上海口腔医学

上海口腔医学 ›› 2025, Vol. 34 ›› Issue (5): 472-476.doi: 10.19439/j.sjos.2025.05.004

• 论著 • 上一篇    下一篇

3种咬合状态及冠根比条件下单颗上前牙种植修复的三维有限元分析

梁雄穗1, 黎宴伶2, 黄信1, 马莉3, 汪孟闯1, 陈烨卿4, 梁宇晨4, 邓敏1   

  1. 1.右江民族医学院附属医院 口腔科,广西 百色 533000;
    2.玉林市红十字会医院 口腔科,广西 玉林 537000;
    3.南宁市第九人民医院 口腔科,广西 南宁 530100;
    4.右江民族医学院,广西 百色 533000
  • 收稿日期:2024-07-15 修回日期:2024-08-21 出版日期:2025-10-25 发布日期:2025-10-31
  • 通讯作者: 邓敏,E-mail:dm8807039@126.com]
  • 作者简介:梁雄穗（1998-）,女,在读硕士研究生,E-mail:28954131@qq.com
  • 基金资助:
    2025年自治区级大学生创新创业训练计划项目(S202510599086); 2024年自治区级大学生创新创业训练计划项目（S202410599106）

Three-dimensional finite element analysis of single anterior implant restoration under three occlusal conditions based on design of crown root ratio

Liang Xiongsui1, Li Yanling2, Huang Xin1, Ma Li3, Wang Mengchuang1, Chen Yeqing4, Liang Chenyu4, Deng Min1   

  1. 1. Department of Stomatology, Affiliated Hospital of Youjiang Medical University for Nationalities. Baise 533000;
    2. Department of Stomatology, Yulin Red Cross Hospital. Yulin 537000;
    3. Department of Stomatology, Nanning Ninth People's Hospital. Nanning 530100;
    4. Youjiang Medical University for Nationalities. Baise 533000, Guangxi Zhuang Autonomous Region, China
  • Received:2024-07-15 Revised:2024-08-21 Online:2025-10-25 Published:2025-10-31

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摘要： 目的:构建不同冠根比（crown-to-implant ratio, CIR）的上颌前牙三维模型,在不同咬合状态下,分析种植修复义齿模型及周围骨组织的应力分布。方法:利用SolidWorks建模软件建立平台转移量为0.4 mm,CIR分别为1:1、1.5:1、2:1的三组中切牙种植修复模型,设置对刃、浅覆和深覆三种咬合方式,与牙长轴呈45°加载100 N的力,运用Ansys Workbench 分析各模型受力后Von Mises应力分布及应力峰值。结果:Von-Mises应力峰值为对刃>浅覆>深覆。对刃和浅覆时,基台、基台螺丝和皮质骨的等效应力峰值与CIR呈正比。深覆时,基台、基台螺丝和皮质骨应力值变化不明显。对刃、浅覆时,模型应力集中部位为基台颈部、基台螺丝中部和种植体-骨边缘处。结论:CIR增大,种植模型侧向受力时应力增大,当CIR≥1.5:1时,基台和基台螺丝上的von-Mises应力峰值超过纯钛的屈服强度,临床上应慎用该CIR。模型受到侧向力时,基台颈部和螺丝中部易发生疲劳,修复时应减小种植义齿的侧向受力。

关键词: 种植修复, 冠根比, 三维有限元, 上颌前牙

Abstract: PURPOSE: By constructing a three-dimensional model of anterior teeth with different crown-to-root ratios, the stress distribution and fatigue state of the implant denture model were analyzed under different occlusion conditions. METHODS: SolidWorks modeling software was used to establish a platform switching amount of 0.4 mm and the corresponding crown-root ratio of 1∶1, 1.5∶1, 2∶1 were constructed, and a total of 3 groups of incisor implant restoration models were constructed. In the Ansys Workbench analysis software, the central incisors were designed to have three kinds of occlusion modes, edge to edge occlusion, shallow overbite, deep overbite, and the loading force was 100 N at 45° with the long axis of the teeth. The peak value and distribution of von-Mises stress of implant and implant-bone interface in each group were analyzed. RESULTS: The peak von-Mises stress was edge to edge occlusion > shallow overbite > deep overbite. The peak values of equivalent stress of abutment, abutment screw and cortical bone increased with the increase of crown-root ratio when edge to edge occlusion and shallow overbite were chosen. There was no significant change in the stress value of the abutment, the abutment screw and the cortical bone during deep overbite. The stress concentration parts of the mode, when the posterior teeth were subjected to lateral force and the anterior teeth were edge to edge occlusion and shallow overbite, the stress concentration occurred at the abutment neck, the middle of the abutment screw and the implant-bone edge. CONCLUSIONS: With the increase of crown to root ratio, the lateral stress of the planting model increases; when the crown-to-root ratio ≥1.5∶1, the peak von-Mises stress on the abutment and the abutment screw exceeds the yield strength of pure titanium. When the model is subjected to lateral force, the neck of the abutment and the middle of the screw are prone to experience fatigue. The lateral force of the implant denture should be reduced during repair.

Key words: Implant restoration, Crown root ratio, Finite element analysis, Maxillary anterior teeth

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