各种CAD-CAM假牙材料的柔性强度,表面粗度和颜色稳定性
Ahmet Orgev1, Gulce Cakmak2, Chin-Chun Peng3
1Department of Restorative Dentistry, School of Dental Medicine, University at Buffalo, New York, USA.
概括
减法制造 (SM) 假牙具有比增材制造 (AM) 材料更高的屈曲强度. 热循环降低了屈曲强度,但没有影响表面粗性或导致AM或SM假牙牙的临床显著的颜色变化.
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
- 牙科假肢 牙科假肢
背景情况:
- 添加制造 (AM) 和减去制造 (SM) 是制造假牙的新兴技术.
- 评估这些材料的机械和美学特性对于临床成功至关重要.
研究的目的:
- 为了比较AM和SM假牙材料的屈曲强度 (FS),表面粗度和颜色稳定性.
- 研究热循环对这些特性的影响.
主要方法:
- 四种假牙材料 (斯特劳曼,Flexcera,Ivoclar,Candulor) 是使用AM和SM技术制造的.
- 在5000个热循环之前和之后,样品经过了三点屈曲强度测试和表面粗度/颜色变化测量.
- 使用双向ANOVA进行了统计分析.
主要成果:
- 减法制造 (SM) 材料的屈曲强度明显高于增材制造 (AM) 材料,无论热循环.
- 热循环显著降低了所有测试材料的屈曲强度.
- 表面粗度受到材料类型的显著影响,但不受热循环的影响.
- 所有材料都在热循环后呈现出低于临床上可感知的值的颜色变化.
结论:
- 热循环对AM和SM假牙材料的屈曲强度产生负面影响.
- 与AM材料相比,SM假牙材料表现出优越的屈曲强度.
- 这些材料的表面粗度和颜色稳定性在模拟老化后仍然在临床上是可以接受的.
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