Matsuzaki Maki, Ayukawa Yasunori, Sakai Nobuo, Matsuzaki Tatsuya, Matsushita Yasuyuki, Koyano Kiyoshi
a Faculty of Dental Science, Section of Implant and Rehabilitative Dentistry, Division of Oral Rehabilitation , Kyushu University , Fukuoka , Japan.
b Faculty of Engineering, Department of Applied Science for Integrated System Engineering , Kyushu Institute of Technology , Fukuoka , Japan.
Comput Methods Biomech Biomed Engin. 2017 Mar;20(4):393-402. doi: 10.1080/10255842.2016.1236370. Epub 2016 Sep 28.
A number of finite element analyses (FEAs) for the dental implant were performed without regard for preload and with all interfaces 'fixed-bonded'. The purpose of this study was comparing the stress distributions between the conventional FEA model with all contacting interfaces 'fixed-bonded' (bonded model) and the model with the interfaces of the components in 'contact' with friction simulated as a preloaded implant (contact model). We further verified the accuracy of the result of the FEA using model experiment. In the contact model, the stress was more widely distributed than in the bonded model. From the model study, the preload induced by screw tightening generated strain at the peri-implant bone, even before the application of external force. As a result, the bonded model could not reproduce the mechanical phenomena, whereas the contact model is considered to be appropriate for analysing mechanical problems.
在不考虑预紧力且所有界面均为“固定粘结”的情况下，对牙种植体进行了多项有限元分析（FEA）。本研究的目的是比较所有接触界面均为“固定粘结”的传统有限元分析模型（粘结模型）与将部件界面“接触”时的摩擦模拟为预紧种植体的模型（接触模型）之间的应力分布。我们使用模型实验进一步验证了有限元分析结果的准确性。在接触模型中，应力分布比粘结模型更广泛。从模型研究来看，即使在施加外力之前，拧紧螺钉产生的预紧力也会在种植体周围骨组织产生应变。因此，粘结模型无法再现力学现象，而接触模型被认为适合分析力学问题。
