What is the PRIMARY reason for border molding in complete denture fabrication?

To determine the posterior palatal seal
To record the functional extent of the vestibule and muscular movements at the denture borders
To assess denture retention
To establish occlusal vertical dimension

Show answer and explanation

Correct answer: B. To record the functional extent of the vestibule and muscular movements at the denture borders

A. Incorrect. The posterior palatal seal is established separately from border molding.
B. Correct. Border molding (muscle trimming) captures the functional movements and extent of the VESTIBULAR FORNIX — recording muscle, frenum, and soft tissue activity to ensure proper flange extension (neither overextended nor underextended).
C. Incorrect. Border molding indirectly affects retention but is not performed to 'assess' it.
D. Incorrect. Occlusal VD is recorded with occlusal rims and clinical measurements.

More Prosthodontics & Occlusion practice questions