联合应用光固化复合树脂和根管固位钉对40例44只自体折断牙冠进行粘接复位。结果：2年、3年、5年和8年的临床成功率分别为100％、88．89％、78．57％和66．67％。说明该方法近期疗效较佳，远期疗效有所下降。作为省时、经济、自然美观等优点。自体断牙再接术值得临床应用。 Forty-four patients with 44 fractured crowns were treated with light-cured composite resin and root canal retention screws. Results: The clinical success rates at 2 years, 3 years, 5 years and 8 years were 100%, 88.89%, 78.57% and 66.67% respectively. This method shows that the recent better curative effect, long-term efficacy declined. As a saving time, economy, natural beauty and so on. Self-broken teeth and then worthy of clinical application.