resin retained bridges Flashcards
(21 cards)
What is a resin retained bridge?
A conservative and usually aesthetic approach to restore a one unit space
Bridges typically last 8-9 years.
how long do resin retained bridges tend to last?
8-9yrs
What is a disadvantage of fixed-fixed compared to cantilever resin retained bridges?
Fixed-fixed bridges can have a retainer de-bond without notice.
which have a better survival rate fixed-fixed or cantilever resin retained bridges? why?
cantilever bridges have a better survival rate due to a single retainer on a tooth with larger surface area
on a cantilever resin retained bridge where is the single retainer placed?
on the tooth with the larger surface area
What is the design of a Rochette bridge?
has holes in metal retainers for mechanical retention
Used for immediate temporization in patients undergoing single tooth implant retained restorations.
advantage of rochette bridge
Simple to remove
when are rochette bridges used?
Used for immediate temporisation for pt undergoing single tooth implant retained restorations
name this type of resin retained bridge
rochette bridge
how is a Maryland bridge treated?
The inner surface of the metal retainer is electrolytically etched for micromechanical retention
disadvantage of the Maryland bridge
etch pattern is unpredictable and easily damaged.
how is the current resin retained/bonded/adhesive bridge treated?
Metal retainer sandblasted with 50 micrometre alumina particles
What is used to bond the current resin retained/bonded/adhesive bridge?
uses Panavia resin for bonding which is Quick, easy and predictable so can be done after the try in stage
The bonding is due to phosphate monomer and is dual cure, thin, and radio opaque insoluble.
can panavia resin chemically and micro mechanically bond to metal and enamel?
yes
advantages of panavia 4
Dual cure, thin, radio opaque, insoluble
List the indications for a resin retained bridge. 7
- Unrestored or minimally restored abutment teeth
- Sufficient good quality enamel on abutment teeth
- Sufficient interocclusal space
- Good alveolar bone shape
- Temporary prior to implant retained superstructure
- Completes a shortened dental arch (4-4)
- As a space retainer
What are 3 designs of resin retained bridges?
- Cantilever
- Fixed-fixed
- Hybrid
in DDH what is the tooth preparation for resin retained bridges?
- Cingulum rest seat for location
- Sometimes gingival finish line - cervical chamfer
- Removal of undercuts on palatal/lingual aspect
- Occlusal rests for direct force application
What should be done to amalgam restorations when preparing for resin-retained bridges?
Change any amalgam restorations to composite to reduce leakage.
What is an advantage of the fibre-reinforced bridge?
It offers aesthetic advantages and may be formed intra-orally chairside.
True or False: There is long-term clinical research supporting the use of fibre-reinforced bridges.
False
No long-term clinical research is available.
