Structural Behavior of the Maxilla Under Lateral Load Application

Abstract

This study was initiated to obtain quantitative information on the tendency of the maxilla to resist separation when subjected to lateral loads. It was hoped that a structural center of resistance for the maxilla could be determined. Strain gauges were placed in dry skulls and lateral loads were applied in five different anterior-posterior positions. The results show a highly significant position by gauge interaction (F= 3.467, P. < .005). A loading position at approximately the mesial of the first molar elicited the least variable (or most uniform readings), thereby indicating the approximate center of resistance of the maxilla to force application in the plane considered.