing 305 during the operation.
[0068] The ceramic liner inserter 300 also includes a gripper 311 having a plurality of gripper wings 311a1. Each gripper wing 311a1 of the plurality of gripper wings 311a1 includes a central portion 311a, a coupling portion 311b (at a proximal end of the gripper wing 311a1), and an overhang portion 311c (at a distal end of the gripper wing 311a1), in one embodiment (as shown in FIG. 3A2). The central portion 311a is disposed between the coupling portion 311b and the overhang portion 311c. The overhang portion 311c includes a notch 311c1 as shown in FIG. 3C. The notch 311c1 is configured to engage an outer surface of the ceramic liner 313. The central portions 311a of the gripper wings 311a1 are configured to slide within the plurality of openings 307b1 in a radial direction. The shape of the central portions 311a corresponds to the shape of the plurality of openings 307b1. In an embodiment, the central portion 311a is dovetail shaped. It should be appreciated that the plurality of openings 307b1 and the central portion 311a may have any other suitable shape. In an embodiment, the plurality of gripper wings 311a1 include four gripper wings 311a1. It should be appreciated that the plurality of gripper wings 311a1 may include less than or more than four wings to allow proper gripping of the ceramic liner 313. In an embodiment, the plurality of gripper wings 311a1 can be made of, without limitation, medical grade acetal co-polymer.
[0069] The ceramic liner inserter 300 includes a coupling element operationally coupled to each gripper wing 311a1. The coupling element is configured to move the plurality of gripper wings 311a1 in a radial direction. For example, the coupling element is configured to move the plurality of gripper wings 311a1 in a radially inward direction to secure the ceramic liner 313 and in a radially outward direction to release the ceramic liner 313 during the operation of the ceramic liner inserter 300. In an embodiment, the coupling element includes a rotating housing 305. The rotating housing 305 has a proximal end and a distal end. The rotating housing 305 is disposed on the housing 307 proximal to the disc portion 307b. The rotating housing 305 may be cylindrical, disc-shaped, etc. In the depicted embodiment, the rotating housing 305 is disc-shaped. The rotating housing 305 includes a knob 305a. The knob 305a can be a cylindrical structure coupled to the rotating housing 305 at the proximal end of the rotating housing 305. The outer surface of the knob 305a may include a plurality of ridges to provide a better grip for the rotation of the knob 305a during the operation. Diameter of the knob 305a is 20 mm, according to an embodiment. It should be appreciated though that the dimensions of the knob 305a may be suitably designed such that it can be operated comfortably by a medical practitioner.
[0070] Referring to FIG. 3B, the rotating housing 305 also includes an internal groove 305b and a spiral gear 305c. The internal groove 305b of the rotating housing 305 is used to couple the retaining ring 307a1 to the rotating housing 305. The dimension of the internal groove 305b may have a diameter of 12 mm and a depth of 2.5 mm, according to an embodiment. It should be appreciated though that the dimensions of the internal groove 305b may be suitably designed based upon the application of the ceramic liner inserter 300.
[0071] The spiral gear 305c provided at the distal end of the rotating housing 305 includes a plurality of rings in a form of coil. The spiral gear 305c is configured to engage the coupling portion 311b of each gripper wing 311a1 of the plurality of gripper wings 311a1. The coupling portion 311b of each gripper wing 311a1 is configured to move radially inward or outward along the spiral gear 305c depending upon the rotation of the knob 305a. For example, in response to rotating the knob 305a in a first direction, the coupling portion 311b is configured to move outward along the spiral gear 305c, causing the gripper wing 311a1 to move in a radially outward direction. Similarly, in response to rotating the knob 305a in a second direction, the coupling portion 311b is configured to move inward along the spiral gear 305c, causing the gripper wing 311a1 to move in a radially inward direction. In an embodiment, the first direction is counter-clockwise and the second direction is clockwise. In another embodiment, the first direction is clockwise and the second direction is counter-clockwise. The material used for making the spiral gear 305c in an embodiment can be 17-4PH, or any suitable medical grade steel.
[0072] As shown in FIG. 3C, during the operation of the ceramic liner inserter 300, the medical practitioner places the ceramic liner 313 at the distal end 309c of the pusher 309 and rotates the knob 305a in a counter clockwise direction. As a result, the coupling portion 311b of each gripper wing 311a1 moves radially outward within the spiral gear 305c, causing the plurality of gripper wings 311a1 to move radially outwards through the plurality of openings 307b1. The outer surface of the ceramic liner 313 contacts the plurality of notches 311c1. The medical practitioner then rotates the knob 305a in a clockwise direction causing the coupling portion 311b of each gripper wing 311a1 moves radially inwards within the spiral gear 305c and the plurality of gripper wings 311a1 sliding in the radially inward direction through the plurality of openings 307b1; thereby securing the ceramic liner 313 with the plurality of gripper wings 311a1. Further, the ceramic liner 313 is placed over the acetabular cup. The knob 305a is rotated in the counter clockwise direction. As described earlier, the coupling portions 311b move radially outward within the spiral gear 305c and the plurality of gripper wings 311a1 move radially outward to release the ceramic liner 313 in the appropriate position. Further, the handle 303 and pusher 309 are used to generate force for pushing the ceramic liner 313 into the acetabular cup.
[0073] Now referring to FIG. 4, the ceramic liner inserter 400 includes a connecting rod 401, a handle 403, a gripper 407 and a pusher 409.
[0074] The connecting rod 401 includes a proximal end and a distal end. At the proximal end, the connecting rod 401 is coupled to the handle 403. At the distal end, the connecting rod 401 is coupled to the gripper 407 and the pusher 409. In an embodiment, the connecting rod 401 is made of, without limitation, 17-4PH, SS316 or any suitable surgical grade material. The connecting rod 401 also includes a curvature 401a. The curvature 401a reduces efforts for liner insertion during the surgical implantation procedure. In an embodiment, the connecting rod 401 may be substantially straight along longitudinal direction without any curvature. In an embodiment, the connecting rod 401 is made of, without limitation, 17-4PH, SS316 or any suitable surgical grade material. The diameter of the connecting rod 401 can be between 5 mm to 50 mm. In an embodiment, the diameter of the connecting rod 401 is 10 mm. It should be appreciated though that the dimensions of the connecting rod 401 may be suitably designed based upon the application of the ceramic liner inserter 400. The handle 403 includes a cap 405 at the proximal end of the connecting rod 401 and a grip 403a. The grip 403a is designed and shaped so as to provide a better grip during the implantation. For example, the grip 403a may include a plurality of serrations. In an embodiment, the grip 403a is without limitation, silicone rubber. The handle 403 can be made of, without limitation, 17-4PH stainless steel, SS316 or any suitable surgical grade material. In an embodiment, the cap 405 is made of 17-4PH.
[0075] In an embodiment, the connecting rod 401 is coupled to the pusher 409 by a snap-fit mechanism (as shown in FIG. 4A). In an embodiment the connecting rod 401 is coupled to the pusher 409 using a canted coil spring mechanism. Accordingly, the snap-fit mechanism includes a canted coil spring 409a, provided in the pusher 409. The connecting rod 401 also includes a groove 401b (shown in FIG. 4B) for coupling the connecting rod 401 with the canted coil spring 409a. In an example implementation, the canted coil spring 409a is Bal Spring.
[0076] The pusher 409 includes a proximal end 409b and a distal end 409c, according to an embodiment (as shown in FIG. 4A). The pusher 409 is configured to push a ceramic liner 411 into an acetabular cup in response to the application of force via the connecting rod 401. The force may be applied on the connecting rod 401 through the handle 403. The proximal end 409b is flat having an opening 409d in the center. The opening 409d extends in the distal direction to form a cylindrical or hemispherical cavity. The opening 409d includes a groove (not shown) to receive the canted coil spring 409a. The width and height of the groove corresponds to the width and the height of the canted coil spring 409a. The diameter of the opening 409d is substantially equal to a diameter of the connecting rod 401 such that the distal end of the connecting rod 401 can insert into the pusher 409. The diameter of opening 409d can be 9.5 mm and the depth of the opening 409d can be 6 mm, according to an embodiment. The diameter of the canted coil spring 409a can be 9 mm, according to an embodiment. The diameter of the groove can be 12 mm with a depth of 2.5 mm, according to an embodiment. It should be appreciated though that the dimensions of the opening 409d, the canted coil spring 409a and the groove may be suitably designed based upon the application of the ceramic liner inserter 400.
[0077] The distal end 409c of the pusher 409 is a curved surface that substantially matches with an inner surface of the ceramic liner 411. The distal end 409c of the pusher 409 is configured to contact the inner surface of the ceramic liner 411. In an embodiment, the pusher 409 is made of, without limitation, medical grade acetal co-polymer.
[0078] Referring to FIG. 4B, the gripper 407 includes a disc portion 407b at a distal end of the gripper 407 and a guide sleeve 407c at a proximal end of the gripper 407. The disc portion 407b includes a holding surface 407f and a sealing member 407d. The guide sleeve 407c defines a lumen 407a. The gripper 407 is configured to slide over the connecting rod 401 in the proximal direction along the lumen 407a during the operation of the ceramic liner inserter 400. The holding surface 407f includes a groove 407e (shown in FIG. 4C) in the distal direction of the gripper 407. The holding surface 407f is configured to engage the outer surface of the ceramic liner 411 with the gripper 407. The gripper 407 is configured to move in the proximal direction in response to the holding surface 407f contacting the acetabular cup.
[0079] Further, the sealing member 407d is coupled to the disc portion 407b of the ceramic liner inserter 400. The function of the sealing member 407d is to provide a grip to a ceramic liner 411. In an embodiment, the sealing member 407d is configured to fit within the groove 407e present at the distal end of the disc portion 407b and engage the outer surface of the ceramic liner 411. In an embodiment, the sealing member 407d is a ring. The sealing member 407d can be made of silicone, silicon-like material, elastomer, gel-type material, alloys, or metals having shape memory. In an embodiment, the sealing member 407d is made of silicon. In another embodiment, the sealing member 407d may be a canted coil spring (such as, Bal Spring) engaging with the groove 407e.
[0080] Referring to FIG. 4C, during the operation of the ceramic liner inserter 400, ceramic liner 411 is coupled to the gripper 407 as shown. The sealing member 407d secures the ceramic liner 411 from outer surface of the ceramic liner 411. The ceramic liner 411 has a shape generally matching an inner surface profile of the acetabular cup (not shown). The ceramic liner 411 may have a tapered end (not shown) towards a proximal side of the ceramic liner 411. The tapered end of the ceramic liner 411 ensures better gripping by pushing the sealing member 407d in the grooves 407e. Once the gripper 407 holds the ceramic liner 411, the ceramic liner 411 is inserted into acetabular cup. Then, with the help of the pusher 409, the ceramic liner 411 is pushed into the acetabular cup (not shown). Once the holding surface 407f touches the rim of the acetabular cup (not shown), the gripper 407 moves upwards, thereby releasing the ceramic liner 411 into the acetabular cup (not shown).
[0081] Now referring to FIG. 5, the ceramic liner inserter 500 includes a connecting rod 501, a handle 503, a gripper 507 and a pusher 509. The connecting rod 501 includes a proximal end and a distal end. At the proximal end, the connecting rod 501 is coupled to the handle 503. At the distal end, the connecting rod 501 is coupled to the gripper 507 and the pusher 509. In an embodiment, the connecting rod 501 is made of, without limitation, 17-4PH, SS316 or any suitable surgical grade material.
[0082] The connecting rod 501 also includes a curvature 501a.The curvature 501a reduces efforts for liner insertion during the surgical implantation procedure. In an embodiment, the connecting rod 501 may be substantially straight along longitudinal direction without any curvature. The handle 503 can be made of, without limitation, 17-4PH stainless steel, SS316 or any suitable surgical grade material. The handle 503 includes a cap 505 at the proximal end of the connecting rod 501 and a grip 503a. The grip 503a is designed and shaped so as to provide a better grip during the implantation. For example, the grip 503a may include a plurality of serrations. In an embodiment, the grip 503a is made of, without limitation, silicone rubber.
[0083] In an embodiment, the connecting rod 501 is coupled to the pusher 509 by a snap-fit mechanism (shown in FIG. 5A). In an embodiment the connecting rod 501 is coupled to the pusher 509 using a canted coil spring mechanism. Accordingly, the snap-fit mechanism includes a canted coil spring 509a provided in the pusher 509. The connecting rod 501 also includes a groove 501b (as shown in FIG. 5B) for coupling the connecting rod 501 with the canted coil spring 509a. In an example implementation, the canted coil spring 509a is Bal Spring.
[0084] The pusher 509 includes a proximal end 509b and a distal end 509c, according to an embodiment (as shown in FIG. 5A). The pusher 509 is configured to push a ceramic liner 511 into an acetabular cup in response to the application of force via the connecting rod 501. The force may be applied on the connecting rod 501 through the handle 503. The proximal end 509b is flat having an opening 509d in the center. The opening 509d extends in the distal direction to form a cylindrical or hemispherical cavity. The opening 509d includes a groove (not shown) to receive the canted coil spring 509a. The width and height of the groove corresponds to the width and the height of the canted coil spring 509a. The diameter of the opening 509d is substantially equal to a diameter of the connecting rod 501 such that the distal end of the connecting rod 501 can insert into the pusher 509. The diameter of opening 509d can be 9.5 mm and the depth of the opening 509d can be 6 mm, according to an embodiment. The diameter of the canted coil spring 509a can be 9 mm, according to an embodiment. The diameter of groove can be 12 mm with a depth of 2.5 mm, according to an embodiment. It should be appreciated though that the dimensions of the opening 509d, the canted coil spring 509a and the groove may be suitably designed based upon the application of the ceramic liner inserter 500.
[0085] The distal end 509c of the pusher 509 is a curved surface that substantially matches with an inner surface of the ceramic liner 511. The distal end 509c is configured to contact the inner surface of the ceramic liner 511. In an embodiment, the pusher 509 is made of, without limitation, medical grade acetal co-polymer.
[0086] Referring to FIGS. 5B – 5B1, gripper 507 includes a disc portion 507b at a distal end of the gripper 507, and a guide sleeve 507c at a proximal end of the gripper 507. The disc portion 507b includes a holding surface 507d. The guide sleeve 507c defines a lumen 507a. The gripper 507 is configured to slide over the connecting rod 501 along the lumen 507a during the operation of the ceramic liner inserter 500. The holding surface 507d includes a groove 507e in the distal direction of the gripper 507 to help in coupling the ceramic liner 511 with the gripper 507. The groove 507e is configured to engage an outer surface of the ceramic liner 511. The gripper 507 is configured to move in the proximal direction in response to the holding surface 507d contacting the acetabular cup. The disc portion 507b also includes a slit 513 along a radial direction. The slit 513 is configured to expand and contract angularly during the operation of the ceramic liner inserter 500. In an embodiment, a diameter of the holding surface 507d is smaller than a diameter of the ceramic liner 511 towards a proximal end of the ceramic liner 511.
[0087] Referring to FIG. 5C, during operation of the ceramic liner inserter 500, the outer surface of the ceramic liner 511 is placed inside the groove 507e with a tapered end of the ceramic liner 511 aligned with the face of the groove 507e. When the proximal end of the ceramic liner 511 contacts the holding surface 507d, the slit 513 is configured to expand angularly because the diameter of the holding surface 507d is lower than the diameter of the ceramic liner 511 towards the proximal end of the ceramic liner 511. It increases holding diameter of the disc portion 507b momentarily so that the proximal end of the ceramic liner 511 can pass proximally and contact the face of the groove 507e. Once the proximal end of the ceramic liner 511 passes, the slit 513 is configured to contract angularly since the diameter of the ceramic liner 511 decreases distally due to its tapering shape. In other words, the holding surface 507d and the disc portion 507b return to a normal state. This leads to the ceramic liner 511 being held by the gripper 507 securely. Once the gripper 507 holds the ceramic liner 511, the ceramic liner 511 is inserted into the acetabular cup (not shown). Then, by applying a force by the handle 503, the pusher 509 pushes the ceramic liner 511 into the acetabular cup. As the holding surface 507d of the gripper 507 touches the rim of the acetabular cup, the gripper 507 moves upward, thereby releasing the ceramic liner 511 into the acetabular cup.
[0088] The scope of the invention is only limited by the appended patent claims. More generally, those skilled in the art will readily appreciate that all parameters, dimensions, materials, and configurations described herein are meant to be exemplary and that the actual parameters, dimensions, materials, and/or configurations will depend upon the specific application or applications for which the teachings of the present disclosure is/are used. , C , Claims:WE CLAIM
1. A ceramic liner inserter (100, 200, 400, 500) comprises:
a. a connecting rod (101, 201, 401, 501) having a proximal end and a distal end;
b. a pusher (107, 209, 409, 509) coupled to the connecting rod (101, 201, 401, 501) at the distal end of the connecting rod (101, 201, 401, 501) and having a distal end (107c, 209c, 409c, 509c) configured to contact an inner surface of a ceramic liner (119, 221, 411, 511), the pusher (107, 209, 409, 509) is configured to push the ceramic liner (119, 221, 411, 511) into an acetabular cup in response to application of force via the connecting rod (101, 201, 401, 501); and
c. a gripper (105, 207, 407, 507), provided at the distal end of the connecting rod (101, 201, 401, 501), configured to:
i. engage an outer surface of the ceramic liner (119, 221, 411, 511); and
ii. in response to the gripper (105, 207, 407, 507) contacting the acetabular cup, move in a proximal direction thereby releasing the ceramic liner (119, 221, 411, 511) into the acetabular cup.
2. The ceramic liner inserter (100, 200) as claimed in claim 1, wherein the gripper (105, 207) comprises a plurality of gripper wings (105a, 207a1), each gripper wing (105a, 207a1) comprising an overhang portion (105a1, 207b), at a distal end of the gripper wing (105a, 207a1), having a notch (105a2, 207b1) configured to engage the outer surface of the ceramic liner (119, 221), wherein, in response to the overhang portion (105a1, 207b) contacting the acetabular cup, the gripper (105, 207) is configured to move in the proximal direction.
3. The ceramic liner inserter (400, 500) as claimed in claim 1, wherein the gripper (407, 507), having a proximal end and a distal end, comprises a disc portion (407b, 507b), at the distal end of the gripper (407, 507), comprising a holding surface (407f, 507d) having a groove (407e, 507e) in the distal direction of the gripper (407, 507) and configured to engage the outer surface of the ceramic liner (411, 511), wherein in response to the holding surface (407f, 507d) contacting the acetabular cup, the gripper (407, 507) is configured to move in the proximal direction.
4. The ceramic liner inserter (400, 500) as claimed in claim 3, wherein the gripper (407, 507) comprises a guide sleeve (407c, 507c), at the proximal end of the gripper (407, 507), defining a lumen (407a, 507a), wherein the gripper (407, 507) is configured to slide over the connecting rod (401, 501) in the proximal direction along the lumen (407a, 507a).
5. The ceramic liner inserter (400) as claimed in claim 3, wherein the ceramic liner inserter (400) comprises a sealing member (407d) configured to fit within the groove (407e) and engage the outer surface of the ceramic liner (411).
6. The ceramic liner inserter (400) as claimed in claim 5, wherein the sealing member (407d) is a ring.
7. The ceramic liner inserter (400), as claimed in claim 5, wherein the sealing member (407d) is a canted coil spring.
8. The ceramic liner inserter (500) as claimed in claim 3, wherein the disc portion (507b) comprises a slit (513), along a radial direction, configured to expand and contract angularly.
9. The ceramic liner inserter (100, 200, 400, 500) as claimed in claim 1, wherein the connecting rod (101, 201, 401, 501) comprises a curvature (101a, 201a, 401a, 501a).
10. The ceramic liner inserter (100, 200, 400, 500) as claimed in claim 1, wherein the connecting rod (101, 201, 401, 501) and the pusher (107, 209, 409, 509) are coupled using a snap fit mechanism.
11. The ceramic liner inserter (100, 200, 400, 500) as claimed in claim 10, wherein the snap fit mechanism comprises a canted coil spring (107a, 209a, 409a, 509a), wherein the pusher (107, 209, 409, 509) comprises a groove to receive the canted coil spring (107a, 209a, 409a, 509a) and wherein the connecting rod (101, 201, 401, 501) comprises a groove (401b, 501b) to couple the connecting rod (101, 201, 401, 501) with the canted coil spring (107a, 209a, 409a, 509a).
12. The ceramic liner inserter (100, 200, 400, 500) as claimed in claim 1, wherein the ceramic liner inserter (100, 200, 400, 500) comprises a handle (103, 203, 403, 503) coupled to the proximal end of the connecting rod (101, 201, 401, 501), wherein the force is applied on the connecting rod (101, 201, 401, 501) through the handle (103, 203, 403, 503).