Prosthodontics & Occlusion · single question
PRIMARY purpose of gingival retraction before impression for a crown?
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Correct answer: C. Expose the finish line margin and create space for impression material
Gingival retraction (cord, electrosurgery, laser): (1) exposes the subgingival finish line margin; (2) creates sulcular space for impression material to flow around and accurately record the margin. Without retraction: margin not captured = ill-fitting restoration.
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