resin bonded bridge

1. Prepared by azheen mohamad

2. References
 contemporary-fixed- prosthodonics
4th edition ,chapter 26 ,pp805
www.slideshare.com
https://everythingdentistry.wordpress.
com/tag/lost-salt-technique/
http://www.slideserve.com/jana/resin-
bonded-fixed-partial-dentures-rbfpd

3. Introduction
A prosthesis that requires minimal removal
of tooth structure , particularly for abutment
teeth that are intact and caries free.
The primary goal of the resin bonded
FPD is the replacement of missing
teeth and maximum conservation of tooth
structure.

4. Definition
Resin bonded prosthesis
A prosthesis that is luted to tooth structure ,
primarily enamel , which has been etched to
provide mechanical retention for the composite
resin.

5. Types of FPD:-
Cantilever
Fixed-fixed
Fixed-movable
Hybrid

6. Cantilever bridge
Involves the use of single retainer
Abutment tooth maybe either mesial
or distal .
 Less expensive, but limited to
replacing one missing
tooth.

7. Fixed-fixed bridge
 One or more retainers are placed on either
side of the pontic.
 Differential movement of abutments can
result in bond failure.
 This design of bridge is indicated where
excursive movements on pontics cannot be
avoided.

8. Fixed-movable
bridge
 Design is in two parts, keyed together by a
non-rigid attachment .
 Connector which may be either ready or
laboratory-made, permits movement of the
two parts relative to each other in vertical
direction mainly.
 Provides stress breaking action.
 Should be used in short spans and where
opposing proximal walls of abutment cant be
prepared parallel.

9. Hybrid bridge
 A combination of a conventional
Retainer at one end and a resin-bonded
retainer at the other end of the pontic.
 Indicated where one of the abutments is
minimally restored,and a resin-bonded
retainer is used at this site to conserve
tooth tissue.
 The male part of the joint is often attached
to the resin-bonded retainer to simplify
maintenance when de-bond occurs.

10. Advantages of Resin bonded
bridges.
1) Reduced cost .
2) No anesthetic needed.
3) Supragingival margins.
4) Minimal tooth preparation.
5) Rebonding possible.

11. Disadvantages
Irreversible.
Uncertain longevity.
No space correction.
No alignment correction.
Difficult temporization.

12. Indications.
1) Adolescents with single missing teeth
(traumatic or congenital).
2) Caries- free abutment teeth and good oral
hygiene.
3) Maxillary incisor replacements (most
favorable prognosis) and Mandibular
incisor replacements.
4) Periodontal splints.
5) Single posterior tooth replacements.

13. Contraindications
Extensive caries.
Nickel sensitivity.
Deep vertical overbite.
Extensive restoration on abutment
teeth.
Parafuncitonal habits

14.  Developed in 1973.
It was a complete innovation.
Use of ring like retainers , with funnel shaped
perforations through them to enhance resin
retention.
Direct Bridge:-
Indirect bridge:-
Rochette
bridge(Macro
Mechanical Retention )

15. The Perforation Technique Presents The
Following Limitations:
1. Weakening of the metal retainer by the
perforations.
2. Exposure to wear of the resin at the
perforations.
3. Limited adhesion of the metal
provided by the perforations.

16. Maryland ridge(Micro Mechanical
retention)
 An electrolytic etching
procedure for non-precious
ceramic bonding alloys to
provide a microporous
surface that allows micromechanical
interlock with the cement
 Thinner wings and no perforations

17. Virginia bridge.(Lost Salt
Technique)(Medium Mechanical Retention)
 Roughned surface of the retainer itself
provides for retention
Achieved by lost salt technique.
Air abrasion with aluminium oxide.
This was a time saving method and
more retention is achieved compared to
the technique of etching.

18. Cast Mesh Fixed Bridge
 A net like nylon mesh is placed over lingual
surface of abutment teeth on the cast
 It is then covered by wax, with the
undersurface of the retainer becoming mesh
like when retainer is cast.

19. Principle of abutment
preparation:-
1-distinct path of insertion
2-proximal undercuts removed.
3-occlusal or cingulum rest.
4-proximal groove or slots to increase
resistance.
5-definitive supra gingival margin
established.

20. Tooth preparation
 The strength of bonding to
prepared and etched enamel is
greater than that to etched but
unprepared enamel.
Preparation should cover as large as
area as esthetically possible

21. Idealy single missing
tooth,single mesial or distal
abutment is sufficient.
Cantilever design proved
successful.
Supragingival chamfer
finishing line is perfered.
Light chamfer line is 0.1
supragingivaly.

22. Bonding steps.
Sand blasting of
metal framework.
Acid etching
Rinsing and
drying.
Contamination to
be avoided at all
cost.

23. Case
 Missing
mandibular
Right central
incisor

24. Bone loss and
gingival
recession in
abutment teeth.
Grade 1
mobility.

25. Treatment plan.
Resin bonded fixed partial denture
was the treatment of choice.
As patient wanted a fixed replacement
of the missing teeth.
Need for splinting the lower anteriors.

26. Treatment plan.
Resin bonded fixed partial denture
was the treatment of choice.
As patient wanted a fixed replacement
of the missing teeth.
Need for splinting the lower anteriors.

27. Tooth preparation

28.  Conventional
Maryland
bridge
fabricated
with porcelain
fused to metal
pontic.

29. Bonded
with
composite
resin