pyramidal fracture

n.

A fracture of the midfacial bones, especially the upper jawbone, in which the principal fracture lines meet at a point above the nasal bones, forming a triangular section that is detached from the skull.LeFort II fracture
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.