三种根管预备方式对根管充填封闭性的影响

Comparison of three root canal preparation methods in root canal filling

目的比较机用镍钛旋转锉Protaper、手用镍钛旋转锉Protaper、手用不锈钢K锉3种根管预备方式对根管充填封闭性的影响。方法将45例患者,共56颗患牙(148个根管)随机分为A、B、C 3组,每组15例,分别应用机用镍钛旋转锉Protaper、手用镍钛旋转锉Protaper、手用不锈钢K锉3种方式进行根管预备后,常规进行冷牙胶侧压充填,应用锥体束CT(CBCT)观察3种根管预备方式对患牙根管充填后封闭情况的影响。结果所有患牙根管治疗均顺利进行,A组恰填率最高,B组、C组其次;在恰填根管中,A组根管密合程度最优。结论机用镍钛旋转Protaper锉根管成形效果最好,根管充填质量高,根管充填材料封闭性最优,较少出现台阶、根管偏移情况,其余两组效果不如机用镍钛旋转锉Protaper,其中手用镍钛旋转锉Protaper次之,而手用不锈钢K锉较差。

Objective To compare the efficacy of three root canal preparation methods in root canal fil ing. Methods Forty five patients （56 teeth and 148 root canals） were randomly assigned to receive root canal preparation with rotary nickel tita-nium Protaper （group A, n=15）, hand used nickel titanium Protaper（group B, n=15）, or stainless steel K file （group C, n=15）, then root canal fil ing was finished with gutta pertscha. The impaction on root canal fil ing in the apical 3mm- 5mm was observed with CBCT. Results Al root canal treatments were carried out smoothly. Group A had the highest exactly fil ing rate, fol owed by groups B and C and group A also had the highest close contact. Conclusion Rotary nickel titanium Protaper is best in root canal shaping and root canal fil ing close contact, less likely steps and root canal offsets, fol owed by hand used nickel titanium Protaper and stainless steel K file.