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机械加工方法和边缘设计对单体石皇冠的精度和边缘质量的影响
Yi Zhou1, Wenjia Chen2, Han Zhu2
1Attending, Department of Prosthodontics, Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Engineering Research Center of Oral Biomaterials and Devices of Zhejiang Province, Hangzhou, PR China.
与传统削相比,凝沉积制造的金冠提供了更高的加工精度和边际完整性. 凝沉积的皇冠中的边缘没有缺陷,而羽毛边缘边缘显示出更好的适合性.
科学领域:
- 牙科材料科学 牙科材料科学
- 生物材料工程是生物材料的工程.
- 牙修复 牙修复 牙修复 牙修复 牙修复
背景情况:
- 机械加工精度和单体石冠的边际完整性对于长期的牙存活和牙周健康至关重要.
- 对于这些冠状的最小侵入性制剂提出了挑战,对加工方法影响的研究有限.
研究的目的:
- 通过数字评估单体石冠的加工精度和边缘质量.
- 为了比较凝沉积 (SGG) 和传统软 (MG) 制造工艺.
- 评估和羽毛边缘边缘设计对皇冠质量的影响.
主要方法:
- 通过凝沉积 (n=20) 和软磨 (n=20) 制造了40个单体石冠.
- 皇冠被分为和羽毛边缘边缘子组.
- 使用根平均平方 (RMS) 值评估真实性和合适性;通过扫描电子显微镜 (SEM) 检查边缘质量.
主要成果:
- 凝沉积 (SGG) 在形和形区域 (P<.001) 显示出明显更高的真实性 (较低的RMS值) 比削 (MG).
- 羽翼边缘边缘显示出明显更好的边缘适合 (较低的RMS值) 比边缘 (P<.01).
- SGG表现出同质的微观结构,只有带有边缘的 SGG 没有出现边缘缺陷.
结论:
- 凝沉积采用柔性模式加工,与传统削相比,其精度更高.
- 凝沉积的冠状与边缘展现出无缺陷的边缘区域.
- 羽毛边缘边缘提供了更好的边缘适应性,而不是单立体石皇冠中的边缘.
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