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- 2017
T-ScanⅢ应用于牙根纵裂患者咬合特征分析的初步研究
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Abstract:
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
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