期刊
ANNALS OF ANATOMY-ANATOMISCHER ANZEIGER
卷 206, 期 -, 页码 80-88出版社
ELSEVIER GMBH, URBAN & FISCHER VERLAG
DOI: 10.1016/j.aanat.2015.08.004
关键词
Periodontal ligament; Intraoral device; In vivo; Loading device; Young's modulus
资金
- German Research Foundation, Clinical Research Unit 208 (DFG) [KFO 208]
- Medical Faculty of the University of Bonn [KFO 208]
The periodontal ligament is a complex tissue with respect to its biomechanical behaviour. It is important to understand the mechanical behaviour of the periodontal ligament during physiological loading in healthy patients as well as during the movement of the tooth in orthodontic treatment or in patients with periodontal disease, as these might affect the mechanical properties of the periodontal ligament (PDL). Up to now, only a limited amount of in vivo data is available concerning this issue. The aim of this study has been to determine the time dependent material properties of the PDL in an experimental in vivo study, using a novel device that is able to measure tooth displacement intraorally. Using the intraoral loading device, tooth deflections at various velocities were realised in vivo on human teeth. The in vivo investigations were performed on the upper left central incisors of five volunteers aged 21-33 years with healthy periodontal tissue. A deflection, applied at the centre of the crown, was linearly increased from 0 to 0.15 mm in a loading period of between 0.1 and 5.0 s. Individual numerical models were developed based on the experimental results to simulate the relationship between the applied force and tooth displacement. The numerical force/displacement curves were fitted to the experimental ones to obtain the material properties of the human PDL. For the shortest loading time of 0.1 s, the experimentally determined forces were between 7.0 and 16.2 N. The numerically calculated Young's modulus varied between 0.9 MPa (5.0 s) and 1.2 MPa (0.1 s). By considering the experimentally and numerically obtained force curves, forces decreased with increasing loading time. The experimental data gained in this study can be used for the further development and verification of a multiphasic constitutive law of the PDL. (C) 2015 Elsevier GmbH. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据