All-Ceramic Bridge — ORE Part 1 MCQ

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HardProsthodonticsAll-Ceramic BridgeORE Part 1

A patient requires replacement of a single maxillary anterior tooth with a conventional three-unit, tooth-supported all-ceramic fixed dental prosthesis. Both abutment teeth are vital and unrestored, there is adequate occlusal clearance, and there is no history of bruxism. Which ceramic system is the most appropriate?

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Correct answer: E — Zirconia framework veneered with porcelain

Explanation lettering: E = shown as A · A = shown as E

A is correct. A zirconia framework veneered with porcelain is the established all-ceramic choice among these options for a conventional three-unit anterior FDP: zirconia supplies framework and connector strength, while the veneer improves anterior aesthetics. Systematic-review evidence specifically includes mainly three- to five-unit tooth-supported zirconia FDPs and reports acceptable five-year survival; porcelain chipping is a known limitation, not a reason to select a weaker framework. Leucite-reinforced glass ceramic is principally suitable for single-unit restorations rather than a conventional multi-unit FDP. Alumina frameworks have historical use but are less favourable than zirconia for this indication. Feldspathic porcelain lacks the strength for a conventional bridge framework. Fibre-reinforced composite is not an all-ceramic conventional fixed bridge system.

Reference: Le M, Papia E, Larsson C. The clinical success of tooth- and implant-supported zirconia-based fixed dental prostheses: a systematic review. Journal of Oral Rehabilitation. 2015. https://pubmed.ncbi.nlm.nih.gov/25580846/