The effect of combined application of Pathfile in the VDW-Mtwo nickel titanium file for narrow root canals preparation in the elderly / 中国基层医药

ABSTRACT

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.