【摘要】 目的探讨超声根管清洗对纤维桩在根管内固位力的增强效果。方法选取因患者正畸需要拔除的离体牙50颗。将离体牙按随机数字表法分为A组和B组,各25颗。两组离体牙均在距离釉牙骨质界上方2mm位置截冠,准备好根管桩道,均接受根管治疗。A组离体牙给予常规0.9%氯化钠溶液冲洗;B组离体牙给予超声根管清洗。每组选取20颗离体牙进行拉伸试验测试纤维桩粘接固位力并进行比较;另选5个粘桩后离体牙于根颈、根中及根尖部位切取1.5mm薄片,观察并比较两组粘接剂与根管壁粘接界面缝隙。结果 B组离体牙纤维桩粘接固位力明显高于A组,两组比较差异有统计学意义[(205.37±15.52)N vs (152.41±13.25)N,P<0.05]。结论超声根管清洗能够增强纤维桩在根管内的固位力,值得临床推广。更多还原

【Abstract】 Objective To investigate the effect of ultrasonic root canal cleaning on the retention of fiber posts in the root canal.Methods Fifty isolated teeth that need to be removed due to orthodontics were randomly divided into two groups with 25 in each. The isolated teeth were cut at 2 cm above the enamel bone boundary, and the root canal was prepared for treatment. Group A was treated with conventional leaning with 0.9% sodium chloride solution, and group B was given ultrasonic root canal cleaning. Ten sets of isolated teeth were selected for each group to test the adhesion strength of the fiber post. After selecting 5 sticks, the 1.5 mm thin slices were cut from the root neck, root and root tip. The gap between the two sets of adhesive and the root canal wall bonding interface was compared. Results The adhesion retention force of group B was higher than that of group A [(205.37±15.52)N vs(152.41±13.25)N, P<0.05]. Conclusion Ultrasonic root canal cleaning can enhance the retention of fiber post in the root canal, which is worthy of clinical promotion.更多还原