华西口腔医学杂志Issue(1)：13-17,5.DOI:10.7518/hxkq.2014.01.004
Ⅱ类骨质中正畸微种植体锥度及植入角度对支抗稳定性影响的三维有限元分析
Effect of taper and inserting angle on stability of micro-implants in typeⅡbone with three-dimensional finite element
董晶 1张哲湛 2周国良3
作者信息
- 1. 连云港市中医院口腔科，连云港 222004
- 2. 上海交通大学医学院附属第九人民医院口腔正畸科，上海 200011
- 3. 中国船舶重工集团公司江苏自动化研究所，连云港 222061
- 折叠
摘要
Abstract
Objective To evaluate the effect of taper and inserting angle on stability of micro-implants in type Ⅱ bone and to provide theoretical evidence for clinical selection of taper and inserting angle. Methods Three-dimensional finite element models of type Ⅱ bone sections and micro-implants were fabricated. They were designed using different tapers (diameter between 1.1 to 1.6 mm, taper between 0 to 0.062 5) and different inserting angles ranging from 30° to 90° (30°, 45°, 60°, 75°, 90°). Effects on the maximum von Mises stresses in mandible and micro-implants, as well as on the maximum displacements in micro-implants, were analyzed under an applied 2 N horizontal force. Results The inserting angle had a significant effect on stresses and displacements, with lower distribution of stresses and displacements occurring at 60°. The effect of the taper was also related to the inserting angle. The minimum stresses were 5.013 4 MPa (cortical bone) and 25.131 0 MPa (micro-implant) in model D at 60°. The displacements of micro-implants were proportional to the taper. Conclusion The inserting angle has a significant effect on stability of micro-implants, and the recommended inserting angle is 60°. The influence of taper on the stability of micro-implants is related to the inserting angle. The micro-implant with 0.037 5 taper (maximum diameter is 1.6 mm, minimum diameter is 1.3 mm) is more suitable for type Ⅱ bones.关键词
微种植体/植入角度/锥度/稳定性Key words
micro-implant/inserting angle/taper/stability分类
医药卫生引用本文复制引用
董晶,张哲湛,周国良..Ⅱ类骨质中正畸微种植体锥度及植入角度对支抗稳定性影响的三维有限元分析[J].华西口腔医学杂志,2014,(1):13-17,5.
