联合应用Pathfile在VDW-Mtwo镍钛锉预备老年人狭窄根管中的效果

The effect of combined application of Pathfile in the VDW-Mtwo nickel titanium file for narrow root canals preparation in the elderly

目的 探讨联合应用Pathfile在VDW-Mtow预备老年狭窄根管中的疗效.方法 选取老年患者35颗患牙共101根管.抽签法随机抽取A组或B组,A组以Pathfile联合VDW-Mtow镍钛锉预备根管,B组以单纯VDW-Mtow预备根管.采用热牙胶连续波充填.记录每个根管的预备时间,器械折断数、术后疼痛例数,X线评价根管预备效果.结果 A组根管预备时间为（5.14±1.25） min,明显短于B组的（6.82±1.76） min（t =5.539,P＜0.05）;两组台阶形成、恰填率差异均无统计学意义（P=1.00、1.74）;A组器械完好为100.00％,明显优于B组的79.17％ （x2 =4.279,P=0.039）;两组术后疼痛差异无统计学意义（P=0.20）.结论 VDW-Mtow预备老年狭窄根管时,联合使用Pathfile镍钛锉可以缩短预备时间,减少断针数.

Objective To explore the effect of combined application of Pathfile in the VDW-Mtwo nickel titanium file in the elderly narrow canals.Methods 35 teeth with 101 root canals were divided into the two groups by drawing lots.In group A,root canals were prepared with VDW-Mtwo and Pathfile.In group B,root canals were prepared with VDW-Mtwo.All root canals were filled with continuous wave thermoplasticized gutta-percha technique.The operating time for each root canal,the number of broken instruments and postoperative pain were recorded.The efficacy of reparation was analyzed with radiography.Results The root canal preparation time of group A was （5.14 ± 1.25） min,which was significantly shorter than （6.82 ± 1.76） min of group B （t =5.539,P 〈 0.05） ; The difference was not statistically significant in step formation and just fill rate between the two groups （P =1.00,1.74） ; The instrument intact of group A was 100.00%,which was significantly higher than 79.17% of group B （x2 =4.279,P =0.039） ;The difference was not statistically significant in pain after operation between the two groups （P =0.20）.Conclusion For narrow root canals preparation in the elderly treated with Mtwo and Pathfile would be shorten the preparation time and reduce broken instruments.