关键词: ［关键词］嵌入性脱位 , 年轻恒前牙 , 复位 , 固定, ［key words]Intrusive Iuxation, Young anterior teeth, Reposition, Stabilize

Abstract: ［Abstract］ Objective To study the clinical efficacy of reduction and fixation of the traumatic embedded dislocation of young permanent anterior teeth. Methods 39 embedded dislocated young permanent teeth selected from 26 cases from August 2009 to June 2012 were set as the treatment group and they were treated according to the properties of different types. (1)When the embedded depth was ≤ 2mm,the teeth were reset to the original intercuspal position and fixed;(2)When the embedded depth was＞2mm , and there were multiple fractures in alveolar fossa and the loosening of teeth, the teeth were fixed in situ; 3)When the embedded depth was＞2mm ,and the teeth were locked in alveolar cavity and there was no loosening, the teeth were reset 1mm and then fixed.41 embedded dislocated young permanent teeth were fixed in situ and set as the control group. Results After 1 and half years of clinical observation, the retention rate of the treatment group was about 87.18% and the vital pulp rate was 43.59% while the rates in control group were respectively 58.54% and 24.39%. The retention rate and the vital pulp rate in treatment group were obviously higher than in control group. Conclusion Adopting different methods of reduction and fixation according to different embedded depths and the surrounding alveolar bone is a more effective way to treat the traumatic embedded dislocation of young permanent anterior teeth. It can more effectively keep the teeth and the vital pulp.