吉林大学学报（医学版）2016，Vol.42Issue(2)：204-209,6.DOI:10.13481/j.1671-587x.20160203
松质骨和皮质骨厚度对种植体周围应力分布的影响
Influence of thickness of cancellous bone and cortical bone in stress distribution in vicinity of an implant
摘要
Abstract
Objective:To investigate the stress distribution surrounding an implant under different thickness of cancellous bone and cortical bone,and to analyze the influence of thickness ratio and total thickness of bone tissues on the reliability of an implant.Methods:By using the commercial finite element method software Abaqus, a simplified three-dimensional model of a jawbone consisting of a cancellous bone,a cortical bone,an implant,and a ceramic crown was constructed,and then the computation was performed.Under the condition that the system was loaded by lateral and normal stresses, the influence of thickness ratio and total thickness of cancellous bone and cortical bone in the stress distribution surrounding the implant was studied,where the thickness ratios were 3∶1, 2∶1, 1∶1, 1∶2, and 1∶3;the total thickness were 0.5, 1.0, 2.0, 3.0 and 4.0 mm, respectively. Results:The maximum stresses on the cortical bone,the cancellous bone as well as the implant were all found to decrease with the increasing of the total thickness of cortical and cancellous bones,with a higher decreasing rate in the range between 0.5-2.0 mm and a lower decreasing rate between 2.0-4.0 mm. More importantly, the maximum value of stress in the cortical bone within the neck region of the implant was observed to increase dramatically via reducing the total thickness below 2 mm, while it was increased insignificantly when the total thickness was above 2.0 mm. Conclusion:The thickness ratio and the total thickness of cancellous bone and cortical bone have strong influence in the stress distribution surrounding the implant.In dental implantation surgery, the total thickness of cancellous bone and cortical bone should be at least 2 mm, and therefore 2 mm is an optimal value.关键词
皮质骨/松质骨/种植体/有限元分析/骨质厚度/厚度比例Key words
cancellous bone/cortical bone/implant/finite element analysis/bone thickness/thickness ratio分类
医药卫生引用本文复制引用
陈庆生,陈笑风,单晔杰,丁熙,王慧明..松质骨和皮质骨厚度对种植体周围应力分布的影响[J].吉林大学学报（医学版）,2016,42(2):204-209,6.基金项目
国家自然科学基金资助课题 （）
