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Dentistry · Restorative dentistry
Sample itemWhy is matrix band placement used during a proximal composite restoration?
Original practice item, not a recalled exam question. Nothing here is recorded.
The answer and the reasoning
D. Recreate contour and contact with adjacent tooth
A matrix band provides a temporary wall that helps shape the proximal surface and establish a contact point while restorative material sets.
Option by option
A. Assess occlusal nerve supply
Nerve supply is not assessed here.
B. Measure periodontal pocket depth
Pocket depth needs a periodontal probe.
C. Sterilize cavity preparation
Sterility is not achieved by the band.
D. Recreate contour and contact with adjacent tooth (correct)
Correct: matrix forms proper proximal anatomy.
Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.
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