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Mechanical basis for bone retention around dental implants.

Harold Alexander1, John L Ricci, George J Hrico

  • 1Orthogen Corporation, 505 Morris Avenue, Suite 104, Springfield, New Jersey 07081, USA. halexander@orthogencorp.com

Journal of Biomedical Materials Research. Part B, Applied Biomaterials
|April 25, 2007
PubMed
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Laser microgrooving on dental implant collars significantly reduces crestal bone stress. This surface treatment enhances tissue attachment, leading to improved bone retention and potentially minimizing bone loss around implants.

Area of Science:

  • Biomaterials Engineering
  • Dental Implantology
  • Computational Mechanics

Background:

  • Crestal bone loss around dental implants is a significant clinical concern.
  • Implant collar design and surface characteristics influence bone response.
  • Previous studies indicated reduced bone loss with laser-microgrooved implants.

Purpose of the Study:

  • To analytically predict the effect of laser microgrooving on dental implant collars on crestal bone stress.
  • To compare stress distribution around implants with and without collar surface treatment under various loading conditions.

Main Methods:

  • Finite element analysis (FEA) was employed to model a tapered dental implant.
  • Two implant designs were evaluated: control (C) without surface treatment and laser-LL (LL) with microgrooves on the collar.

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  • Axial and side loading simulations were performed with nonbonded and bonded collar/bone interfaces.

    • Main Results:

    • The laser-LL implant demonstrated significantly lower maximum crestal bone stress (22.6 MPa) compared to the control (91.9 MPa) under an 80 N side load.
    • FEA predicted that enhanced tissue attachment to the LL collar reduces stress overload.
    • The bonded interface, simulating the LL surface, showed a marked decrease in stress concentration.

    Conclusions:

    • Laser microgrooving of the implant collar effectively minimizes crestal bone stress.
    • The enhanced tissue attachment facilitated by the LL surface contributes to better crestal bone retention.
    • FEA provides valuable insights into the biomechanical benefits of surface-treated dental implants.