Light cure composite resin combined with radicular retainers was applied for repe sucess rate in 2, 3, 5 and 8 years was 100%, 88. 89%, 78. 57% and 66. 67 % respectively.

• 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%25、88。89%25、78。