TMD患者咬合板治疗后接触变化的研究

目的:比较咬合板治疗颞下颌关节紊乱病(TMD)前后异常因素的变化情况,探讨咬合板治疗TMD的机理。方法:选取34名用咬合板治疗的TMD患者,记录其戴用咬合板后2个月时的咬合特征及临床症状,并与治疗前进行比较。结果:TMD患者治疗后的力中心距中线距离减小,闭合时间与侧方分离时间明显较治疗前缩短,早接触出现率较治疗前降低,但前伸分离时间、非工作侧干扰及前伸干扰的出现率与治疗前相比无显著性差异。结论:咬合板对于纠正力中心位置、减小早接触的发生率、缩短闭合时间及侧方分离时间具有明显的作用,能够使TMD患者的关系向着更加协调、稳定的方向发展,是其有效治疗TMD的重要机理。

The study of effect of occlusal splint on changing occlusal contact characters of TMD.

Objective:To compare the effect of occlusal splint on changing occlusal contact characters and investigate the mechanism of occlusal splint therapy. Method:34 patients with TMD were treated by occlusal splint .After two month,The changes of occlual contact characters and symptom were recorded and compared with the effect before treatment. Result: The clusion time, lateral disclusion time, distance between center line and center of occlusal force of TMD decreased obviously;Compared with the effect before and after treatment, the incidence rate of the premature contact was lower, however, the lateral and protrusive balanced occlusal contacts as well as protrusive disclusion time showed no significant difference between the two groups. Conclusion:Within the limitations of this study ,the results indicated that : there was a distinct effect of occlusal splint in correcting clusion time,lateral disclusion time, incidence rate of the premature contact as well as distance between center line and center of occlusal force of TMD. It is important mechanism of occlusal splint to harmonized the occlusion of TMD.