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KMID : 0362420020400020184
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Journal of Korean Academy of Prosthodontics
2002 Volume.40 No. 2 p.184 ~ p.192
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A Study on the Abrasion Resistance and Surface Roughness of the Dental Stones
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Shim Hye-Won
Yi Yang-Jin
Cho Lee-Ra
Chung Kyung-Ho
Kim Kyoung-Nam
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Abstract
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The purpose of this study was to investigate the abrasion resistance and surface roughness of conventional dental stones and improved dental stones and newly developed dental stones. Materials included in this study were several dental stones and newly developed dental stone; 2 type III, 6 type IV(including newly developed dental stone),1 type V Ten specimens for each material,total ninety specimens were made. Each specimen was subjected to 50 complete cycle abrasion under constant load 0.42N at speed of 6mm per sec.The depth after abrasion test was measured for each specimen. Surface roughness before and after abrasion test was compared.The results were as follows ;1.The resin containing die materials such as Tuff Rock and Resin Rock had superior abrasion resistance.2.Type IV,V Surface roughnessdental stone exhibited greater abrasion resistance than Type IIIdental stone.3.The results of the surface roughness showed similar pattern with the abrasion resistance.
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KEYWORD
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Abrasion resistance, Dental stone, Surface roughness
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