期刊
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
卷 135, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jmbbm.2022.105484
关键词
Human periodontal ligament; Hyperelasticity; Collagen fiber; Uniaxial tensile test; Constitutive model
资金
- National Natural Science Founda- tion of China
- Key Research and Develop- ment Program of Jiangsu Province
- Key Medical Research Projects of Jiangsu Health Commission
- Jiangsu Pro- vincial Key Laboratory of Oral Diseases Research Fund
- [82071143]
- [51305208]
- [BE2022795]
- [ZDA202003]
- [JSKLOD-KF- 1901]
In this study, the effect of spatial distribution of collagen fibers on the mechanical properties of human PDL was quantitatively described. The accuracy of the model was verified by uniaxial test data, and the relevant model parameters were obtained, which have certain reference value in subsequent research on hyperelasticity of human PDL and clinical treatment.
Objective: The human periodontal ligament (PDL) dominated by collagen fibers showed hyperelastic mechanical behavior under orthodontic force. Despite previous researches on the hyperelastic model of PDL, there were certain limitations because of the types of samples and the ignorance of distribution of collagen fibers. Therefore, the aim of this study was to quantify the effect of collagen fibers distribution of human PDL on its hyperelastic behavior.Methods: A total of 6 human PDL samples of root neck, root middle and root apex were cut from human maxillary central incisor and lateral incisor. The spatial angles of collagen fibers were observed by optical microscope, the hyperelastic model was constructed combined with the observation results. The quasi-static uniaxial tensile tests with displacement load 0.05 mm/min were carried out, and the test data were used to identify the parameters of model. Results: The mechanical behavior of human PDL conformed to the trend of hyperelastic materials, and greatly depended on the spatial angles of internal collagen fibers. The R2 value statistical fit of the constitutive model to the data is excellent (R2 > 0.98). This model could excellently describe the hyperelastic properties of human PDL.Significance: In this study, we quantitatively described the effect of spatial distribution of collagen fibers on the mechanical properties of human PDL. The accuracy of this model was verified by the uniaxial test data, and the relevant model parameters were acquired, which have certain reference value in subsequent researches on hyperelasticity of human PDL and clinical treatment.
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