Chinese Journal of Tissue Engineering Research ›› 2011, Vol. 15 ›› Issue (48): 8960-8963.doi: 10.3969/j.issn.1673-8225.2011.48.008

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Structural optimization and three-dimensional finite element analysis of functionally graded dental implants

Sun Jian1, Xiong Yao-yang1, Li Yuan-chao2, Sun Fang3, Zhang Fu-qiang1   

  1. 1Department of Prosthodontics, the Ninth Affiliated People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology, Shanghai  200011, China
    2School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai  200240, China
    3Engineering Research Center of Digital Medicine, Ministry of Education, Shanghai Jiao Tong University, Shanghai  200030, China
  • Received:2011-06-09 Revised:2011-08-04 Online:2011-11-26 Published:2011-11-26
  • Contact: Zhang Fu-qiang, Doctor, Professor, Department of Prosthodontics, the Ninth Affiliated People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology, Shanghai 200011, China fqzhang@vip.163.com
  • About author:Sun Jian☆, Doctor, Associate chief physician, Department of Prosthodontics, the Ninth Affiliated People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology, Shanghai 200011, China doctorsunjian74@yahoo.com.cn
  • Supported by:

    Science and Technology Foundation of Shanghai, No. 09ZR1416600*; Biomedical Engineering Integrated Project of Shanghai Jiaotong University, No. YG2009MS38*; Shanghai Key Disciplines (Special Disciplines) Project, No. T0202*; Foundation of Shanghai Science and Technology Commission, No. 08DZ2271100*

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Abstract:

BACKGROUND: The graded design of the titanium and bioceramics will enhance the early osseointegration and maintain the long-term stability.
OBJECTIVE: To investigate the biomechanical behavior of functionally graded dental implant by using three-dimensional finite element method.
METHODS: Three-dimensional elemental models of functionally graded dental implant and partial mandible were established. Three different elastic modulus graded change of functionally graded dental implant were designed: linear, exponential function, logarithmic function, with titanium implant as the control group. Three-dimensional element stress analysis was done by Abaqus software.
RESULTS AND CONCLUSION: Compare to the control group, the stresses were reduced on every level of the implant and bone in the design of the functionally graded dental implant. From the top o the bottom of the implant, the stress on the surface of the implant was reduced by 3% to 50%, while the stress on the implant/bone interface was reduced by 10% to 30%. Among the three graded deigns, the most significant stress reduce was found in the exponential function design. The design of functionally graded dental implant reduce the stresses in the implant/bone interface, the most significant difference is exponential function design.

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