# Finish lines of a complete coverage crown should lie?
a) Supragingivally
b) Subgingivally
c) Subgingival if required
d) Gingival margin
The correct answer is C. Subgingival if required.
Whenever possible the finish lines of crowns should terminate supragingivally. Subgingival margins are required in the following situations.
• Esthetics.
• Cervical erosion and caries.
• Insufficient crown length for retention.
• Elimination of persistent root hyper sensitivity.
No comments:
Post a Comment
Add Your Comments or Feedback Here