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目的研究单侧后牙反牙合(UPCB)患者牙合接触特征并且探讨其与生理牙合之间的差异。方法应用T-ScanⅢ咬合分析系统记录22例单侧后牙反牙合患者(实验组)牙尖交错位,前伸及侧方牙合的咬合接触数据并与22例正常牙合者(对照组)的记录结果做对照。结果实验组牙合力中心点距中线的距离、闭合时间、前伸及侧方牙合分离时间均大于对照组(P<0.05);实验组的早接触牙合干扰出现率高于对照组(P<0.05)。结论单侧后牙反牙合患者的牙合接触特征与正常牙合者相比有明显差异,提示牙合力中心、闭合时间与牙合分离时间可以作为单侧后牙反牙合矫治的理论基础和治疗效果的参考依据。
Objective To study the characteristics of occlusal contact in patients with unilateral posterior teeth anti-obstruction (UPCB) and to explore the differences between them and physiological occlusion. Methods T-Scan Ⅲ occlusal analysis system was used to record the occlusal contact data of 22 cases of unilateral occlusal anterior crossbite patients (experimental group) with cusp position, anterior and lateral occlusion and 22 normal occlusion patients (control group ) Records the results of the control. Results The distance from the midline, the closing time, the length of anterior extension and lateral occlusion in the experimental group were significantly larger than those in the control group (P <0.05). The incidence of occlusal interference in the experimental group was significantly higher than that in the control group <0.05). Conclusion The occlusal contact characteristics of patients with unilateral posterior crossbite are significantly different from those of normal occlusion, suggesting that the center of occlusal force, the closing time and the period of occlusion may be the theoretical basis of unilateral orthodontic treatment And the therapeutic effect of the reference.