Prosthodontics & Occlusion · single question
When taking a final impression for a complete denture, what action should the patient perform?
Show answer and explanation
Correct answer: A. Pucker their lips tightly against the tray
A) Puckering the lips — CORRECT.
During final impression for a complete denture, the patient is instructed to pucker (protude) their lips to capture the full depth and width of the labial vestibule and functional border. This "border molding" movement records the functional shape of the peripheral tissues so the denture borders are properly extended without overextension.
B) Opening wider: Captures lateral/posterior border extension but mouth wide open is for different borders — not the primary instruction for labial borders.
C) Avoiding puckering: Incorrect — puckering is an intentional functional movement to capture labial border.
D) Biting firmly: Would distort the impression material — not appropriate.
During final impression for a complete denture, the patient is instructed to pucker (protude) their lips to capture the full depth and width of the labial vestibule and functional border. This "border molding" movement records the functional shape of the peripheral tissues so the denture borders are properly extended without overextension.
B) Opening wider: Captures lateral/posterior border extension but mouth wide open is for different borders — not the primary instruction for labial borders.
C) Avoiding puckering: Incorrect — puckering is an intentional functional movement to capture labial border.
D) Biting firmly: Would distort the impression material — not appropriate.
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