Bulk-Fill Composite Depth — MFDS Part 1 MCQ
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Correct answer: C — 4–5 mm
The correct answer is C: 4–5 mm. Bulk-fill resin composites are formulated to permit greater light penetration and depth of cure than conventional resin composites, allowing many products to be placed in approximately 4–5 mm increments. The curing-light irradiance, exposure time, shade and maximum increment stated by the manufacturer must still be followed because performance is material-dependent. A 2 mm increment is the traditional limit associated with conventional light-cured composite rather than the defining bulk-fill technique. Increments of 0.5 mm or 1 mm are unnecessarily thin for routine bulk-fill placement. Although exceptional materials may have different manufacturer claims, 8–10 mm is not the generally applicable increment range for light-cured posterior bulk-fill composites.
Reference: Menezes AJO et al. Clinical Outcomes of Bulk-Fill Resin Composite Restorations: A 10-Year Mapping Review and Evidence Gap Map. Journal of Esthetic and Restorative Dentistry. 2025;37(4):920–933. https://pubmed.ncbi.nlm.nih.gov/39462873/