Chinese Journal of Tissue Engineering Research ›› 2013, Vol. 17 ›› Issue (16): 3018-3025.doi: 10.3969/j.issn.2095-4344.2013.16.024

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Stress and strain of anterior region cantilever fixed partial denture and bone tissue: Three-dimensional finite element analysis

Wang Fei-fei1, Chen Zu-xian2   

  1. 1 Department of Stomatology, the Fourth People’s Hospital of Zhenjiang, Zhenjiang 212001, Jiangsu Province, China
    2 Department of Stomatology, 359 Hospital of Chinese PLA, Zhenjiang 212001, Jiangsu Province, China
  • Received:2012-12-06 Revised:2013-02-15 Online:2013-04-16 Published:2013-04-16
  • Contact: Chen Zu-xian, Master, Attending physician, Department of Stomatology, 359 Hospital of Chinese PLA, Zhenjiang 212001, Jiangsu Province, China chenzuxian@163.com
  • About author:Wang Fei-fei, Associate chief physician, Department of Stomatology, the Fourth People’s Hospital of Zhenjiang, Zhenjiang 212001, Jiangsu Province, China wff15358595833@163.com
  • Supported by:

     the Social Development Fund of Zhenjiang City, No. SH2011041*

Abstract:

BACKGROUND: There are still some controversies for the number, position as well as the force of the implants and the bridge during the clinical repairing of dentition defects with cantilever fixed partial denture.  
OBJECTIVE: To analyze the force conditions of anterior region cantilever fixed partial denture with three-dimensional finite element.
METHODS: The computer was used to simulate the three-dimensional finite element method to analyze the implant-supported fixed dentures, as well as the stress and strain status of implants and surrounding bone tissues with different numbers and different positions of implants located on the cantilever fixed partial denture, in order to provide guiding significance for the clinical application.
RESULTS AND CONCLUSION: When implanted with the same load force and load angle, the maximum equivalent stress of the implants and the surrounding bone was gradually increased with the reducing of the implant number and the increasing of the bridge length, and the minimum safety coefficient was decreased gradually. When the load angle was 22.5°, implants and the surrounding bone showed the lowest maximum stress, and the minimum safety coefficient was highest. With the increasing of the load angle, the maximum stress of the implants and the surrounding bone was increased gradually, and the minimum safety coefficient was decreased. The distribution of the stress was uneven before and after repaired with cantilever fixed partial denture, and stress distribution in supporting bone of abutment mainly concentrated in neck. For the three units of edentulous area, the success rate of repairing was positively correlated with the number of abutment. Reasonable choice of cantilever fixed partial denture and rigidly fixed bridge is the key for the successful of the treatment.

Key words: biomaterials, biomaterial academic discussion, three-dimensional finite element, cantilever fixed partial denture, rigidly fixed bridge, implants, dentition defect, maximum equivalent stress, minimum safety coefficient, other grants-supported paper

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