Optimal selections of orthodontic mini-implant diameter and length by biomechanical consideration: A three-dimensional finite element analysis

被引：16
作者：
Jiang, Lin [1 ]
Kong, Liang [1 ,2 ]
Li, Tao [1 ]
Gu, Zexu [1 ]
Hou, Rui [2 ]
Duan, Yinzhong [1 ]
机构：
[1] Fourth Mil Med Univ, Dept Orthodont, Sch Stomatol, Xian 710032, Peoples R China
[2] Fourth Mil Med Univ, Dept Oral & Maxillofacial Surg, Sch Stomatol, Xian 710032, Peoples R China
来源：
ADVANCES IN ENGINEERING SOFTWARE | 2009年 / 40卷 / 11期
关键词：
Mini-implant; Anchorage; Finite element analysis; Diameter; Length; ENDOSSEOUS IMPLANTS; PRIMARY STABILITY; POSTERIOR REGION; ANCHORAGE; BONE; ADOLESCENTS; TORQUE;
D O I：
10.1016/j.advengsoft.2009.05.008
中图分类号：
TP39 [计算机的应用];
学科分类号：
081203 ; 0835 ;
摘要：
A finite element analysis was carried out to evaluate continuous and simultaneous variations of orthodontic mini-implant diameter and length, and to identify their optimal ranges in the maxillary posterior region. Within the ranges of diameter from 1.0 mm to 2.0 mm and the length from 6.0 mm to 16.0 mm, our results showed that the increases of the diameter and length reduced the maximum equivalent stresses in cortical, cancellous bones and mini-implant by 80.94%, 91.84% and 86.11%, respectively, and the maximum displacement in the mini-implant by 81.29%. When the diameter exceeded 1.5 mm and the length exceeded 11.0 mm, the mini-implant achieved the best stability and the lowest levels of stress and displacement. At the similar increment, the change in the diameter was more effective than the change of length in reducing bone-implant complex stresses and enhancing mini-implant stability. Diameter exceeding 1.5 mm in combination with the longest length in safety range were the optimal biomechanical choice for the maxillary posterior region in a screwed orthodontic mini-implant. (C) 2009 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1124 / 1130
页数：7
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