Evaluation of dental operating microscope and ultrasonic technique in root canal retreatment / 华西口腔医学杂志

ABSTRACT

<p><b>OBJECTIVE</b>To explore the use of dental operating microscope with ultrasonic instruments in root canal retreatment.</p><p><b>METHODS</b>164 root canals in 124 teeth of 111 patients who need root canal retreatment were treated under dental operating microscope (DOM) with ultrasonic instruments, then the success rates were calculated.</p><p><b>RESULTS</b>Both 136 root canals with a success rate of 82.93% from 164 root canals and 103 teeth with a success rate of 83.06% from 124 teeth were managed successfully. The each category of the retreated teeth was 85.29% for calcified canals, 83.33% for canal subjected to resinifying therapy, 86.67% for misunderstood root canals, 100% for canals blocked by post, and 66.67% for both root canals blocked by instrument fragments and ledged.</p><p><b>CONCLUSION</b>The use of microscope and ultrasonic instruments was proved to be an effective way in the root canal retreatment.</p>