Restorative & Materials · single question

When preparing a tooth with minimal remaining coronal structure for a full gold crown, which design feature helps improve mechanical retention and resistance form?

Adding retention grooves (e.g., on the lingual surface) to compensate for inadequate height/taper
Increasing the occlusal convergence angle as much as possible
Eliminating all line angles entirely
Reducing the axial wall height further

Show answer and explanation

Correct answer: A. Adding retention grooves (e.g., on the lingual surface) to compensate for inadequate height/taper

When a tooth preparation has compromised height or excessive taper due to minimal remaining structure, adding auxiliary retention features such as grooves, boxes, or pins (commonly placed on surfaces like the lingual) helps compensate for otherwise inadequate mechanical retention and resistance form for the planned full-coverage restoration.

Practice Restorative & Materials questions Restorative & Materials study notes

When preparing a tooth with minimal remaining coronal structure for a full gold crown, which design feature helps improve mechanical retention and resistance form?

More Restorative & Materials practice questions