Implant and Prosthetic Dentistry Unit, Department of Surgical Sciences (DISC), University of Genoa, Ospedale S. Martino (pad. 4), L. Rosanna Benzi 10, 16132 Genoa, Italy.
Department of Civil, Chemical and Environmental Engineering, University of Genoa, Via Montallegro, 1, 16145 Genoa, Italy.
Mater Sci Eng C Mater Biol Appl. 2019 Sep;102:186-191. doi: 10.1016/j.msec.2019.04.036. Epub 2019 Apr 13.
The aim of the present study was to investigate the mechanical characteristics of dental implant frameworks made of unidirectional carbon fiber composite (UF) and to compare them with those provided by multidirectional carbon fiber composite (IF).
8 identical UF samples were used. The samples were initially evaluated by optical microscope and SEM then non-destructive and destructive mechanical tests were performed on 4 samples in order to evaluate dynamic, static elastic modulus, wettability and ultimate strength. The outcomes were compared with those of IF samples tested following the same protocol - data reported in a previous published paper. The remaining 4 samples were aged for 60 days in isotonic saline solution at 37 °C simulating the human saliva. The same tests reported before were performed on the aged samples.
The dynamic elastic modulus was lower for UF (78.1 GPa for UF vs. 92.2 GPa for IF) as well as the static elastic modulus (71.0 GPa for UF vs. 84.5 GPa for IF). The ultimate strength value was 582 MPa for the IF samples and 700 MPa for the UF. The aging process of the UF samples did not show any appreciable variation, with small differences that falls within the experimental error.
Unidirectional carbon fiber-reinforced composite appears suitable for the fabrication of frameworks for implant-supported full-arch dentures. The dynamic elastic modulus was higher for UF while the static elastic modulus was higher for IF. The aging process seems not able to significantly alter the mechanical properties of the material. Further research is needed to evaluate the clinical significance of such outcomes.
本研究旨在研究单向碳纤维复合材料（UF）制成的牙种植体支架的机械特性，并将其与多向碳纤维复合材料（IF）的特性进行比较。
使用 8 个相同的 UF 样本。首先通过光学显微镜和 SEM 对样品进行评估，然后对 4 个样品进行无损和破坏性机械测试，以评估动态、静态弹性模量、润湿性和极限强度。结果与按照相同方案测试的 IF 样本进行比较 - 数据报告在之前发表的一篇论文中。其余 4 个样本在 37°C 的等渗盐溶液中老化 60 天，模拟人体唾液。对老化样本进行了之前报告的相同测试。
UF 的动态弹性模量较低（UF 为 78.1 GPa，IF 为 92.2 GPa），静态弹性模量也较低（UF 为 71.0 GPa，IF 为 84.5 GPa）。IF 样本的极限强度值为 582 MPa，UF 样本为 700 MPa。UF 样本的老化过程没有显示出任何明显的变化，只有在实验误差范围内的微小差异。
单向碳纤维增强复合材料似乎适合用于制造种植体支持的全口义齿支架。UF 的动态弹性模量较高，IF 的静态弹性模量较高。老化过程似乎不能显著改变材料的机械性能。需要进一步研究来评估这些结果的临床意义。
