目的观察上颌双尖牙纵折后保存治疗的临床疗效。方法30例42个纵折双尖牙,经根管治疗后行全冠修复。结果本组病例经2年随访,临床有效率为92.5%,较好地保存了患牙。结论纵折的双尖牙经完善的根管治疗后行全冠修复,较好地保存了患牙,恢复了咀嚼功能。 Objective To observe the curative effect of maxillary bicuspid tooth preservation and treatment. Methods Twenty-four patients with longitudinal fold bicuspidus were treated with total crown restoration after root canal treatment. Results The patients were followed up for 2 years, the clinical effective rate was 92.5%, better preserved teeth. Conclusion Longitudinal bicuspid canals can be restored with full crown after root canal treatment, which keeps the teeth well and restores the chewing function.