PCS conventional and metal ceramic bridges Flashcards
conventional bridge
prosthesis spanning a gap in the dentition, fixed to neighbouring teeth in such a manner that it cannot be removed for cleaning
4 types of conventional bridge
- Fixed-fixed bridge
- Cantilever bridge
- Fixed-moveable bridge
- Spring cantilever bridge
conventional bridges retention
- Metal Ceramic or F.V.G.C. preparations
- Appropriate taper of the preparations on each of the abutments
- Parallelism between the same named sides of each abutment
- Height of each preparations is important
- Mechanical lute – simple
Abutment teeth should be parallel
Abutment same named preparation sides must be parallel (i.e. parallelism exists between same named sides of each preparation)
what type pontic
modified ridge lap pontic
what type pontic
sanitary/wash through pontic
solution for the problem of tilted teeth
Retainers with separate paths of insertion
The bridge is united by a moveable connector
FIXED-MOVEABLE BRIDGE
describe this
Gold core on tooth 12 parallel to preparation on tooth 21
Metal ceamic fixed-fixed bridge
- retainers teeth 12, 21; pontic 11
describe this
metal ceramic cantilever bridge
retainer tooth 13
pontic 12
describe two bridges here
Conventional metal ceramic cantilever bridges – anterior and posterior
- Retainer 23, pontic 22 (modified ridge lap)
- Retainer 25, pontic 24 (modified ridge lap)
describe this
metal ceramic cantilever bridge
retainers 11, 21
pontic 12
(retainers joined together)
describe bridge design here
- 22 MC retainer with a distal moveable connector (retained by a cast gold post and core)
- 25, 26 MC fixed retainers (joined together)
- Pontics 23, 24
consequence of bridgework seen in radiographs
bone loss around retainer roots
