Abstract
One of modern dental materials for crown restoration which is superior to other materials in esthetics and materials and bio-compatibility, is castable glass ceramics.
We have been made basic and clinical studies on one of castable glass ceramics, Dicor, which is developed by Corning Glass Works and Dentsply International Inc.
The stress analysis of the glass ceramic crown on upper central incisor and lower first molar under normal and abnormal functional condition was studied by Finite Element Method.
The following results were obtained by this study:
(1) The glass ceramic crown on both tooth is able to withstand normal functional condition.
(2) But it is not able to withstand parafunctional condition, such as stomatognathic dysfunction or bruxism.
(3) Compare with metal ceramic crown or metal cast crown, the stress concentration of the glass ceramic crown is relieved, because of the thickness of veneering material.
