桩对牙本质应力分布影响的三维有限元分析
Three-dimensional finite element analysis of the effects of posts on stress distribution in dentin.
作者信息
Ho M H, Lee S Y, Chen H H, Lee M C
机构信息
Institute of Biomedical Engineering, National Yang-Ming Medical College, Taipei, Taiwan, Republic of China.
出版信息
J Prosthet Dent. 1994 Oct;72(4):367-72. doi: 10.1016/0022-3913(94)90555-x.
A finite element analysis was conducted to study the influence of posts on dentinal stress in pulpless teeth. Three-dimensional models of an intact Chinese maxillary central incisor with and without post restoration were analyzed. When the tooth was subjected to masticatory and traumatic loads, stress distributions in dentin were similar whether or not the post was present. Maximal dentinal stresses were reduced by only 7% to 10% and 10% to 14.5%, respectively, with gold alloy and stainless steel posts. Thus the reinforcement effects from posts appeared limited in pulpless incisors.
进行了有限元分析，以研究桩对无髓牙牙本质应力的影响。分析了有无桩修复的完整中国上颌中切牙的三维模型。当牙齿受到咀嚼和创伤负荷时，无论有无桩，牙本质中的应力分布相似。使用金合金桩和不锈钢桩时，最大牙本质应力分别仅降低了7%至10%和10%至14.5%。因此，桩在无髓切牙中的增强作用似乎有限。
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