Evaluation of the elastic modulus of Beagle's periodontal ligament with nanoindentation technology

VernacularTitle:基于纳米压痕实验的犬牙周膜弹性模量研究
Author: Yipeng FU ¹ ; Yaojun WANG ; Bin WU ; Huixiang HUANG ; Bin YAN
Author Information

1. 南京医科大学附属口腔医院正畸科
Keywords: Periodontal ligament; Nanoindentation; Elastic modulus; Biomechanics
From: Journal of Practical Stomatology 2018;34(2):153-157
CountryChina
Language:Chinese
Abstract: Objective: To evaluate the elastic modulus of Beagle's periodontal ligament(PDL) by means of nanoindentation, and to help build constitutive model of PDL precisely. Methods: 24 cross sections were obtained from the tooth root of lower first molars of beagle dog. With nanoindentation, intrusion and unloading to PDL sites on different planes of long axial and in different directions on the same plane of tooth root were achieved, and the load-displacement curves were obtained, from which the elastic modulus was calculated and analyzed. Results: The elastic modulus of the beagle's periodontal ligament varied from 0. 452-1. 542 Mpa. There was no significant difference in elastic modulus of the beagle's lower first premolar PDL in relation to different planes of long axial, while significant difference was found in different directions (buccal/lingual sides and mesial/distal sides) on the same plane of tooth root(P＜ 0. 05). Conclusion: There was a difference in the elastic modulus of periodontal ligament in buccal/lingual sides and mesial/distal sides of the same tooth root.