274人的370个前牙、前磨牙进行去髓术,随机分为一次法、二次法两组。术后一年复查150人的215个牙,一次法成功率为91.26％,二次法为91.96％,二者疗效无统计学上差异。两组基本上无术后反应,疗效与病因、病理、根管充填程度、修复方式等无明显关系。结果表明去髓术一次法一般可代替二次法。 274 people of 370 anterior teeth, premolar pulp surgery, were randomly divided into primary and secondary methods of two groups. A year after the review of 215 215 teeth, a successful rate was 91.26%, the second method was 91.96%, the two were no statistically significant difference in efficacy. There was almost no postoperative reaction between the two groups. The curative effect was not related to the etiology, pathology, filling degree of root canal and the way of repair. The results show that one-time demyelination method can generally replace the quadratic method.