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Transparent resin block을 이용한 K3, NRT, PROFILE의 apical transportation 및 working length 변화양상의 비교

Other Titles
 Comparison of apical transportation and change of working length in K3, NRT AND PROFILE rotary instruments using transparent resin block 
 윤민정  ;  송민주  ;  김의성  ;  신수정 
 Journal of Korean Academy of Operative Dentistry (대한치과보존학회지), Vol.36(1) : 59-65, 2011 
Journal Title
 Journal of Korean Academy of Operative Dentistry  (대한치과보존학회지) 
Issue Date
OBJECTIVES: The purpose of this study is to compare the apical transportation and working length change in curved root canals created in resin blocks, using 3 geometrically different types of Ni-Ti files, K3, NRT, and Profile. MATERIALS AND METHODS: The curvature of 30 resin blocks was measured by Schneider technique and each groups of Ni-Ti files were allocated with 10 resin blocks at random. The canals were shaped with Ni-Ti files by Crown-down technique. It was analyzed by Double radiograph superimposition method (Backman CA 1992), and for the accuracy and consistency, specially designed jig, digital X-ray, and CAD/CAM software for measurement of apical transportation were used. The amount of apical transportation was measured at 0, 1, 3, 5 mm from 'apical foramen - 0.5 mm' area, and the alteration of the working length before and after canal shaping was also measured. For statistics, Kruskal-Wallis One Way Analysis was used. RESULTS: There was no significant difference between the groups in the amount of working length change and apical transportation at 0, 1, and 3 mm area (p = 0.027), however, the amount of apical transportation at 5 mm area showed significant difference between K3 and Profile system (p = 0.924). CONCLUSIONS: As a result of this study, the 3 geometrically different Ni-Ti files showed no significant difference in apical transportation and working length change and maintained the original root canal shape.
Appears in Collections:
1. Journal Papers (연구논문) > 2. College of Dentistry (치과대학) > Dept. of Conservative Dentistry (보존과학교실)
Yonsei Authors
김의성(Kim, Eui Seong) ; 송민주(Song, Min Ju) ; 신수정(Shin, Su Jung) ; 윤민정(Yoon, Min Jung)
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