238例后牙冠根纵折的临床分析

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Clinical Analysis on 238 Cases of Longitudinal Fracture of Posterior Teeth

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.