探讨分级模型对骨质疏松条件下骨-牙种植体系统生物力学行为的影响。
Investigation of the effects of graded models on the biomechanical behavior of a bone-dental implant system under osteoporotic conditions.
机构信息
Ying Li, DDS, Institute of Hard Tissue Development and Regeneration, the Second Affiliated Hospital of Harbin Medical University, Harbin 150001, China.
Zhong Shuang Liu, DDS, Institute of Hard Tissue Development and Regeneration, the Second Affiliated Hospital of Harbin Medical University, Harbin 150001, China.
出版信息
Pak J Med Sci. 2013 Apr;29(2):619-24. doi: 10.12669/pjms.292.2963.
OBJECTIVE
To investigate the effects of graded models on the biomechanical behavior of a bone-implant system under osteoporotic conditions. Methodology : A finite element model (FEM) of the jawbone segments with a titanium implant is used. Two types of models (a graded model and a non-graded model) are established. The graded model is established based on the graded variation of the elastic modulus of the cortical bone and the non-graded model is defined by homogeneous cortical bone. The vertical and oblique loads are adopted. The max von Mises stresses and the max displacements of the cortical bone are evaluated.
RESULTS
Comparing the two types of models, the difference in the maximum von Mises stresses of the cortical bone is more than 20%. The values of the maximum displacements in the graded models are considerably less than in the non-graded models.
CONCLUSIONS
These results indicate the significance of taking into account the actual graded properties of the cortical bone so that the biomechanical behavior of the bone-implant system can be analyzed accurately.
目的
研究分级模型对骨质疏松条件下骨-种植体系统生物力学行为的影响。
方法
采用带有钛植入物的颌骨片段的有限元模型（FEM）。建立两种类型的模型（分级模型和非分级模型）。分级模型基于皮质骨弹性模量的分级变化而建立，非分级模型则由均质皮质骨定义。采用垂直和倾斜载荷。评估皮质骨的最大 von Mises 应力和最大位移。
结果
比较两种类型的模型，皮质骨的最大 von Mises 应力差异超过 20%。分级模型中的最大位移值明显小于非分级模型。
结论
这些结果表明，考虑皮质骨实际分级特性的重要性，以便能够准确分析骨-种植体系统的生物力学行为。
Zotero 插件