两种上颌无牙颌种植固定修复方案的有限元分析

doi:10.13701/j.cnki.kqyxyj.2019.10.006

口腔医学研究 ›› 2019, Vol. 35 ›› Issue (10): 931-935.DOI: 10.13701/j.cnki.kqyxyj.2019.10.006

两种上颌无牙颌种植固定修复方案的有限元分析

木志翔, 刘婷, 陈陶, 王超, 黄元丁^*

重庆医科大学附属口腔医院,口腔疾病与生物医学重庆市重点实验室,重庆市高校市级口腔生物医学工程重点实验室重庆 401147

收稿日期:2019-02-16 出版日期:2019-10-28 发布日期:2019-10-22
通讯作者: 黄元丁,E-mail:huangyd@hospital.cqmu.edu.cn
作者简介:木志翔(1993~ ),男,浙江人,硕士在读,研究方向:口腔种植学。
基金资助:
国家自然科学基金青年项目(编号:31100690)重庆市卫生计生委面上项目(编号:2017MSXMD73)重庆高校创新团队建设计划资助项目(编号:CXTDG201602006)重庆市高校市级口腔生物医学工程重点实验室资助项目(渝教科[2015]55号)重庆医科大学附属口腔医院科研培育项目(PYM201605)

Finite Element Analysis of Two Fixed Prosthesis Treatment Concepts in Atrophic Maxilla.

MU Zhixiang, LIU Ting, CHEN Tao, WANG Chao, HUANG Yuanding^*

Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing Key Laboratory of Oral Diseases and Biomedical Science, Affiliated Stomatological Hospital of Chongqing Medical University, Chongqing 401147, China.

Received:2019-02-16 Online:2019-10-28 Published:2019-10-22

摘要/Abstract

摘要： 目的:应用有限元分析法从生物力学角度比较以4颗种植体支持的两种固定修复方案的优劣。方法:建立方案模型:常规组模型为临床all-on-4方案,即2颗种植体垂直植入上颌骨的侧切牙区,另2颗种植体倾斜45°植入第二前磨牙区;而改良组模型与前者的区别是在第二前磨牙区应用两颗短植体的垂直植入取代前者的倾斜植入。随后通过加载不同的载荷条件(条件一:倾斜载荷于切牙区;条件二:倾斜载荷于磨牙区)并进行有限元分析。结果:在两种载荷条件下,常规组及改良组中上颌骨及种植体的应力峰值均未超过其屈服强度。但在颌骨上,相较于改良组,常规组显示出更为集中的应力分布。结论:两种方案均可用于无牙颌上颌骨的修复重建。与常规all-on-4方案相比,改良组在上颌骨上表现出更为理想的von-Mises应力分布。上述结果为种植支持式全口固定修复方案的制定提供了生物力学角度的参考。

关键词: all-on-4, 短植体, 倾斜植体, 有限元分析

Abstract: Objective: To compare two fixed prosthesis treatment concepts supported by four implants in an atrophic maxilla. Methods: Two different treatment concept models were constructed. The conventional group was two mesial vertical implants in the lateral incisor regions and two distal tilted (45°) implants in the second premolar regions of the maxilla. The modified group was two mesial vertical implants in the lateral incisor regions and two short vertical implants in the second premolar regions of the maxilla. Numerical simulation was performed under two loading types. Results: Under the first loading type, the conventional group showed a higher stress concentration than the modified group in the bones. For the implants, the peak of von-Mises stress of the conventional group was lower than that of the modified group. Under the second loading type, the conventional group showed higher stress concentrations than the modified group, either on the bones or on the implants. Conclusion: Both treatment concepts can be applied in edentulous maxilla. Compared to the conventional group, the modified group can transmit less occlusal force to the supporting tissues.

Key words: all-on-4, short implant, tilted implant, finite element analysis

木志翔, 刘婷, 陈陶, 王超, 黄元丁. 两种上颌无牙颌种植固定修复方案的有限元分析[J]. 口腔医学研究, 2019, 35(10): 931-935.

MU Zhixiang, LIU Ting, CHEN Tao, WANG Chao, HUANG Yuanding. Finite Element Analysis of Two Fixed Prosthesis Treatment Concepts in Atrophic Maxilla.[J]. Journal of Oral Science Research, 2019, 35(10): 931-935.

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两种上颌无牙颌种植固定修复方案的有限元分析

Finite Element Analysis of Two Fixed Prosthesis Treatment Concepts in Atrophic Maxilla.

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