Class V Matrix Selection — ORE Part 1 MCQ

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EasyRestorative DentistryClass V Matrix SelectionORE Part 1

A patient requires a composite restoration for a vital Class V cavity on the labial surface of an upper canine. The gingival margin extends 1 mm subgingivally. Which matrix is most appropriate?

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Correct answer: C — Contoured transparent cervical matrix strip

**A is correct.** A contoured transparent cervical matrix strip is suitable for a labial Class V composite restoration, particularly where the cervical margin needs support and contour. Cervical matrices are used in clinical Class V restorative procedures and are compatible with routine UK operative practice. ([pubmed.ncbi.nlm.nih.gov](https://pubmed.ncbi.nlm.nih.gov/12165991/?utm_source=openai)) A Tofflemire band and a sectional matrix with separation ring are designed primarily to recreate posterior proximal contacts in Class II restorations, not to contour an anterior cervical labial cavity. A copper band is mainly associated with full-crown-type banding and is inappropriate for this localised composite restoration. An Ivory retainer is a retainer system for matrix bands, again principally relevant to posterior circumferential matrix use rather than an anterior Class V lesion.

Reference: Ermiş RB. Two-year clinical evaluation of four polyacid-modified resin composites and a resin-modified glass-ionomer cement in Class V lesions. Quintessence International, 2002. https://pubmed.ncbi.nlm.nih.gov/12165991/