Pontic Design For Metal Ceramic Bridge Should Quizzn
Pontic serves to restore the mastication speech to maintain tooth relationships both interarch and intra arch and also to satisfy patients esthetic and psychological needs by eliminating the space in dentition.
Pontic design for metal ceramic bridge should quizzn. Allow for complete coverage of the metal by the porcelain. The pontic is firmly attached to a retainer at one end of. Fixed movable bridges have a major retainer at one end of the pontic. Selection criteria for pontic and pontic designs.
All metal hygienic pontic fabrication 55. Allow for complete coverage of the metal by the porcelain. All metal hygienic pontic fabrication 54. Pontic or the artificial crown derives its name from a latin word pons which means bridge.
A metal ceramic posterior fixed partial denture pontic should a be constructed to have an occlusal surface one quarter the width of the tooth it replaces. Metal ceramic systems that have a difference in the coefficients of thermal expansion metal minus ceramic of 0 5 10 6 c or less are acceptable. Pontic design for a metal ceramic bridge should 1. Metal ceramic pontics requirements adequate bulk of metal uniform thickness of porcelain continuous strip of metal on lingual surface 56.
C cover as much mucosa as possible. Each part of the bridge should be designed individually but within the context of the overall design. For resin bonded bridges the pontic should have light contact in intercuspal position icp. Evidence to support or refute the effectiveness of ceramic materials for fixed prosthodontic treatment over metal ceramic.
Minimum thickness of connector for the posterior bridge should be 2 5 mm occluso gingivally and 2 5 mm bucco lingually. All metal hygienic pontic fabrication 53. All metal hygienic pontic fabrication 52. 1 2 3 all of the above.
Provide for a rigid restoration. Control thermal conductivity 4 only all of the above 1 2 3 1 and 3 2 and 4. 2 and 4 4 only 1 and 3. However wherever possible the maximum thickness of metal should be used commensurate with the maintenance of gingival health.
It must be easily cleaned. B be constructed to have an occlusal surface wider than the width of the tooth it replaces. Place the porcelain metal joint away from the soft tissues. This design of bridge has been superseded.
D provide adequate embrasure spaces. According to some experiments it seems as if a somewhat higher difference up to 0 75 10 6 c can be used without the risk of cracks or fractures in the ceramic. A metal ceramic pontic must fulfill certain requirements. Retainers major or minor fixed fixed cantilever and spring cantilever bridges have only major retainer s.
Place the porcelain metal joint away from the soft tissues. Dental bridges are used to hide the gap a missing tooth leaves behind. Pontic design for a porcelain fused to metal bridge should 1.