Abstract
The sports of teeth and jawbone might be connected directly with an eating disorder, a speech trouble, and appreciation of the beautiful injury. It may be not sufficient for preventing sports injury while the mouth guard is defense apparatus to prevent the injuries. Therefore, it is necessary to analyze the injury mechanism of the sports player with the mouse guard which is designed based on the experience of dentists and players. In this research, the functional effect of mouth guard to protect teeth under static loading condition was analyzed by FEM. Some results were shown to discuss the clinical and dental applicability.