238例后牙冠根纵折的临床分析

Clinical Analysis on 238 Cases of Longitudinal Fracture of Posterior Teeth

目的 研究后牙冠根纵折的特点和临床表现 ,客观评价最佳的治疗和预防措施。方法 回顾 2 38个后牙冠根纵折病例 ,归纳发病年龄与性别、好发牙位和诱发因素。拔除患牙 10 8例 ;作保存治疗 130例。结果 后牙冠根纵折好发于 30～ 5 9岁 ,男女之比为 4:3,上颌第一磨牙最多见 ,作过髓病治疗的银汞合金充填者最易发生。作保存治疗的 130例中 ,随访 2～ 5a的 83例 ,成功 75例。结论 经早期固定 ,冠根纵折是可以治愈的。避免非功能咬合、积极诊治隐裂牙及合理的牙髓病治疗是预防的有效措施。

Objective To investigate the characteristics and clinical features of the longitudinal fractures of posterior teeth and evaluate the therapeutic methods.Methods The records of 238 cases with the longitudinal fractures of posterior teeth were analyzed retrospectively. The clinical features were summed up. Eextractions of teeth were performed in 108 patients, and the conservative therapies in 130.Results The incidence of longitudinal fractures of posterior teeth was highest in the 30 59 years. The rate between male and female was 4:3. The longitudinal fractures of posterior teeth most occurred in the first molar of the maxilla with endodontic treatment. The follow up peroid was more than 2 years in 83 cases. The success rate was 75/83. Conclusion The longitudinal fractures of posterior teeth can be cured by early fixation, and prevented by avoiding dysfunctional bite, treating subclinical fracture, and using proper methods of treatment of endodontics.