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[目的]评价百强固位纤维用于上切牙外伤后松牙固定的临床效果。[方法]选择60例上中切牙及侧切牙外伤病例，按门诊就诊顺序随机分为两组（每组30例），分别采用百强固位纤维（试验组）与弓丝托槽（对照组）技术固定。统计两组固定前及固定后4周患者舒适指数、材料脱落牙位数、有效固定牙位数并进行统计学分析。[结果]试验组患者舒适指数显著优于对照组（16．3±1．985vs8．2±1．357），差异有显著性（t＝2．753，P＜0．05）；两组之间的有效固定率、材料脱落牙位数差异无统计学意义（ P ＞0．05）。[结论]百强固位纤维应用于上切牙外伤松动牙固定效果可靠，具有良好的舒适效果，是一种理想的牙周夹板。“,”[Objective]To evaluate the clinical efficacy of Biosplint retention fiber used in teeth ligation af-ter agomphiasis caused by upper incisor tooth trauma .[Methods] According to the visit order of outpatients , 60 cases of upper ,middle and lateral incisor tooth trauma were chosen and randomly divided into Biosplint re-tention band group(experimental group ,n=30) and orthodontic wire and bracket group(control group ,n =30) .Comfortable index ,tooth number of material defluxion and effective fixation before and 4 weeks after fix-ation were compared between two groups .Statistical analysis was taken .[Results]The comfortable index of experimental group was much better than control group(16 .3 ± 1 .985 vs 8 .2 ± 1 .357) ,and there was signifi-cant difference( t = 2 .753 ,P 0 .05) .[Conclusion]Biosplint retention fiber used in teeth ligation after agomphiasis caused by upper incisor trauma has reliable efficacy and good comfort ,so it is an ideal periodontal splint .