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KMID : 1023420120120060566
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Journal of Dental Hygiene Science
2012 Volume.12 No. 6 p.566 ~ p.571
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An Evaluation Validity of the Silicone Replica Technique at Measurement on Fit of Fixed Dental Prostheses
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Kim Jae-Hong
Kim Ki-Baek
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Abstract
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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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KEYWORD
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Dental restoration, Internal fit, Marginal adaptation
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