원문정보
Processability study of dental zirconia block using scratch test
초록
영어
Purpose: This study was performed to investigate processability of the dental zirconia block. Most of the CAD/CAM zirconia restorations utilize the partially sintered blocks, which are sintered at a temperature lower than 1100℃. Methods: Partially sintered zirconia samples were prepared 40×30×10 ㎜ and surface treatment by #2000 sandpaper. Scratch hardness was determined by the procedure of ASTM G171-03 using a scratch hardness tester(KS TECH, Korea) equipped with a real time load detector to measure tangential force during scratching. The scratch rate was 30 ㎜/min. Results: Scratch hardness(Hs) increases steeply with increase in the loads. The highest Hs was sampl 1.42 GPa and lowest was sample 0.42 GPa. Conclusion : The machinability of partially sintered CAD/CAM zirconia blocks can be optivized by manipulation of Hs.
목차
I. 서론
II. 연구 방법
1. 시료준비
2. 시편제작
3. 스크래치 시험
4. 광학현미경 측정
5. 스크래치 경도
III. 결과
IV. 고찰
V. 결론
1. 가소결체 지르코니아 블록의 스크래치 경도
2. 가소결체 지르코니아 블록의 가공성
3. 지르코니아 블록의 선택
REFERENCES