An investigation of the viscoelastic properties of the periodontium in monkeys.
An investigation of the viscoelastic properties of the periodontium in monkeys.
复制标题
猴子牙周组织粘弹性特性的研究。
DOI：
10.1111/j.1600-0765.1972.tb00630.x
复制
发表时间：
1972
影响因子：
3.5
通讯作者：
W. R. Davies
中科院分区：
文献类型：
--
作者：
D. J. Wills;D. Picton;W. R. Davies
牙齿对外部应力的非线性响应是由于支持组织的纤维、细胞和血管元素的相互作用。本研究以3只猴子为实验对象，研究了突然去除2.5牛顿轴向力后中门牙的松弛情况。采用指数曲线拟合技术对位移-时间曲线进行了分析。分析表明，牙周组织本质上是粘弹性的，可以用三个甚至五个Voigt元素来表示。上、下切牙的比较表明，虽然下颌骨和上颌骨都有相同的基本突，但它们的大小不同。在作用最快的Voigt单元的情况下，下齿的响应比上齿的响应更快，这对应于更小的阻尼或更强的弹簧常数。这种大小的差异可能是由于牙周组织和牙槽骨结构的不同或局部血液供应的不同。作者感谢伦敦医院医学院M. Braden博士的建议和指导。还要感谢大学学院医院医学物理系的成员，特别是J. S. Clifton先生的鼓励，M. Conway先生和R. Favre先生制造了施力器，K. J. Cassell先生的协助。
The non-linear response of the tooth to external stresses is due to the interaction of the fibrous, cellular and vascular elements of the supportive tissues. In this study the relaxation of the central incisors after the suden removal of axial forces of 2.5 Newton was investigated in three monkeys. The displacement-time curve was analysed using a technique of exponential curve fitting. Analysis shows that the periodontium is viscoelastic in nature and may be represented by three and possibly five Voigt elements. Comparison of the upper and lower incisors indicate that while the same basic processes are active in both mandible and maxilla they are different in magnitude. In the case of the fastest acting Voigt element the response is more rapid for lower teeth than for upper ones, corresponding either to less damping or a stronger spring constant. This difference in magnitude is presumably due either to differences in the architecture of the periodontium and alveolar bone or to the local blood supply. The authors are indebted to Dr. M. Braden of the London Hospital Medical College for his advice and guidance. Thanks are due also to members of the Department of Medical Physics of the University College Hospital, particularly Mr. J. S. Clifton for his encouragement, Mr. M. Conway and Mr. R. Favre for the construction of the force applicator and Mr. K. J. Cassell for his assistance.