Ceramic Cementation — MFDS Part 1 MCQ

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HardDental MaterialsCeramic CementationMFDS Part 1

A minimally invasive anterior restoration has no axial walls and will be retained principally by bonding to enamel. The restorative material must be a silica-containing ceramic whose fitting surface can be conditioned with hydrofluoric acid and silane before resin cementation. Which restoration best meets these requirements?

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Correct answer: C — Lithium disilicate laminate veneer

A lithium disilicate laminate veneer is dependent on adhesive cementation because its minimally retentive preparation provides little conventional resistance or retention form. Lithium disilicate is a silica-containing glass-ceramic: its fitting surface can be conditioned according to the manufacturer's protocol, commonly using hydrofluoric acid followed by silane or a suitable ceramic primer, and bonded with resin cement. Zirconia is not predictably conditioned by hydrofluoric acid and silane; adhesive zirconia protocols instead generally use micromechanical treatment and an MDP-containing primer or cement. Porcelain-veneered zirconia, metal-ceramic and full gold crowns can obtain substantial retention from a conventional full-crown preparation. A cast metal post and core is likewise not an etchable glass-ceramic restoration. Importantly, a retentive full-coverage lithium disilicate crown does not invariably require adhesive cementation.

Reference: Alenezi A et al. Clinical performance of laminate veneers: A review of the literature. Journal of Prosthodontic Research. 2024. https://pubmed.ncbi.nlm.nih.gov/35282935/