四手操作提高热牙胶垂直加压充填效率与效果的体外研究

An in vitro study of obturation efficiency and outcomes of vertical condensation of warm gutta-percha using the four-handed technique

目的探讨四手操作在提高热牙胶垂直加压充填技术效果和效率中的作用。方法制作可分离式根尖不规则形态及根尖侧支根管模型，对四手操作组和独立操作组分别充填10次，比较2组的操作时间；分离根管模型，根据对根尖不规则区和对根尖区侧支根管的复制能力分为0-2级，记录不同级别的根管数目，配对等级秩和检验比较2组根管根尖区的充填效果。结果在充填时间上四手操作组明显少于独立操作，在充填效果上2组比较差异亦有统计学意义。结论四手操作可以明显提高热牙胶根管充填的效率，并且可以提高热牙胶根管充填质量。

Objective To evaluate the therapeutic efficiency and outcomes of vertical condensation of warm gutta-percha obturation using the four-handed technique. Methods A split-tooth model con- structed with lateral grooves and depressions was used to compare vertical condensation of warm gutta-per- cha obturation with and without the four-handed technique. Respectively 10 times of obturation were done in the four-handed group and the independent operation group. The operation time and defect replication quality were recorded. Evaluation of defect replication quality was on an ordinal scale 0 to 2 grade based on how much each defect was replicated. The results were statistically analyzed. Results There were signifi- cant differences in treatment time between the four-handed group and the independent operation group, as well as in treatment outcomes between two groups. Conclusions Use of the four-handed technique can improve therapeutic efficiency and outcomes of vertical condensation of warm gutta-percha obturation.