[Study on experimental cervical defect of human tooth by SEM].
Experimental cervical defects on 12 pairs of premolar caused by cross-brushing, erosion and occlusal force separately or together were observed under SEM Changes on the surface of cervical defects suggested that the defects were induced by the above three factors combined. It was interesting that various kinds of microcracks were noticed on sections of enamel and dentin at the cervical defect areas made by mimicking occlusal force combined with other factors. The results seemed to indicate that the occlusal force would play an important role on formation of the cervical wedge-shaped defect and that accumulation of the stress caused the hard tissue injured and microcracked.
Wang
J
J
School of Stomatology, Beijing Medical University.
Smith
B G
BG
D000293:Adolescent; D000328:Adult; D001641:Bicuspid / Q000293:injuries* / Q000648:ultrastructure*; D002648:Child; D006801:Humans; D008855:Microscopy, Electron, Scanning; D008875:Middle Aged; D019237:Tooth Cervix / Q000293:injuries* / Q000648:ultrastructure*