Prosthodontics & Occlusion · single question
How do you check the posterior palatal seal in a maxillary complete denture?
Show answer and explanation
Correct answer: C. Assess tissue resilience (compressibility) of the post-dam area
C) Resilience/compressibility of tissue — CORRECT.
The posterior palatal seal (post-dam) area is identified by pressing along the junction of the hard and soft palate and identifying the area of tissue resilience/compressibility. The most displaceable tissue is used for the post-dam to create the seal. This is assessed clinically by pressing with a ball burnisher along the vibrating line.
A) Viewing soft palate movement: Used to identify the vibrating line (AH line), not to check the established post-dam seal.
B) Maxillary tuberosity: A primary support area — not the posterior seal verification site.
D) Pressure indicator paste: Used to check pressure points and border seal — a useful technique but not the primary method for verifying the post-dam.
The posterior palatal seal (post-dam) area is identified by pressing along the junction of the hard and soft palate and identifying the area of tissue resilience/compressibility. The most displaceable tissue is used for the post-dam to create the seal. This is assessed clinically by pressing with a ball burnisher along the vibrating line.
A) Viewing soft palate movement: Used to identify the vibrating line (AH line), not to check the established post-dam seal.
B) Maxillary tuberosity: A primary support area — not the posterior seal verification site.
D) Pressure indicator paste: Used to check pressure points and border seal — a useful technique but not the primary method for verifying the post-dam.
Practice Prosthodontics & Occlusion questions Prosthodontics & Occlusion study notes