The Application Value of ProTaper Root Canal System Expansion Combined with Nickel Titanium K File in the Elderly Molar Root Canal Surgery

Objective:To investigate the application value of ProTaper root canal system expansion combined with nickel titanium K file in the elderly molar root canal surgery. Methods: Clinical data of 156 elderly patients with acute and chronic pulpitis and apical periodontitis from February 2012 to October 2013 in our hospital were collected, 193 bad teeth were found and randomly divided into three groups, 60 for group A, 64 for group B, 69 for group C. Group A received treatment of ProTaper system manual endodontic combined with nickel-titanium K file for preparation the root canal. Group B received ProTaper Joint Tactical endodontic combined with nickel-titanium K file system for root canal preparation. Group C was given stainless steel K file for root canal. The appropriate charge rate, filling satisfaction rate and the incidence of acute reactions were assessed. Results: The appropriate charge rates of A, B, C group were 94.02%(110/117), 93.80%(121/129), 62.22%(89/143), the filled satisfaction rates were 96.58%(113/117), 96.12%(124/129), 58.04%(83/143) and the incidence of acute reactions were 4.27%(5/117), 4.65%(6/129), 26.57%(38/143). There was no significant difference between A and B groups in the appropriate charge rate, filling satisfaction rate and the incidence of acute reactions(P0.05), but compared with group C, they were significantly higher than those in the control group C, with statistically significant difference(P0. 05). Conclusion:The effect of ProTaper root canal system expansion combined with nickel titanium K file in the elderly molar root canal surgery is distinct.