CLIAMS:1. SS-BAR BRIDGE - A FIXED PROSTHESIS TO REPLACE MISSING MAXILLARY ANTERIOR TEETH is a metal-ceramic bridge with long palatal arm called as connector which is a metal connection between retainer and the pontic; the connector is scalloped and near the free gingiva, which gives rigidity to connector and as the connector is near the free gingival it is not noticeable by the tongue which makes more comfort to the patient.
2. After doing a root canal treatment, tooth became non vital (dead) and fragile, over this root canal treated tooth metal/ceramic capping (crown) is must to strengthen the fragile tooth. Root canal treated tooth which acts as a primary abutment is prepared to receive crown. Crown is given or cemented on the prepared tooth is acts as a retainer (support) for SS-Bar bridge, thus bridge avoids preparation of healthy tooth/teeth adjacent to the edentulous areas.
3. The SS-BAR BRIDGE replaces the maxillary anterior teeth is having two occlusal/incisal rests on either side of pontic. These rests provide support and avoid the bridge to impinge on the soft tissue (gingiva). These rests also direct the masticatory forces in an axial direction of secondary abutments.
4. In SS-BAR BRIDGE, two small incisal/occlusal hook like preparation is done in enamel only, thus it is very conservative preparation and prevents undue trauma to the adjacent natural teeth.
5. SS-BAR BRIDGE replaces missing maxillary tooth/teeth, which is an innovation, to replace the lost multiple anterior teeth in upper jaw (maxillary arch), the rigidity and stability as our bridge does not get affected while replacing multiple missing anterior teeth.
,TagSPECI:
FORM 2

THE PATENT ACT 1970

(39 OF 1970)

&

THE PATENTS RULES, 2003

COMPLETE SPECIFICATION

(See SECTION 10, RULE 13)

1.TITLE OF THE INVENTION :

SS-BAR BRIDGE - A FIXED PROSTHESIS TO REPLACE MISSING MAXILLARY ANTERIOR TEETH
2.APPLICANT

NAME : KRISHNA INSTITUTE OF MEDICAL SCIENCES

NATIONALITY: DEEMED TO BE UNIVERSITY DECLARED
U/S 3 OF UGC ACT, 1956 VIDE
NOTIFICATION NO. F.9-15 / 2001 – U-3 OF
THE MINISTRY OF HUMANRESOURCES
DEVELOPMENT, GOVT.OF INDIA

ADDRESS : KRISHNA INSTITUTE OF MEDICAL SCIENCES,
NEAR DHEBEWADI ROAD, MALKAPUR, KARAD
MAHARASHTRA, INDIA

3.PREAMBLE TO THE DESCRIPTION
PROVISIONAL

N / A COMPLETE

The following Specification particularly describes the nature of this invention and the manner in which it is to be performed :

4. TECHINICAL FIELD

The present invention is related to medical science, particularly to the field of dentistry. It is related to the Prosthetic dentistry – a branch of dental sciences which deals with replacement of missing teeth with artificial material (dental prosthesis). SS Bar-Bridge, a fixed prosthesis is to replace the missing maxillary tooth/teeth with less reduction of adjacent teeth to restore the lost function (mastication) and esthetic (beauty).
5. BACKGROUND

Presently in dental sciences the missing tooth/teeth can replace by conventional fixed bridge prosthesis as one of the treatment modality. In conventional fixed bridge prosthesis, the missing teeth (edentulous area) can replace by tooth preparation (grinding) of the adjacent natural teeth (abutments). With the support of these abutment teeth, missing teeth is replaced. The dental impression is made and sent to dental laboratory. Using metal, ceramic or combination of metal and ceramic material, a fixed bridge is fabricated in the dental laboratory. This fabricated bridge is cemented on two adjacent prepared teeth with the dental cements. Thus, the missing tooth/ teeth are replaced by conventional fixed bridge.
The conventional fixed bridge to replace missing teeth is more destructive method as the natural adjacent teeth to the missing tooth require preparation (grinding) from all the surfaces. With the support of crown on adjacent natural teeth the missing tooth is replaced.
6.SUMMARY

Hence a new bridge is needed to replace the missing maxillary anterior (front) teeth with very minimal preparation and with the support of non-vital (root canal treated) posterior (back) tooth.
Therefore fixed bridge prosthesis to replace anterior teeth is made which is conservative and rigid called SS-Bar Bridge. It consists of pontic (tooth to be replaced), retainer which is cemented to a single distal abutment through rigid connector (Palatal arm) and occlusal/incisal rest on natural teeth adjacent to edentulous area. Therefore it is named as SS-BAR fixed Bridge. (Fixed Bridge with long Arm and occlusal/incisal Rest hence it is named as BAR bridge.)
SS-BAR Bridge is to replace the missing anterior tooth/teeth (edentulous area) [1] with the support of posterior tooth [6]. The patient with posterior tooth which is non-vital (Root canal treated) present on the same side of the missing tooth is utilized as an abutment (Primary abutment) for retention. The SS-BAR Bridge gets its main retention and support from the posterior root canal treated tooth [6]. The additional support is taken from the occlusal/ incisal rest seats [4 and 5] prepared on the anterior teeth adjacent (Secondary abutment) to the edentulous area. These secondary abutments are present on mesial [2] and distal [3] side of edentulous area. The rests also distribute and transfers the occlusal loads (forces) on the secondary abutments; therefore there is less occlusal load on the primary abutment.
The impression of patient’s dental arch is taken and sent to dental laboratory for fabrication. The SS-BAR bridge is fabricated with metal or metal-ceramic material in dental laboratory. It consists of four components (A) Retainer [8], (B) Connector [9], (C) Pontic [10] and (D) Occlusal/incisal rests [11 and 12].
After fabrication of SS-BAR bridge, it is cemented in patient mouth with dental cement. Retainer [8] is cemented on the primary abutment [6] which gives strength to the root canal treated tooth. Thus function of mastication is restored. The connector (palatal arm) [9], a metal extension from the retainer running anteriorly over the slope of palate [7]. It is scalloped in shape which gives more rigidity to the palatal arm. The connector is 0.5 mm thick, 3-4 mm thick and 4 mm away from gingiva (soft tissue). The bar is present on the lateral slope of the palate which does not interfere the movement of the tongue and is unnoticeable by the tongue during function hence it is more comfortable. The connector ends anteriorly at pontic [10], which replaced the missing anterior tooth with metal-ceramic material and thus restore the esthetic of patient. The pontic is having two metal extensions on distal [11] and mesial [12] side. These metal extensions are known as occlusal/Incisal rests cemented with dental cement on occlusal/Incisal rest seats. These rests direct the occlusal load on the secondary abutments. Thus it share occlusal forces and reduces the forces on primary abutment.
In short, SS-BAR bridge is a fixed prosthesis to replace the missing maxillary anterior teeth. It is a metal-ceramic bridge with long arm and rests.
It is a fixed prosthesis where posterior tooth crown is used as a retentive component. A long palatal arm is extending from the posterior crown to the anterior region. The arm is scalloped and 3-4 mm away from the free gingival. Long palatal arm is going parallel to free gingival to prevent impingement of soft tissue. The missing anterior teeth are replaced with a artificial material called pontic. The anterior teeth which are adjacent to missing area supporting the bridge are secondary abutment. This secondary abutment provides additional support to our fixed prosthesis.
Advantages Of SS-Bar Bridge
1] It is very conservative and less invasive.
2] It avoid unnecessary preparation of healthy/normal natural teeth
3] Utilizes non-vital (root canal treated) tooth as main support for our bridge (primary abutment)
4] The connector of our bridge is more rigid than Spring Bridge
5] It can replace multiple missing teeth (2-3 units of pontic)
6] Occlusal/incisal rest on adjacent teeth provides good secondary support.
7] Occlusal/incisal rests prevent trauma and impingement to the underlying tissue.
8] We can replace multiple missing anterior teeth the rigidity and stability of our bridge does not get affected while replacing multiple missing teeth.
9] In SS-Bar bridge as the preparation of adjacent natural teeth is not done, hence the fabrication of two adjacent anterior retainer’s fabrication is avoided. Thus the cost of two additional adjacent retainers is saved. This ultimately reduces the 2/3rd cost of patient.
10] The SS-BAR bridge replaces the maxillary anterior teeth is having two occlusal/incisal rests on either side of pontic. These rests provide support and avoid the bridge to impinge on the soft tissue (gingiva). These rests also direct the masticatory forces in an axial direction of secondary abutments.
11] Two small incisal/occlusal hook like preparation is done in enamel only. Thus is very conservative preparation and prevents undue trauma to the adjacent natural teeth.
7. BRIEF DESCRIPTION OF DRAWINGS:

Fig. 1 is the lateral view of upper dental arch with one anterior tooth is missing [1] on one side.

Fig. 2 shows the SS-Bar bridge to replace the maxillary anterior teeth with the support of posterior tooth.

Fig. 3 shows lateral view of the maxillary arch with SS-bar bridge in its position.

Fig. 4 Shows the top view of the maxillary arch with SS-bar bridge in its position.

8.DETAILS DESCRIPTION OF DRAWINGS:

The Fig. 1 shows lateral view of upper jaw teeth (Maxillary arch) with one missing anterior tooth (edentulous area) [1]. On either side of edentulous area, natural tooth on mesial [2] and distal [3] require small crescent or spoon shaped grinding (Preparation) called rest seats [4 and 5]. The adjacent teeth will acts as additional supporting structure (secondary abutments) for the SS-Bar Bridge. It also shows intact posterior teeth with one posterior tooth is root canal treated (non-vital and brittle) tooth. This tooth is grinded (prepared) to receive the crown to strengthen the root canal tooth. The posterior prepared tooth [6] will act as primary support (Primary abutment) for the SS-Bar bridge. No. [7] Show the slope of hard palate, which is a stress bearing area of maxilla.
Fig. 2 shows the SS-Bar bridge after fabricated in dental laboratory. It is fabricated in Nickel –Crome dental alloy with tooth coloured ceramic material. It shows components of SS-bar bridge as Retainer [8], Long Connector [9], Pontic [10] distal occlusal rest [11] and Mesial Incisal rest [12].
Fig. 3 shows the SS-Bar Bridge cemented in patient’s mouth with all its components in its positions. The primary abutment tooth which is posterior root canal treated non-vital tooth is prepared to receive metal/ceramic cap (crown). The crown which covers to reinforce the root canal treated tooth is known as retainer [8]. This retainer is cemented on the primary abutment natural tooth with the dental cement. This retainer is having a metal extension or palatal arm known as connector [9] on palatal surface of primary abutment. The connector of the bridge is 0.3 mm thick and running towards the anterior teeth on palatal side. The connector follows the contour of the gingival at a distance of 3-4mm from the free gingival. The connector is travelling through slope of hard palate which is stress bearing area [7].This connector ends in anterior missing tooth area. The artificial tooth which replace missing tooth is known as pontic [10]. The pontic is having the two metal extensions on either side as incisal/occlusal rests [12 and 11]. This incisal/occlusal rests are cemented on the prepared rest seats on secondary abutments on mesial tooth [2] and distal tooth [3] adjacent to edentulous area.
Fig. 4 shows the top view of upper jaw (maxillary) teeth with SS-BAR bridge in its position. It shows retainer [8] cemented on root canal treated posterior tooth. The retainer is having an extension running towards anteriorly known as connector [9]. It travels over the slope of palate (7) till it reaches the anterior area. The connector ends at the area of missing tooth. The missing tooth is replaced with artificial tooth is known as pontic [10]. The pontic is having two metal extesions cemented on mesial side [12] and distal side [11] of natural teeth. The mesial and distal rests direct the forces to natural teeth.

9.I claim

1. SS-BAR BRIDGE - A FIXED PROSTHESIS TO REPLACE MISSING MAXILLARY ANTERIOR TEETH is a metal-ceramic bridge with long palatal arm called as connector which is a metal connection between retainer and the pontic; the connector is scalloped and near the free gingiva, which gives rigidity to connector and as the connector is near the free gingival it is not noticeable by the tongue which makes more comfort to the patient.
2. After doing a root canal treatment, tooth became non vital (dead) and fragile, over this root canal treated tooth metal/ceramic capping (crown) is must to strengthen the fragile tooth. Root canal treated tooth which acts as a primary abutment is prepared to receive crown. Crown is given or cemented on the prepared tooth is acts as a retainer (support) for SS-Bar bridge, thus bridge avoids preparation of healthy tooth/teeth adjacent to the edentulous areas.
3. The SS-BAR BRIDGE replaces the maxillary anterior teeth is having two occlusal/incisal rests on either side of pontic. These rests provide support and avoid the bridge to impinge on the soft tissue (gingiva). These rests also direct the masticatory forces in an axial direction of secondary abutments.
4. In SS-BAR BRIDGE, two small incisal/occlusal hook like preparation is done in enamel only, thus it is very conservative preparation and prevents undue trauma to the adjacent natural teeth.
5. SS-BAR BRIDGE replaces missing maxillary tooth/teeth, which is an innovation, to replace the lost multiple anterior teeth in upper jaw (maxillary arch), the rigidity and stability as our bridge does not get affected while replacing multiple missing anterior teeth.
Dated this 26thDay of December, 2012

DR.M.V.GHORPADE
(REGISTRAR)
FOR KRISHNA INSTITUTE OF MEDICAL SCIENCES

To
The Controller of Patents,
The patent office,
At Mumbai – 400 037

10.ABSTRACT OF THE INVENTION

SS-BAR bridge, a fixed prosthesis to replace the missing maxillary anterior teeth. It is a metal-ceramic bridge with long arm and rests.
It is a fixed prosthesis where posterior tooth crown is used as a retentive component. A long palatal arm is extending from the posterior crown to the anterior region. The arm is scalloped and 3-4 mm away from the free gingival. Long palatal arm is going parallel to free gingival to prevent impingement of soft tissue. The missing anterior teeth are replaced with an artificial material called pontic. The anterior teeth which are adjacent to missing area supporting the bridge are secondary abutment. This secondary abutment provides additional support to our fixed prosthesis.

DR.M.V.GHORPADE
(REGISTRAR)
FOR KRISHNA INSTITUTE OF MEDICAL SCIENCES