지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2014.9
- 수록면
- 155 - 160 (6page)
- DOI
- 10.14815/kjdm.2014.41.3.155
이용수
초록· 키워드
오류제보하기
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.
목차
ABSTRACT
1. 서론
2. 실험재료 및 방법
3. 실험결과
4. 고찰
참고문헌
참고문헌 (27)
참고문헌 신청
1. [학술지(정기간행물)] - Ali IL / 2008 / Hardness, flexural strength, and flexural modulus comparisons of three differently cured denture base systems / J Prosthodont 17 (7) : 545 ~ 549
2. [기타자료] - ASTM E384-10 / 2010 / Standard test method for Knoop and Vickers hardness of materials / ASTM Inernational
3. [학술지(정기간행물)] - Azevedo A / 2006 / Effect of disinfectants on the hardness and roughness of reline acrylic resins / J Prosthodont 15 (4) : 235 ~ 242
4. [학술지(정기간행물)] - Consani RL / 2009 / Effect of repeated disinfections by microwave energy on the physical and mechanical properties of denture base acrylic resins / Braz Dent J 20 (2) : 132 ~ 137
5. [학술지(정기간행물)] - Crawford RJ / 1982 / Microhardness testing of plastics / Polymer Testing 3 (1) : 37 ~ 54
2. [기타자료] - ASTM E384-10 / 2010 / Standard test method for Knoop and Vickers hardness of materials / ASTM Inernational
3. [학술지(정기간행물)] - Azevedo A / 2006 / Effect of disinfectants on the hardness and roughness of reline acrylic resins / J Prosthodont 15 (4) : 235 ~ 242
4. [학술지(정기간행물)] - Consani RL / 2009 / Effect of repeated disinfections by microwave energy on the physical and mechanical properties of denture base acrylic resins / Braz Dent J 20 (2) : 132 ~ 137
5. [학술지(정기간행물)] - Crawford RJ / 1982 / Microhardness testing of plastics / Polymer Testing 3 (1) : 37 ~ 54
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