A. Adjacent tooth is the fulcrum
B. Tooth is isolated
C. Interdental bone is fulcrum
D. Adjacent tooth is not to be extracted
The correct answer is C. Interdental bone is fulcrum.
Straight elevator (Coupland, London Pattern) is the most commonly used. Usually used to luxate and elevate mandibular third molar and when multiple extractions are needed. It is not recommended in upper arch. This utilizes principle of lever mechanism. Alveolar crest acts as fulcrum. Adjacent teeth should never be used as fulcrum.
CLICK HERE FOR MORE MCQs
No comments:
Post a Comment
Add Your Comments or Feedback Here