Department of Dental Biomaterials, School of Dentistry, Chonbuk National University, 664-14, Duckjin-dong, Jeonju, 561-756, Republic of Korea.
Department of Prosthodontics, Institute of Oral Bio-Science, School of Dentistry, Chonbuk National University and Research Institute of Clinical Medicine of Chonbuk National University-Biomedical Research Institute of Chonbuk National University, 664-14, Duckjin-dong, Jeonju, 561-756, Republic of Korea.
Odontology. 2019 Jul;107(3):360-367. doi: 10.1007/s10266-018-0407-9. Epub 2019 Jan 4.
This study compares the mechanical properties of commercially available CAD/CAM (Computer-Aided Design/Computer-Aided Manufacturing) millable dental blocks including Vita Enamic, Lava Ultimate, and MAZIC Duro. All the discs were cut in dimension of 1.2 mm in thickness and 12 mm in diameter, ground up to #1200 Sic papers and polished. The biaxial flexure strength of the ceramic discs was measured after thermocycling treatment and the broken surfaces were observed using scanning electron microscopy (SEM). The discs were brushed using a toothbrush testing machine under a 150 g load. Surface roughness and morphology were determined after toothbrushing cycles. Finally, the friction and wear behavior of the materials against an opposing tooth were studied using a reciprocating pin-on-plate test configuration. The vertical loss of dental cusp was measured, and the surface image was examined using field emission scanning electron microscopy (FE-SEM). The biaxial flexural strength data were subjected to Weibull analysis. To compare the significance between the groups, all data were analyzed by one-way analysis (ANOVA). The biaxial flexural strength of the Lava Ultimate and MAZIC Duro materials is significantly higher than that of Vita Enamic. In addition, Lava Ultimate and MAZIC Duro exhibited significantly smoother surfaces than that of Vita Enamic after toothbrushing. Lava Ultimate and MAZIC Duro also showed less wear to the opposing tooth than that of Vita Enamic. In addition, Lava Ultimate possesses more suitable mechanical properties than the Vita Enamic and Mazic Duro for use in oral clinical prosthesis.
本研究比较了三种市售 CAD/CAM（计算机辅助设计/计算机辅助制造）可铣削牙科块的机械性能，包括 Vita Enamic、Lava Ultimate 和 MAZIC Duro。所有圆盘均切割成 1.2 毫米厚和 12 毫米直径的尺寸，研磨至#1200 Sic 砂纸并抛光。在热循环处理后测量陶瓷圆盘的双轴弯曲强度，并使用扫描电子显微镜（SEM）观察断裂表面。使用牙刷试验机在 150g 负载下对圆盘进行刷洗。在刷牙循环后确定表面粗糙度和形貌。最后，使用往复销盘试验配置研究了材料对相对牙齿的摩擦磨损行为。测量牙尖的垂直损失，并使用场发射扫描电子显微镜（FE-SEM）检查表面图像。双轴弯曲强度数据进行威布尔分析。为了比较组间的显著性，所有数据均通过单向分析（ANOVA）进行分析。Lava Ultimate 和 MAZIC Duro 材料的双轴弯曲强度明显高于 Vita Enamic。此外，与 Vita Enamic 相比，Lava Ultimate 和 MAZIC Duro 在刷牙后具有更光滑的表面。与 Vita Enamic 相比，Lava Ultimate 和 MAZIC Duro 对相对牙齿的磨损也更少。此外，Lava Ultimate 比 Vita Enamic 和 Mazic Duro 具有更适合口腔临床修复体的机械性能。
