Histologic Features of the Superior Labial Frenum

Abstract

Histologic examination was performed on the superior labial frenum obtained from 11 fresh biopsy and three autopsy specimens. The frena contained considerable dense collagen, loose connective tissue and elastic fibers. There were no muscle fibers in any of the frenum sections except the autopsy specimens, where it was seen in the vestibular tissue but not in the frenum proper.