| 牙体缺损程度对后牙桩核冠修复牙本质应力影响的三维有限元分析 |
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| 引用本文： | 杜莉,付钢,沈颉飞. 牙体缺损程度对后牙桩核冠修复牙本质应力影响的三维有限元分析[J]. 临床口腔医学杂志, 2005, 21(12): 738-740 |
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| 作者姓名： | 杜莉 付钢 沈颉飞 |
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| 作者单位： | 四川大学华西口腔医院修复科,成都,610041;四川大学华西口腔医院修复科,成都,610041;四川大学华西口腔医院修复科,成都,610041 |
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| 摘 要： | 目的:比较上颌第一磨牙不同程度牙体缺损桩核冠修复后牙本质应力分布情况,探讨牙体剩余量与牙本质应力分布之间的关系。方法:通过磨片法建立上颌第一磨牙桩核冠有限元模型,比较上颌第一磨牙4种不同程度牙体缺损桩核冠修复后的牙本质应力分布情况。结果:后牙牙体水平向缺损量超过其牙冠牙体量1/2时,牙本质应力峰值较高,缺损量在牙冠牙体量1/2以内,对应力峰值无显著影响。结论:当水平向牙体剩余量大于1/2时,剩余牙体组织所受应力较大,上颌第一磨牙的腭根根分叉处是根折的危险区域。
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| 关 键 词： | 应力 三维有限元 桩核冠 |
| 文章编号： | 1003-1634（2005）12-0738-02 |
| 收稿时间： | 2004-08-02 |
| 修稿时间： | 2004-08-02 |
FEA analysis of residual dentin in defected posterion restored with post and core crown |
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| DU Li,FU Gang,SHEN Jie-fei. FEA analysis of residual dentin in defected posterion restored with post and core crown[J]. Journal of Clinical Stomatology, 2005, 21(12): 738-740 |
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| Authors: | DU Li FU Gang SHEN Jie-fei |
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| Affiliation: | Department of Prosthodontics, School of Stomatology , Chengdu 610041, China |
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| Abstract: | Objective:To compare the stress of residue dentin in different defected posterior restored with post and core crown .Method:FEA model was constructed by section and stress in residue dentin was analysed.Result:When the residual is lower than 1/2 ,climax stress occured in the residual dentin .Conclusion:The amount of residual dentin could effect the fracture resistance. |
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| Keywords: | stress three-dimension finite element post and core crown |
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