Biomechanical considerations in the surgical correction of mandibular deficiency

R. A. Finn, G. S. Throckmorton, W. H. Bell, H. L. Legan

Research output: Chapter in Book/Report/Conference proceedingChapter

62 Scopus citations

Abstract

A two-dimensional model is presented that allows calculation of mechanical advantage for the human masseter and temporalis muscles. Ten patients with high-angle mandibular deficiency and vertical maxillary excess had greatly reduced mechanical advantages with an anticipated elevated muscle activity. Superior repositioning of the maxilla with mandibular advancement, however, increased the overall mechanical efficiency of the masticatory system. When compared with mandibular advancement alone, the bimaxillary procedure resulted in a 13% increase in the mechanical advantage of the temporalis muscle and a 21% increase dor the masseter muscle. This model suggests that various surgical procedures designed correct facial disharmonies may have either desirable or undesirable effects on jaw biomechanics and long-term stability. Biomechanical influences are important considerations for the clinician in planning surgical procedures to correct dentofacial deformities.

Original languageEnglish (US)
Title of host publicationJournal of Oral Surgery
Pages257-264
Number of pages8
Volume38
Edition4
StatePublished - 1980

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ASJC Scopus subject areas

  • Surgery

Cite this

Finn, R. A., Throckmorton, G. S., Bell, W. H., & Legan, H. L. (1980). Biomechanical considerations in the surgical correction of mandibular deficiency. In Journal of Oral Surgery (4 ed., Vol. 38, pp. 257-264)