주입선의 설계가 임플란트 보철물의 적합도에 미치는 영향
Effect of the Sprue Design on the Fitness of Implant Prosthesis
황성택, 안재석, 신상완,
소속 상세정보
황성택 ( Hwang Sung-Taek ) - 고려대학교 의학대학원
안재석 ( Ahn Jae-Seok ) - 고려대학교 안산병원 치과기공실
신상완 ( Shin Sang-Wan ) - 고려대학교 구로병원 치과
KMID : 0362120080300020057
Abstract
Statement of problem: Conventional techniques for implant framework fabrication produce significant error that is inconsistent with passive-fit requirement for osseointegrated implants. One of the etiologic factors which cause the errors is a sprue which may deform the framework during solidification and contraction. Purpose: This study was aimed to evaluate objectively effect of the sprue design on the accuracy of fit of implant prosthesis. Materials and method: Three different designs were considered relative to effect of casting accuracy. The first design had straight sprues and a button of excess alloy at the non-casting end of the sprues. The second was runner bar design(with the button). The last was straight sprues design(without the button). Gold cylinder and laboratory analogue had been used to diminish variables affecting to casting accuracy. Gold alloy and pressure-vacuum casting machine had been used. Marginal gap had been measured by SEM. One-way ANOVA and Duncan test had been used for statistical analysis. Results: The first design showed 79.87+-13.95um marginal gap. The second and third were 40.17+-15.8um and 35.17+-9.95um respectively. Conclusion: Straight sprues without button and runner bar designs were more accurate than straight sprues with button design(P<.05).
키워드
Sprue; Button; Casting accuracy
원문 및 링크아웃 정보
등재저널 정보