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Z-plasty

(zēplăs′tē)
n.
  1. A surgical procedure to elongate a contracted scar or to rotate tension 90°, in which the middle line of the Z-shaped incision is made along the line of greatest tension or contraction, and triangular flaps are raised on opposite sides of the two ends and then transposed.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.