Tensile testing of the mechanical behavior of the human periodontal ligament.
Tensile testing of the mechanical behavior of the human periodontal ligament.
复制标题
人类牙周膜机械行为的拉伸测试。
DOI：
10.1186/s12938-018-0607-0
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发表时间：
2018-11-23
影响因子：
3.9
通讯作者：
Markert B
中科院分区：
文献类型：
--
作者：
Wu B;Fu Y;Shi H;Yan B;Lu R;Ma S;Markert B
牙周韧带（PDL）在牙齿运动过程中对牙槽骨的重塑和吸收起着关键作用。预测牙齿在功能载荷下的移动需要对牙体的力学行为有深入的了解，这是牙齿生物力学中的一个关键问题。本研究旨在研究人类上颌中、侧切牙PDL的力学行为。实验结果有助于建立一个准确的正畸人PDL本构模型。人类门牙样本被切成三片。进行了不同加载速率下的单轴拉伸试验。单轴拉伸试验采用垂直于牙根纵轴的横切面（颈、中、尖）。基于应力应变关系的双线性简化，计算了PDL的弹性模量。比较不同区域的弹性模量，探讨影响牙周膜力学行为的因素。所得的应力-应变曲线采用双模E1和E2双线性模型表征，用于量化中切牙和侧切牙对PDL的弹性行为。不同牙（中门牙和侧门牙）在1、3、5 N载荷水平下的弹性模量差异有统计学意义。结果表明，人门牙牙体的力学性能与牙体位置有关（方差分析，P = 0.022, P < 0.05）。中间面弹性模量大于颈、尖面弹性模量。然而，在颈椎、正中和根尖平面，近端和远端部位的弹性模量无显著差异（方差分析，P = 0.804, P < 0.05）。在1 ~ 5 n的载荷作用下，PDL的弹性模量在0.607 ~ 4.274 MPa范围内。PDL的弹性行为受载荷速率、齿型、牙根水平和个体差异的影响。
The periodontal ligament (PDL) plays a key role in alveolar bone remodeling and resorption during tooth movements. The prediction of tooth mobility under functional dental loads requires a deep understanding of the mechanical behavior of the PDL, which is a critical issue in dental biomechanics. This study was aimed to examine the mechanical behavior of the PDL of the maxillary central and lateral incisors from human. The experimental results can contribute to developing an accurate constitutive model of the human PDL in orthodontics. The samples of human incisors were cut into three slices. Uniaxial tensile tests were conducted under different loading rates. The transverse sections (cervical, middle and apex) normal to the longitudinal axis of the root of the tooth were used in the uniaxial tensile tests. Based on a bilinear simplification of the stress–strain relations, the elastic modulus of the PDL was calculated. The values of the elastic modulus in different regions were compared to explore the factors that influence the mechanical behavior of the periodontal ligament. The obtained stress–strain curves of the human PDL were characterized by a bilinear model with two moduli (E1 and E2) for quantifying the elastic behavior of the PDL from the central and lateral incisors. Statistically significant differences of the elastic modulus were observed in the cases of 1, 3, and 5 N loading levels for the different teeth (central and lateral incisors). The results showed that the mechanical property of the human incisors’ PDLs is dependent on the location of PDL (ANOVA, P = 0.022, P < 0.05). The elastic moduli at the middle planes were greater than at the cervical and apical planes. However, at the cervical, middle, and apical planes, the elastic moduli of the mesial and distal site were not significantly different (ANOVA, P = 0.804, P > 0.05). The values of elastic modulus were determined in the range between 0.607 and 4.274 MPa under loads ranging from 1 to 5 N. The elastic behavior of the PDL is influenced by the loading rate, tooth type, root level, and individual variation.
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影响因子：
3.8
作者：
Chan, RW;Titze, IR
通讯作者：
Titze, IR
影响因子：
2.4
作者：
Pini, M;Zysset, P;Contro, R
通讯作者：
Contro, R
DOI：
10.4061/2010/502318
发表时间：
2010-01-01
期刊：
Journal of dental biomechanics
影响因子：
--
作者：
Komatsu, Koichiro
通讯作者：
Komatsu, Koichiro
DOI：
10.1080/10255840290032117
发表时间：
2002-04-01
影响因子：
1.6
作者：
Pietrzak, G;Curnier, A;Belser, U
通讯作者：
Belser, U
影响因子：
2.4
作者：
Bergomi, Marzio;Cugnoni, Joel;Wiskott, H. W. Anselm
通讯作者：
Wiskott, H. W. Anselm