T-ScanⅢ应用于牙根纵裂患者咬合特征分析的初步研究  

Preliminary Study on Occlusal Characteristics Analyzed with T-Scan Ⅲ for Patients with Vertical Root Fracture

作　　者：常晓荣[1] 齐俊丽 耿瑶[1] 陈少丽[1] 范雪平[1] 刘学军[1] 

机构地区：[1]郑州大学口腔医学院,河南郑州450052

出　　处：《口腔医学研究》2017年第2期202-206,共5页Journal of Oral Science Research

基　　金：河南省医学科技攻关普通项目(编号:201403119)

摘　　要：目的:探讨牙根纵裂(vertical root fractures,VRF)发生的牙合因素。方法:应用T-ScanⅢ咬合分析仪对8例VRF患者及个别正常牙合者分别进行正中及侧方咬合记录,定量数据牙合力百分比值(tooth occlusal force percent-ages,T-FP)、双侧牙合力百分比值(two sides force percentages,TS-FP)、牙合力不对称指数(asymmetry index of occlusal force,AOF)、闭合时间(occlusion time,OT)、侧方牙合分离时间(disclusion time,DT)采用配对资料的符号秩和检验分析,定性数据早接触、牙合力中心点(center of force,COF)位置及偏移方向采用Fisher确切概率法检验分析,检验水准α=0.05,P<0.05差异有统计学意义。结果:VRF组T-FP、AOF、OT、DT大于正常对照组,差异具有统计学意义(P<0.05);2组COF位置差异具有统计学意义(P<0.05),TS-FP、早接触发生率、COF偏移方向差异无统计学意义(P>0.05)。结论:VRF患者全口牙合力分布不均衡,双侧牙合力分布不对称,牙合接触稳定性差。Objective：To analyze the occlusal characteristics in patients with vertical root fracture（VRF）using T-scan Ⅲ.Methods：The occlusal courses of 8patients with VRF and normal occlusion were recorded by T-Scan III system in intercuspal position（ICP）and lateral movement.The distribution of tooth occlusal force percentages（T-FP）,two sides occlusal force percentages（TS-FP）,occlusion time（OT）,disclusion time（DT）,and asymmetry index of occlusal force（AOF）were examined by Wilcoxon matched-pairs signed-ranks sum test.The distribution of premature contact and the position of center of force（COF）were examined by Fisher＇s Exact Test.All tests were used at two-tailed significant level 0.05.The result was significantly different when P〈0.05.Results：T-FP,AOF,OT,and DT in VRF group were more than those in the control group（P〈0.05）.There was significant difference in the COF between two groups（P〈0.05）.However,there were no significant differences on the excursion direction of COF,TS-FP,and the incidence of premature contact between two groups.Conclusion：There was unbalanced occlusion in patients with VRF.Unbalance and poor stability of occlusion contact can contribute to the occurance of VRF.

关 键 词：牙根纵裂 T-Scan 咬合特征 

分 类 号：R781.2[医药卫生—口腔医学]