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目的比较并评价3种不同暂封材料的冠部封闭效果。方法收集2011年1月至2012年5月于佛山市禅城区向阳医院因正畸或牙周病拔除的完整成人单根前磨牙60颗,备洞开髓后随机分为3组,每组20颗,分别用Clip、Cavit G、氧化锌丁香油酚黏固剂(ZOE)3种暂封材料充满窝洞,经封闭处理后浸入2%亚甲蓝溶液染色,在暂封7d和14d时取出每组各10颗牙齿,顺牙长轴近远中向纵向剖开,观察染料渗入最大长度,并以此来评估3种暂封材料的冠部封闭效果。结果 7d时Clip组和CavitG组封闭效果均优于ZOE组(P<0.05),14d时Clip组封闭效果优于其他两组(P<0.05)。结论 Clip是一种较好的根管治疗髓腔暂封材料。
Objective To compare and evaluate the crown closure effect of three different temporary materials. Methods A total of 60 adult single root premolar teeth were collected from Xiangyang Hospital of Chancheng District, Foshan City from January 2011 to May 2012. The holes were randomly divided into three groups Three kinds of temporary materials, namely Clip, Cavit G and zinc oxide eugenol cement (ZOE), were filled in the cavities and were immersed in a 2% solution of methylene blue and closed after being exposed for 7 days and 14 days respectively Each group of 10 teeth, along the long axis of the longitudinal incision longitudinally cut open to observe the maximum length of dye infiltration, and in order to assess the three kinds of temporary closure of the crown closure material. Results The blocking effect of both Clip group and CavitG group was better than that of ZOE group (P <0.05) on the 7th day, and the blocking effect of the Clip group was superior to the other two groups on the 14th day (P <0.05). Conclusion Clip is a better root canal treatment of temporary canal material.