东南大学学报（英文版）2017，Vol.33Issue(1)：33-38,6.DOI:10.3969/j.issn.1003-7985.2017.01.006
纳米压痕法测量牙周膜不同层面弹性模量
Elastic modulus determination at different levels of periodontal ligament in nanoindentation
摘要
Abstract
In order to investigate the material properties of periodontal ligament (PDL) in different locations,the nanoindentation method is used to survey the elastic modulus of the PDL at different levels.Cadaveric specimens of human mandibular canine were obtained from 4 adult donors,16 transverse specimens were made from the sections of cervical margin,midroot and apex using the slow cutting machine.The prepared specimens were tested in different sections (along the longitudinal direction) and different areas (in the circumferential direction).According to the Oliver-Pharr theory,the mean values of elastic modulus were calculated for each area and the differences among them were compared.In the midroot section,the average elastic modulus is ranging from 0.11 to 0.23 MPa,the changing range of the cervical margin and apex are from 0.21 to 0.53 MPa and 0.44 to 0.62 MPa,respectively.Experimental results indicate that the average elastic modulus in the midroot is lower than that in the cervical margin and apex,and relatively small changes occur among them.However,there is a large change to the elastic modulus value in the circumferential direction for the PDL.关键词
牙周膜/弹性模量/纳米压痕/材料特性/尖牙Key words
periodontal ligament (PDL)/elastic modulus/nanoindentation/material properties/canine分类
医药卫生引用本文复制引用
杨宇,汤文成..纳米压痕法测量牙周膜不同层面弹性模量[J].东南大学学报（英文版）,2017,33(1):33-38,6.基金项目
The National Natural Science Foundation of China (No.51305208). （No.51305208）
