NDECC Practice Questions - NDEB Equivalency Process Clinical Competence (NDECC) Exam

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During a Class II amalgam preparation, the proximal box walls should diverge slightly toward the surface so the gingival margin is the narrowest. What is the primary purpose of this gingival-to-occlusal divergence?

To conserve marginal ridge enamel and avoid undermining adjacent enamel To increase retention form against occlusal dislodgement To allow a thinner matrix band To eliminate the need for a retention groove

Correct Answer:

To conserve marginal ridge enamel and avoid undermining adjacent enamel

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