The Clinical Curative Effect Of K3XF Rotary Nickel-titanium Files In Root Canal Preparation

Objective: This thesis compare the clinical effects of K3XF rotary nickel-titaniumfiles and stainless steel K files in root canal preparation. To observe endodonticinterappointment emergencies (IAE) incidence rate and pain level during the root canaltreatment. So that it could provide the experimental basis for the K3XF rotarynickel-titanium files used in clinical practice.Methods: Depending on the registration orders,40cases of chronic pulpitis weredivided into experimental group and control group at random, each group had20cases.All patients were healthy, without any therapy, it had no pulp stone, no petiodontitis orcracked tooth. Taken X-ray commonly, entering into the pulp chamber through enamelwith a fissure bur on the painless condition. Then cleaned the root canal with barbedbroach. Clean root canal with3%H2O2and0.9%NaCl. Set up each root canal channelwith10#or15#stainless steel K files and used the root canal measuring instrument andX-ray to determine the working length. Experimental group: K3XF rotary nickel-titanium files prepared the canal using crown-down method. Control group: Stainlesssteel K files prepared the canal using conventional method. During the preparation,cleaned the canal with3%H2O2and0.9%NaCl. After the preparation, dried the canal,and put calcium hydroxide paste into root canal, and closed it one week. Asked thepatient if it was pain or swelling occurred, referral timely. Lighter symptoms, re-flushdressing; heavier symptoms, opened drainage using CP cotton ball. One week later,after no IAE happening, clean root canal, dry it and fill with gutta-percha and paste.Results: In IAE incidence rate, experimental group was5%, control group was30%. so the effect of experimental group was better than control group (P<0.05). In painlevel, the two group has statistically significant difference in pain level II (P<0.05) andthere was no statistically significant difference between the two group in pain level0, Ⅰ, and Ⅲ (P>0.05).Conclusions: The use of K3XF rotary nickel-titanium files can reduce IAEsignificantly and it is better than stainless steel K files in the pain level II during the rootcanal preparation.