고정성 보철물의 적합도 측정 시 사용하는 실리콘 복제본 기술의 정확도 평가
An Evaluation Validity of the Silicone Replica Technique at Measurement on Fit of Fixed Dental Prostheses
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초록
제한된 조건 하에서 수행된 본 연구에서는 다음과 같은결론을 얻었다. 1. 치형과 고정성 보철물을 근 원심 방향의 단면에 8지점을 선정한 후 서로 다른 두 가지 방식으로 적합도를 측정하여 비교한 결과 8지점 모두에서 유의한 차이를 보이지 않았다(p＞0.05). 2. 8지점을 변연부, 경사부, 축벽부, 교합면으로 분류하여비교한 결과에서도 역시 두 측정 방법 간에 유의한 차이를보이지 않았다(p＞0.05). 이와 같은 결과를 바탕으로 실리콘 복제본 기술을 이용하여 적합도를 측정하는 것이 치형과 고정성 보철물을 직접절단하여 단면을 측정하는 것만큼 정확하다는 결론을 얻었다. 따라서 고정성 보철물의 적합도 측정 시 비 파괴적인 방법인 실리콘 복제본 기술을 이용한다면 치형과 고정성 보철물 모두 파괴하지 않고 측정이 가능할 것으로 사료된다.
Abstract
Marginal and internal fit are very important factor for the clinical long-term success of fixed dental prostheses (FDPs). A variety of methods have been applied to the measuring marginal and internal fit of FDPs. The purpose of this study was to compare the marginal and internal fit of 2 different measuring methods silicone replica technique [SRT] and die cutting technique (DCT). SRT, the space between die and FDPs were filled with light-body silicone, then stabilized by medium-body silicone. DCT, the FDPs were cemented on definitive dies and embedded into epoxy. The silicone replicas and epoxies were sectioned mesio-distal and measured 4 locations (margin, rounded chamfer, axial, occlusal) and using a digital microscope at a magnification x160. For the SRT the mean±SDs fit (mm) recorded were: margin 88.7±22.2, rounded chamfer 90.6±25.0, axial wall 61.5±21.8, occlusal 134.9±30.8. For the DCT the mean±SDs fit (mm) recorded were: margin 85.3±18.0, rounded chamfer 85.4±24.7, axial wall 62.0±21.3, occlusal 131.7±30.5. The mean±SDs size (mm) of SRT margin was 88.7±22.2 and of DCT margin was 85.3±18.0. There were no statistically significant difference (p＞0.05) of the four parts between SRT and DCT. It is considered an appropriate case to use SRT at fit of FDPs.
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