Accuracy of Root ZX in teeth with simulated root perforation in the presence of gel or liquid type endodontic irrigant
신형순, 양원경, 김미리, 고현정, 조경모, 박세희, 김진우,
소속 상세정보
신형순 ( Shin Hyeong-Soon ) - Ulsan University Asan Medical Center Department of Conservative Dentistry
양원경 ( Yang Won-Kyung ) - Ulsan University Asan Medical Center Department of Conservative Dentistry
김미리 ( Kim Mi-Ri ) - Ulsan University Asan Medical Center Department of Conservative Dentistry
고현정 ( Ko Hyun-Jung ) - Ulsan University Asan Medical Center Department of Conservative Dentistry
조경모 ( Cho Kyung-Mo ) - Gangneung-Wonju National University College of Dentistry Department of Conservative Dentistry
박세희 ( Park Se-Hee ) - Gangneung-Wonju National University College of Dentistry Department of Conservative Dentistry
김진우 ( Kim Jin-Woo ) - Gangneung-Wonju National University College of Dentistry Department of Conservative Dentistry
KMID : 0362320120370030149
Abstract
Objectives: To evaluate the accuracy of the Root ZX in teeth with simulated root perforation in the presence of gel or liquid type endodontic irrigants, such as saline, 5.25% sodium hypochlorite (NaOCl), 2% chlorhexidine liquid, 2% chlorhexidine gel, and RC-Prep, and also to determine the electrical conductivities of these endodontic irrigants.
Materials and Methods: A root perforation was simulated on twenty freshly extracted teeth by means of a small perforation made on the proximal surface of the root at 4 mm from the anatomic apex. Root ZX was used to locate root perforation and measure the electronic working lengths. The results obtained were compared with the actual working length (AWL) and the actual location of perforations (AP), allowing tolerances of 0.5 or 1.0 mm. Measurements within these limits were considered as acceptable. Chi-square test or the Fisher's exact test was used to evaluate significance. Electrical conductivities of each irrigant were also measured with an electrical conductivity tester.
Results: The accuracies of the Root ZX in perforated teeth were significantly different between liquid types (saline, NaOCl) and gel types (chlorhexidine gel, RC-Prep). The accuracies of electronic working lengths in perforated teeth were higher in gel types than in liquid types. The accuracy in locating root perforation was higher in liquid types than gel types. 5.25% NaOCl had the highest electrical conductivity, whereas 2% chlorhexidine gel and RC-Prep gel had the lowest electrical conductivities among the five irrigants.
Conclusions:
Different canal irrigants with different electrical conductivities may affect the accuracy of the Root ZX in perforated teeth.
키워드
Electrical conductivity; Root canal irrigants; Root perforation; Root ZX
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