The Effect of canal obturation according to the depth of the System B Plugger tip in the Type IV canal

Abstract

ABSTRACT Ⅰ. 서 론 근관치료란근관내치수조직및오염물을제거하고충전이용이한형태로근관성형과정을거친후마지막으로불활성이면서생체적합성을갖는재료로근관계를밀폐하는것이다. 완전한근관의밀폐는치주조직의생물학적파괴를일으키는자극원의침윤과축적을방지하는데필수적이며 제Ⅳ형근관에서System B Plugger tip의깊이에따른근관충전효과 최희원 1 ∙김수미 2 ∙황호길 1 ＊ 1 조선대학교치과대학치과보존학교실ㆍ 2 서남대학교의과대학치과학교실 THE EFFECT OF CANAL OBTURATION ACCORDING TO THE DEPTHOF THE SYSTEM B PLUGGER TIP IN THE TYPE ⅣCANAL Hee-Won Choi 1 , Soo-Mee Kim 2 , Ho-Keel Hwang 1 ＊ 1 Department of Conservative Dentistry, College of Dentistry, Chosun University 2 Department of Dentistry, College of Medicine, Seonam University The purpose of this study was to evaluate the effect of the api cal sealing according to the depth of theSystem B Plugger tip when root canal was filled with gutta-percha and sealer by Continuous Wave ofCondensation technique in the Type Ⅳcanal. 50 simulated resin blocks with J-shaped curvature canals were instrumented by ProTaper (DentsplyMaillefer, Ballagiues, Switzerland) Ni-Ti files using the crown-down technique. Type Ⅳcanals were madeusing a broken ProTaper F3 Ni-Ti file for making a ledge at 3mm short from the working length. AndProTaper F1 Ni-Ti file was used for perforating resin block. The prepared Type Ⅳcanals were randomly divided into three experimental groups of 15 each accordingto the depth of System B Plugger tip.All of experimental groups were obturated with Continuous Wave of Condensation technique. The lengthof gutta-percha and sealer in lingual of the Type Ⅳcanals was m easured with a measuring digital calliperunder magnifying glass (×2.3). The results are as follows :1. In control group, there was no gutta-percha and sealer in lingual canal. 2. 3 mm group showed relatively more gutta-percha than 5mm or 7 mm group (p〈0.05). 3. 7 mm group did not showed gutta-percha and relatively more void were observedthan 3mm or 5 mm group. (p〈0.05)In conclusion, within the limits of the results of this experiment, the 3 mm depth of System B Plugger tipwas acceptable for obturating the Type Ⅳcanal.