使用四种不同计算机辅助制造技术制作的陶瓷层压贴面的边缘和内部密合度比较

Nguyen Viet Anh, Vo Truong Nhu Ngoc, Tong Minh Son, Hoang Viet Hai, Nguyen Thu Tra
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摘要

目的:计算机辅助设计和计算机辅助制造(CAD/CAM)技术的改进改变了层压贴面的制作方法。本研究的目的是评估使用不同的 CAD/CAM 技术制作的陶瓷贴面的边缘和内部密合度。材料和方法:通过复制准备好的塑料上颌中右切牙制作一个金属模具,然后扫描用于设计覆膜贴面。使用四种不同的 CAD/CAM 技术制作了 100 个覆膜贴面(n=25),包括研磨二硅酸锂(MLD)、热压二硅酸锂与三维打印蜡型(PLD)、研磨氧化锆(MZ)和三维打印氧化锆(PZ)。使用数字牙冠试戴软件对制作的贴面的虚拟边缘和内部密合度进行了评估。实际的边缘和内部密合度是在数码显微镜下用硅胶复制法测量的。测量数据采用单因素方差分析和土耳其检验进行分析。结果显示不同制造技术的边缘和内部密合度存在明显差异(P < 0.001)。与 MLD 和 MZ 组相比,PLD 和 PZ 组的虚拟和实际边缘及内部间隙都更大。结论:所有四种CAD/CAM贴面制造技术,即研磨二硅酸锂、热压二硅酸锂与3D打印蜡型、研磨氧化锆和3D打印氧化锆,在临床上都具有可接受的边缘和内部密合度。与三维打印氧化锆和带有三维打印蜡型的热压二硅酸锂贴面相比,研磨氧化锆和二硅酸锂贴面的边缘和内部密合度更优。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Comparison of the Marginal and Internal Fit of Ceramic Laminate Veneers Fabricated with Four Different Computer-Aided Manufacturing Techniques.

Purpose: The improvement of computer-aided design and computer-aided manufacturing (CAD/CAM) has changed the methods of fabricating laminate veneers. The objectives of this study were to evaluate the marginal and internal fit of ceramic veneers manufactured with different CAD/CAM techniques. Materials and methods: A metal die was made by copying a prepared plastic maxillary central right incisor and scanned for designing a laminate veneer. One hundred laminate veneers were made with four different CAD/CAM techniques (n=25), including milled lithium disilicate (MLD), heat-pressed lithium disilicate with 3-dimensional (3D) printed wax patterns (PLD), milled zirconia (MZ), and 3Dprinted zirconia (PZ). The virtual marginal and internal fit of fabricated veneers was evaluated with digital crown fitting software. The actual marginal and internal fit was measured with the silicone replica method under a digital microscope. The measured data were analyzed using the one-way analysis of variance and the Turkey test. Results: There were significant differences in marginal and internal fit (P < 0.001) among manufacturing techniques. Both the virtual and actual marginal and internal gaps were higher in the PLD and PZ groups compared to the MLD and MZ groups. Conclusion: All four CAD/CAM techniques of manufacturing veneers, that is, milled lithium disilicate, heat-pressed lithium disilicate with 3D-printed wax patterns, milled zirconia, and 3D-printed zirconia, have clinically acceptable marginal and internal fit. Milled zirconia and lithium disilicate veneers demonstrated superior marginal and internal fit compared to 3D-printed zirconia and heat-pressed lithium disilicate veneers with 3D-printed wax patterns.

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