在老化过程中用于单体修复的多层半透明石中不同区域的特性变化
Phil-Joon Koo1, Jong-Hyuk Lee1, Seung-Ryong Ha1
1Department of Prosthodontics, College of Dentistry, Dankook University, Cheonan 31116, Republic of Korea.
Journal of functional biomaterials
|March 26, 2025
概括
热水老化会影响多层半透明的机械和表面性能,氧化物含量会影响结果. 3Y/5Y-TZP过渡区表现出弹性,但老化后表面粗度增加.
科学领域:
- 材料科学 材料科学 材料科学
- 生物材料工程 生物材料工程
- 牙科陶 牙科陶 的使用.
背景情况:
- 多层半透明石越来越多地用于牙科修复.
- 了解这些材料在热水条件下的长期稳定性对于临床成功至关重要.
- 多层陶中的过渡区是机械完整性的关键区域.
研究的目的:
- 评估长期热水老化对多层半透明的过渡区的机械和表面性能的影响.
- 为了比较不同类型的半透明的老化行为,包括常规和多层配方.
- 为了研究含有氧化对老化后材料稳定性的影响.
主要方法:
- 准备了360个常规 (3Y-TZP,4Y-TZP) 和多层半透明 (5Y-TZP,3Y/5Y-TZP) 的圆盘形样本.
- 标本在134°C和0.2 MPa的温度下经过水热老化,分别为0,5和10小时.
- 评估了机械性能 (双轴屈曲强度,纳米沉硬度,扬模量) 和表面性能 (粗度,相位转换,微裂纹).
主要成果:
- 在老化之前,特定的合金类型 (ZL,ZP) 呈现出高的双轴屈曲强度,而ZT显示出最高的硬度和Young的模量.
- 在老化后,某些类型 (ZL) 的表面粗度显著增加,单临床相位含量增加,导致像微裂这样的表面缺陷.
- 3Y/5Y-TZP过渡区表现出与3Y-TZP相似的机械和相位变化,但在老化后具有中间表面粗度.
结论:
- 水热老化显著改变了多层半透明的表面和机械性能,特别是影响了相位稳定性和表面完整性.
- 氧化物含量和老化过程是影响这些牙科陶的机械和表面特性的关键因素.
- 3Y/5Y-TZP过渡区表现出特定的衰老反应,这对其在牙科应用中的长期性能有影响.
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