后牙折裂发病及危险因素的临床研究

Clinical investigation of risk factors of posterior tooth fracture

目的初步分析后牙折裂的特征及其危险因素。方法对江苏省口腔医院2009年9月-2011年9月期间牙体牙髓病科记载完整的、临床结合X线片检查确诊为牙折的后牙折裂病例,进行有关指标的统计和分析。结果 252例患者(男130例,女122例)共252颗牙齿(前磨牙57颗,磨牙195颗)。从年龄段看,18～44岁、45～59岁、>60岁分别为:82、90、80例。从折裂牙位看,上颌第一磨牙折裂最多(88/252),下颌第一前磨牙最少(2/252);从折裂类型看,冠折、根折及冠根折分别为89、19和144例;从诱因看,明确有咬硬物史的136例(53.97%)最多,可疑89例(35.32%)次之,否认咬硬物史者27例(10.71%)最少;从牙髓治疗状况看,活髓牙多于无髓牙多于死髓牙(P<0.05)。结论磨牙和活髓牙所占比例高,折裂多牵扯牙冠,牙折与咬硬物有关。尚未看出性别、年龄与牙折的关系。

Objective To investigate the characteristics of posterior tooth fracture and the risk factors preliminarily.Methods Analyze relevant indicators of cases that were diagnosed to have posterior tooth fracture clinically with X-ray from Department of Endodontics in Stomatological Hospital of Jiangsu Province during Sep.2009 to Sep.2011.Results 252 teeth（57 premolars and 195 molars）of 252 cases（130 males and 122 females）were involved.The numbers of people in 18~44,45~59 and 〉60 age groups were close to each other（82,90,80）.The fracture of posterior teeth most occurred to the maxillary first molars（88/252）,and least to the mandibular first premolars（2/252）.The numbers of crown fracture,root fracture and crown-root fracture were 89,19 and 144 respectively.53.97% of the cases clearly mentioned a history of biting hard objects.The number of the teeth with vital pulp was more than pulpless tooth and Necrotic pulp teeth（P〈0.05）.Conclusions Molars and teeth with vital pulp took up high proportions of fractured teeth,fracture often involved crowns,and there was a history of biting hard objects.No significant relationship among gender,age and tooth fracture was found.