Evaluation of radiopacity and discriminability of various fiber reinforced composite posts

Abstract

ABSTRACT Ⅰ. 서 론 방사선불투과도(radiopacity)는구강내치과재료에요구되는중요한특성중의하나이다. 치과진료의진단은방사선사진에크게의존하고있고주위해부학적구조물들과의경계를명확히하고수복물의적합도, 이차우식증, 장기안정성의지속적검사를위해치과수복재료의방사선불투과도는중요하다. 1-3) 수종의섬유강화레진포스트의방사선불투과도와식별도평가 이은혜 1 ∙최항문 2 ∙박세희 1 ∙김진우∙조경모*강릉원주대학교치과대학 1 치과보존학교실, 2 구강악안면방사선학교실 EVALUATION OF RADIOPACITY AND DISCRIMINABILITY OF VARIOUS FIBER REINFORCED COMPOSITE POSTS Eun-Hye Lee 1 , Hang-Moon Choi 2 , Se-Hee Park 1 , Jin-Woo Kim 1 , Kyung-Mo Cho 1 * 1 Department of Conservative Dentistry, 2 Department of Oral and maxillofacial radiology, College of Dentistry, Gangneung-Wonju National University, Gangneung, Korea The purpose of this study was to compare radiopacity and radiographic discriminability of various FRC-Posts.Six FRC-Posts were investigated ; 1) FRC Postec Plus (Ivoclar Vivadent AG, Schaan, Liechtenstein), 2)Snowlight (Carbotech, Lewis center, OH, USA), 3) Dentin Post (Komet Brasseler, Lamgo, Germany), 4)Rely-X Fiber Post (3M ESPE, St.paul, MN, USA), 5) D.T.-Light Post (BISCO, Schaumburg, IL,USA), 6)Luxapost (DMG, Hamburg, Germany) The radiographs of each post with a reference 1 mm / 2 mm alumi num step-wedge was taken using digi-tal sensor. The optical density were calculated by gray value of 10 ×10 pixel and compared in mm Alequivalent at five points.Six maxillary incisors of similar radiopacity were used. Radiographs of posts in Mx. incisors of lingualside of dry mandible were taken.We showed radiographs and asked the questionnaire to 3 radiologists, 3 endodontists, 3 general practi-tioners. The questionnaire was comprised of choices of the highest, lowest radiopaque individual post andthe choices of best discriminable post at apical, coronal area.The following results were obtained. 1. Each post system showed various radiopacity. 2. There was change of discriminability between each post and simulated specimens regardless of examiner.Although each post showed various radiopacity, the difference of radiopacity did not affect on discrim-inability.