磨牙症牙合因素的光牙合研究

A PHOTOCCLUSAL STUDY OF THE OCCLUSAL FACTORS IN BRUXISM

目的：进一步探讨牙合因素与磨牙症的关系。方法：采用计算机光牙合图像分析系统对３４例磨牙症患者的牙合接触状况进行定量研究。结果：２９例患者存在牙合接触力分布的异常，占受试者的８５．３％。牙合异常的主要表现为前牙区牙合接触力过大（１５例）、前磨牙区牙合接触力过大（９例）及牙弓两侧牙合接触力分布明显不对称（５例）。结论：牙合因素与磨牙症之间存在一定的关系，其中前牙区或前磨牙区出现过大的牙合接触力应引起重视。

Objective: To further approach the relationships between the occlusal factors and bruxism. Methods: The occlusal contact conditions of 34 patients with bruxism were studied quantitatively by a computer aided photocclusal analysis system. Results: Abnormal occlusal contact force distribution was found in 29 cases, accounted for 85.3 percent of the total 34 patients. It expressed as excessive occlusal contact force in anterior teeth in 15 cases, excessive occlusal force in premolar teeth in 9 cases and significant unbalanced contact force distribution between the two sides of the dental arc in 5 cases. Conclusion: The results indicate that there are certain relationships between the occlusal factors and bruxism. And more attentions must be paid to the excessive occlusal contact force in anterior or premolar teeth. By the computer aided photocclusal analysis system, the occlusal contact condition can be evaluated accurately, objectively and quantitatively.