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MDP Monomer Function — NDEB AFK MCQ

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HardDental MaterialsMDP Monomer FunctionNDEB AFK

Which of the following correctly describes the function of the MDP (10-methacryloyloxydecyl dihydrogen phosphate) monomer in dental adhesives and cements?

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Correct answer: D — It chemically bonds to metal oxides (zirconia, base metals) and hydroxyapatite through phosphate ester groups

MDP is a functional monomer containing a polymerisable methacrylate group and a phosphate ester group. The phosphate group bonds chemically to calcium in hydroxyapatite (tooth structure) and to metal oxides on the surfaces of zirconia, base metal alloys, and alumina. This dual bonding capability makes MDP-containing adhesives and cements (e.g., Panavia, Clearfil) particularly effective for bonding to zirconia crowns, metal restorations, and tooth structure. MDP self-etch adhesives have shown excellent long-term bonding performance.

Reference: Anusavice – Phillips' Science of Dental Materials, 13th ed., 2022