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논문 기본 정보

자료유형
학술저널
저자정보
김규리 (단국대학교) 김동애 (단국대학교) 김남석 (단국대학교) 양태현 (단국대학교) 이해형 (단국대학교)
저널정보
대한치과재료학회 대한치과재료학회지 대한치과재료학회지 제41권 제3호
발행연도
2014.9
수록면
155 - 160 (6page)
DOI
10.14815/kjdm.2014.41.3.155

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초록· 키워드

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The purpose of this study was to examine the effects of indentation load and storage in water on Vickers hardness and viscoelastic recovery of indentation of denture base resins. Two types of acrylic denture base materials were investigated; Vertex (VT) and Acryshot (AS). Five resin disks each were prepared in 20 mm diameter and 1.8 mm in thickness) and highly polished according to manufactures recommendations. Vickers hardness test was conducted at a load of 25, 250, 500, 1000, 2000 gf with a dwell time of 30 s from one specimen. Vickers hardness (HV) and maximum indentation depth values at each load were averaged from three measurements. Vickers diagonal length of each indentation was re-measured after water storage of 1, 3, and 7 days, and HV values of specimens were recalculated. There were no significant differences in HV between indention loads (p>0.05), indicating no load dependency in HV value of specimens. Moreover, the HV value of specimens did not show statistically significant change after water storage up to 7 days. However, the indentation depth (D<SUB>m</SUB>) values were higher than the indentation depth (D<SUB>c</SUB> ) calculated from Vickers indentaiton geometry. The difference between D<SUB>m</SUB> and D<SUB>c</SUB> was increased with increase in indentation load, indicating some load dependency. This phenomenon was probably due to immediate viscoelastic recovery of denture base resins. Vickers hardness with indentation depth measurement can be a useful tool to investigate mechanical behavior of denture base resins.

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ABSTRACT
1. 서론
2. 실험재료 및 방법
3. 실험결과
4. 고찰
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UCI(KEPA) : I410-ECN-0101-2015-510-002884682