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

Question 1

On the NDECC Clinical Skills Component, you prepare a Class II amalgam cavity on a mannequin molar. Regarding the cavosurface margin of the proximal box for amalgam, which configuration best resists marginal breakdown?

A cavosurface margin of approximately 90 degrees (a butt-joint) A beveled cavosurface margin of about 45 degrees A feathered margin extending to less than 0.5 mm thickness An acute cavosurface margin under 70 degrees to maximize retention

Correct Answer:

A cavosurface margin of approximately 90 degrees (a butt-joint)

Question 2

When preparing a Class II amalgam on a mannequin tooth for the NDECC, what is the recommended minimum occlusal isthmus depth (pulpal floor depth) measured from the cavosurface margin?

1.5 to 2.0 mm 0.5 mm 3.5 mm 5.0 mm

Correct Answer:

1.5 to 2.0 mm

Question 3

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

Question 4

You are condensing amalgam into a Class II preparation. Inadequate condensation most directly increases the risk of which clinical problem?

Excess mercury and increased porosity, weakening the restoration Galvanic shock with an adjacent gold crown Delayed expansion from moisture contamination Reduced creep of the set amalgam

Correct Answer:

Excess mercury and increased porosity, weakening the restoration

Question 5

A zinc-containing dental amalgam is contaminated by moisture (saliva or blood) during condensation. What characteristic clinical complication is most associated with this error?

Delayed expansion causing pain, marginal protrusion, and possible fracture Immediate setting and inability to carve Permanent green discoloration of the restoration Rapid loss of mercury and a chalky surface within minutes

Correct Answer:

Delayed expansion causing pain, marginal protrusion, and possible fracture

Exam overview

About this Exam

Prepare with the NDECC Practice Questions - NDEB Equivalency Process Clinical Competence (NDECC) Exam practice quiz. This question bank includes 100 questions covering patient, crown, clinical, margin, and class. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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

This practice set contains 100 questions from the matching question bank and focuses on patient, crown, clinical, margin, and class. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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

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