flap operation

n.
  1. flap amputation
  2. In dental surgery, the detachment of a portion of the mucoperiosteal tissues from an underlying bone or impacted tooth for better access and visibility in examining the area covered by the tissue.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.