THE RESPONSE OF HUMAN PREMOLARS TO CYCLIC LOADING

The aim of the study was to obtain data on the dynamic strength of bot h intact and prepared premolars for partial veneer crowns. Cyclic load ing was performed in a modified Amslers high-frequency pulsator with v arying force (between 400 and 1400 N). The greatest dynamic strength w as exhibited by the intact samples. The greater the load the fewer the cycles necessary to fracture the tooth. A stastically significant dif ference was found (P < 0.05) between the magnitude of cyclic loads and the different types of specimens tested.