Jeong Chang-Sub, Moon Joon-Mo, Lee Hee-Jeong, Bae Ji-Myung, Choi Eun-Joo, Kim Sung-Tae, Park Youngbum, Oh Seunghan
Department of Dental Biomaterials and the Institute for Biomaterials and Implant, College of Dentistry, Wonkwang University.
Department of Dental Laboratory Technology, Faculty of Health and Medical Sciences, Wonkwang Health Science University.
Dent Mater J. 2023 Mar 30;42(2):273-281. doi: 10.4012/dmj.2022-154. Epub 2023 Jan 25.
The aims of this study were to estimate the machinability and machining accuracy of polymer-based CAM blocks using the merlon fracture test model specified in ISO 18675: 2022. Three hybrid disc blanks (MazicDuro, HC Disk, and Enamic) and three polymethyl methacrylate (PMMA) disc blanks (PMMA Disk, PMMA Block, and MazicTemp Hybrid) were tested in this study. The machinability was evaluated by assigning scores according to the fracture range of merlons with areas divided by ten vertical planes. The machining accuracy was evaluated by superimposing methods via CAD reference data and CAD specimen data. Within the limits of this study, a thickness of 0.3 mm is recommended for the clinical application of polymer-based CAD/CAM blocks in dental restorations that require superior machinability and accuracy. In addition, the machinability and machining accuracy tests of polymer-based CAM blocks are expected to provide guidelines for preparing accurate dental restorations.
本研究的目的是使用ISO 18675:2022规定的聚碳酸酯断裂试验模型，评估基于聚合物的计算机辅助制造（CAM）块的可加工性和加工精度。本研究测试了三种混合盘坯（MazicDuro、HC Disk和Enamic）和三种聚甲基丙烯酸甲酯（PMMA）盘坯（PMMA Disk、PMMA Block和MazicTemp Hybrid）。通过根据聚碳酸酯的断裂范围（区域被十个垂直平面划分）分配分数来评估可加工性。通过CAD参考数据和CAD样本数据的叠加方法评估加工精度。在本研究的范围内，对于需要卓越可加工性和精度的牙科修复中基于聚合物的CAD/CAM块的临床应用，建议厚度为0.3毫米。此外，基于聚合物的CAM块的可加工性和加工精度测试有望为制备精确的牙科修复提供指导。
