INBDE (Integrated National Board Dental Examination) Practice Exam

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Ace your INBDE with our comprehensive practice exam. Featuring detailed explanations, interactive flashcards, and a wide array of multiple-choice questions designed to mirror the real test. Get ready to surpass your expectations!

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What is the ratio of bound to unbound surfaces known as?

C-factor
D-factor
B-factor
A-factor

The correct answer is: C-factor

The ratio of bound to unbound surfaces is known as the C-factor. This factor represents the ratio of the bonded (or constrained) surfaces in a cavity preparation to the unbonded (or freely contracting) surfaces. It is an important consideration in restorative dentistry as it influences the polymerization shrinkage stress and the potential for the development of gaps or marginal discrepancies in the restoration. Options B, C, and D are not correct as they do not specifically refer to the ratio of bound to unbound surfaces in dental restorations.