论文部分内容阅读
目的体外观察Protaper手用法预备和K锉预备的根管后使用注射式常温牙胶充填系统(GuttaFlow)充填的根尖封闭性比较。方法 30颗离体人上下颌前磨牙,随机分为两组,截冠开髓拔髓,按照Protaper及K锉的使用要求进行根管预备,至F3,干燥根管,Guttaflow充填根管,直接观察超充情况,X线片评价整体的充填效果,透明牙法观察根尖渗漏情况。结果 Protaper组10个根管中有2个出现少量牙胶超充。K锉组10个根管中有3个出现少量牙胶超充。X线示Protaper组及K锉组未见欠充,与管壁未见明显空隙,可充填进入侧支根管,Protaper组根管三维形态优于K锉组。结论使用Pro-taper与K锉均能预备根管简便快速,根管形态良好,有可能出现牙胶超充,但超出量较少,根管能获得良好的封闭性。
Objective To compare the root apical sealability of Giant Filling (GuttaFlow) filling system after Protaper hand-preparation and K-file preparation of root canal in vitro. Methods Thirty human premolar and mandibular premolars were randomly divided into two groups. The trochal was excised and the root canal was prepared according to Protaper and K files. To F3, dry root canal and Guttaflow were filled directly, Observed overcharge, X-ray evaluation of the overall filling effect, transparent tooth method to observe the apical leakage. Results In the Protaper group, 2 out of 10 root canals had a small amount of gutta percha. Three of the 10 root canals in the K-file group developed a small amount of gutta-percha filling. X-ray showed Protaper group and K file group no under-charge, and the tube wall no obvious gap, can be filled into the lateral branch canal, Protaper root canal three-dimensional shape is better than the K file group. Conclusion Both Pro-taper and K-file can be used to prepare simple and rapid root canal. The shape of root canal is good.