中国组织工程研究

中国组织工程研究 ›› 2010, Vol. 14 ›› Issue (30): 5591-5595.doi: 10.3969/j.issn.1673-8225.2010.30.020

• 数字化骨科 digital orthopedics • 上一篇    下一篇

上颌前牙区非埋入式种植体不同角度基台的三维有限元分析

陈祖贤1，王  超2，樊瑜波2，顾晓明3，韩景芸2，王立军3   

  1. 1辽宁医学院研究生院，辽宁省锦州市  121001；2北京航空航天大学生物与医学工程学院，北京市  100191；3北京武警总医院口腔医学中心，北京市  100039
  • 出版日期:2010-07-23 发布日期:2010-07-23
  • 通讯作者: 王立军，博士，副主任医师，硕士生导师，北京武警总医院口腔医学中心，北京市 100039 wlj6861@yahoo.com.cn
  • 作者简介:陈祖贤★，男，1982年生，浙江省杭州市人，汉族，辽宁医学院在读硕士，医师，主要从事口腔颌面外科的研究。 chenzuxian@163.com

Finite element analysis of the angulate abutment of non-imbedding implant in the anterior maxilla

Chen Zu-xian1, Wang Chao2, Fan Yu-bo2, Gu Xiao-ming3, Han Jing-yun2, Wang Li-jun3   

  1. 1 Graduate School of Liaoning Medical University, Jinzhou  121001, Liaoning Province, China; 2 School of Biological Science and Medical Engineering, Beihang University, Beijing 100191, China; 3 Stomatological Center, General Hospital of Chinese Armed Police Forces, Beijing  100039, China
  • Online:2010-07-23 Published:2010-07-23
  • Contact: Wang Li-jun, Doctor, Associate chief physician, Master’s supervisor, Stomatological Center, General Hospital of Chinese Armed Police Forces, Beijing 100039, China wlj6861@yahoo.com.cn
  • About author:Chen Zu-xian★, Studying for master’s degree, Physician, Graduate School of Liaoning Medical University, Jinzhou 121001, Liaoning Province, China chenzuxian@163.com

PDF

544

被引次数

28

摘要：

背景：研究发现，在上颌前牙区的角度基台增加到25°时，种植体应力增加18%，当种植体的应力增大到其所能承受的范围之外时必然会导致种植失败率的增加，因此角度基台角度肯定不是越大越好。那么到底使用最大多少角度的角度基台不会影响种植的成功率呢？以往的研究并未给予明确的答案。
目的：观察上颌前牙区种植体连接不同角度基台时的应力应变情况，分析种植体的安全系数，确定上颌种植时能用的基台角度。
方法：通过建立三维模型，利用有限元软件计算种植体连接不同角度的角度基台时，种植体及周围骨质的应力分布。
结果与结论：种植体连接不同角度基台时，随基台角度的增大，种植体的最大von-mises应力值逐渐增大，受力部位逐渐向种植体颈部转移，各模型组相互比较，差异具有显著性意义(P < 0.05)。提示上颌前牙区种植为了远期成功率建议最大不要超过25°的角度基台；使用大于25°角度基台时应适当减少其所受牙合力。

关键词: 种植, 角度基台, 有限元, 上颌, 前牙区

Abstract:

BACKGROUND: When the abutment angulations of the upper mandible increase to 25°, the implant stress increases 18%. When the stress increases exceed to the bearing range, the implant is failed. Therefore, greater abutment angulation is not helpful. It remains unclear the maximal angulation that cannot affect implantation success.
OBJECTIVE: To investigate the stress distribution of peri-implant bone which is subjected to different loading conditions when the different abutment angulations are applied, and to analyse the safety factor of the different implants to determine the maximum angulation.
METHODS: The finite element models of the different angulate abutments were established in commercial software packages, and stress distribution of both implant and peri-implant bone were compared.
RESULTS AND CONCLUSION: With the increased abutment angulation, the larger maximum von-Mises stress was observed, and the position of the stress concentration diverted from top of implant to the neck of the implant (P < 0.05). The abutment < 25° is recommended to achieve higher survival rates of dental tooth treatments in the anterior maxilla. When the abutment has to be larger than 25°, it is better to decrease its loading.

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