摘要目的 评价使用机用镍钛器械pathfile联合Protaper预备根管的临床效果.方法 选择临床上患有牙髓炎、根尖周炎的需要进行根管治疗的患者200例,按就诊先后顺序分成两组,每组100例.实验组采取pathfile联合Protaper根管机动预备,热牙胶垂直加压充填；对照组采取Protaper根管机动预备标准法,热牙胶垂直加压充填.记录两组根管预备所需时间、器械折断数量,并根据术前、术中、术后X线片评价预备和根充效果.结果 两组预备的根管中,均未发生根管偏移,无侧穿,无台阶形成,无根尖孔位置改变,连续锥度好,与术前X线片吻合；实验组、对照组各有1例发生器械折断为S1锉,牙位分别为右下颌第二磨牙近中根根尖1/3处和左上第二磨牙近中颊根根尖位置；实验组根管预备时间明显较对照组短[前牙:(4.73±1.12)min vs(6.32±1.84)min,t=2.243,P＜0.05；双尖牙:(7.83±1.23) min vs(10.25±2.68) min,t=2.475,P＜0.05；磨牙:(10.14±1.18)min vs(15.43±5.94) min,t=2.991,P＜0.01].术后X线片显示,根充后实验组2例有少量糊剂超充,根管封闭严密,无欠充；对照组3例发生糊剂超充,亦无欠充.结论 使用机用镍钛器械pathfile联合Protaper 预备根管是可行的,同时提高了根管预备的效率.

abstractsObjective To evaluate the clinical effect of the use of pathfile and protaper nickel-titanium instruments for machine in root canal preparation.Methods A total of 200 patients suffering from pulpitis and periapical that needs root canal treatment was randomly divided into two groups according to treatment order (100 patients/each group).The experimental group was used pathfile and protaper in root canal preparation,and filled with warm gutta vertical condensation.The control group was used protaper root canal preparatory standards method,and filled with warm gutta vertical condensation.The required time of two sets of root canal preparation and the number of equipment broken were recorded,and X-ray film at the preoperation intraoperation and postoperation were used to evaluate effect of preparation and root filling.Results In the root canals prepared of the two groups,no issued offset,no side wear,no step-forming,and no position changed of the apical foramen were occurred,which was consistent with preperative X-ray film.One case was occurred fracture of instrument in the experimental group and the control group,it was Slfile.Tooth position was right mandibular,second molar nearly the root apical 1/3,and upper left second molar mesial buccal root apical position.The root canal preparation time of experimental group was significantly shorter than the control group[the front teeth:(4.73 ± 1.12) min vs (6.32 ± 1.84) min,t =2.243,P ＜0.05; the premolars:(7.83±1.23)min vs (10.25±2.68)min,t =2.475,P ＜0.05; the molars (10.14 ± 1.18) min vs (15.43 ± 5.94) min,t =2.991,P ＜ 0.01].Postoperative X-ray showed that 2 cases were occurred small amount of paste overfilled,the root canal closed tight,no less filling; and 3 cases of the control group occurred paste overfilled,no less filling too.Conclusions The use of nickel-titanium instruments pathfile and protaper for machine in root canal preparation is feasible,and improves the efficiency of root canal preparation.