Chinese Journal of Tissue Engineering Research ›› 2010, Vol. 14 ›› Issue (30): 5591-5595.doi: 10.3969/j.issn.1673-8225.2010.30.020

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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

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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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