원문정보
Influence of low temperature degradation on the bond strength and flexural Strength of veneered Zirconia(3Y-TZP)
초록
영어
the bond strength and flexural strength of ceramic veneered zirconia. Methods: 3Y-TZP specimens(KaVo Zr, 25㎜×3㎜×1㎜)were prepared by five pre-treatment methods and divided into seven groups including control two groups, subsequently the specimens veneered with the E-MAX ceram according to manufacturer’s information(total specimen thickness 1.5㎜). Two groups from ceramic-zirconia specimens(n=105, n=15 per group)were assigned into two experimental fatigue conditions, namely storage in an autoclave at 134℃ for 5h, thermo-cycling(3,000cycles, between 5 and 55℃, dwell time 45s, transfer time 2s). A flexural strength test was performed in a universal testing machine(crosshead speed: 0.5㎜/min). Data were statistically analyzed using one-way ANOVA and Tukey’s test(α=0.05). Results: The ceramic-zirconia bond strength value for liner application group(LLW, 27.3±3.8) were significantly lower than those of the pre-treatment groups(30.72±5.3). The ceramic-zirconia bond strength and zirconia flexural strength was not affected by thermo-cycling(p>0.05), whereas it was affected by storage in an autoclave at 134℃ for 5h(p<0.05). Conclusion: The results indicated that the ceramic-zirconia bond strength and zirconia flexural strength was affected by low temperature degradation.
목차
Ⅱ. 연구 방법
1. 지르코니아 시편제작
2. 도재전장 지르코니아 시편제작(도재 층의 형성)
3. 열수처리(Hydrothermal treatment)
4. 3점 굴곡강도 시험
5. 통계 분석
Ⅲ. 결과
1. 전처리 방법과 열수처리(Hydrothermal treatment)에 따른 결합강도 변화
2. 전처리 방법과 열수처리(Hydrothermal treatment)에 따른 굴곡강도 변화
Ⅳ. 고찰
Ⅴ. 결론
참고문헌