牙隐裂患者咬合特征及牙体磨耗特点的临床观察  

Clinical observation on the characteristics of occlusion and tooth abrasion in patients with cracked tooth

作　　者：陈宇[1] 林正梅[1] 凌均棨[1] 

机构地区：[1]中山大学光华口腔医学院附属口腔医院牙体牙髓科中山大学口腔医学研究所,广东广州510055

出　　处：《中华口腔医学杂志》2009年第9期520-523,共4页Chinese Journal of Stomatology

基　　金：2007-2009年度卫生部部属（管）医院临床学科重点项目[卫规财函（2007）353号].

摘　　要：目的分析牙隐裂患者的咬合特征，观察牙隐裂患牙的牙体磨耗情况，以期从骀学角度探讨牙隐裂的病因及咬合异常、牙体磨耗与牙隐裂之间的关系。方法选择27例牙隐裂患者的27颗患牙作为受试对象，应用T-ScanⅢ咬合分析仪对其进行正中、侧方及前伸咬合记录，以27颗牙隐裂患牙为牙隐裂组，患牙毗邻的健康牙为正常对照组，分析两组的早接触、胎干扰、患者骀力中心位置等咬合特征，并按照牙体磨耗的Smith分级标准记录牙隐裂组与正常对照组的牙体磨耗程度并进行比较。结果牙隐裂组存在骀干扰的牙数（20颗）多于正常对照组（6颗），差异有统计学意义（OR=5.67，X^2=8.45，P=0.003）。24例单颗牙牙隐裂患者中牙尖交错位时[牙][合]力中心位于内侧椭圆以内和外侧椭圆以内（包含内侧椭圆）的分别为6例（25％）和18例（75％），经Z检验两者与正常对照组相比差异均有统计学意义（Z1=4.53，Z2=4.55，P〈0.05）。牙隐裂组中有侧方[牙][合]干扰的隐裂患牙存在牙体磨耗的比例高于无侧方[牙][合]干扰隐裂患牙，差异有统计学意义（X^2=4.79，P=0.029）。结论本组患者牙隐裂的发生与咬合异常有关，与牙体磨耗相关。Objectives To investigate the occlusal characteristics and the condition of tooth abrasion in patients with cracked tooth and to discuss the etiology of the cracked tooth and the relationships between occlusal disorder, tooth abrasion and cracked tooth. Methods Twenty-seven patients with cracked tooth were selected. The occlusal courses were recorded by T-Scan Ⅲ system in intercuspal position, protrusive movement and lateral movement. Teeth with cracked tooth were regarded as the cracked tooth group, and the healthy adjacent teeth as the control group. The distribution of premature contact, occlusal interference, the center of occlusal force were examined. The abrasive conditions of the two groups were recorded according to the Smith tooth wear index and compared. Results There were more teeth with occlusal interference in cracked tooth group （20 teeth ） than in the control group （6 teeth ）, which was significantly different （OR = 5.67, X^2=8.45, P =0.003）. In 24 patients with single affected tooth, the center of occlusal force（COF） located in the inside and outside ellipse were 6 teeth （25%） and 18 teeth （75%） respectively, Z test showed that there were statistical differences between the cracked tooth group and normal people. In cracked tooth group, the proportion of the teeth with abrasion was higher in teeth with occlusal interference than those without occlusal interference （X^2=4.79, P=0.029）. Conclusions The formation of the cracked tooth was related to the occlusal disorder and associated with the tooth abrasion.

关 键 词：牙裂综合征 牙磨耗 咬合接触 

分 类 号：R686[医药卫生—骨科学]