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Stress-absorbing elements in dental implants.

I P van Rossen1, L H Braak, C de Putter

  • 1Department of Oral implantology, The Netherlands.

The Journal of Prosthetic Dentistry
|August 1, 1990
PubMed
Summary
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Finite element analysis revealed that stress-absorbing elements in dental implants do not significantly alter bone stress, though a low E-modulus can improve stress distribution around implants connected to natural teeth.

Area of Science:

  • Biomaterials Engineering
  • Biomechanics
  • Dental Implantology

Background:

  • Dental implants aim to restore function and aesthetics, but stress shielding and excessive stress concentration in surrounding bone can lead to implant failure.
  • Understanding stress distribution is crucial for designing effective dental implant systems and stress-absorbing components.

Purpose of the Study:

  • To investigate the impact of stress-absorbing elements on stress distribution in bone tissue around dental implants using finite element analysis.
  • To evaluate how variations in the elastic modulus (E-modulus) and shape of stress-absorbing elements affect stress patterns in cortical and trabecular bone.

Main Methods:

  • Finite element analysis (FEA) was employed to model bone-implant systems.
  • Simulations were conducted for freestanding implants and implants connected to natural teeth, with and without stress-absorbing elements of varying properties.

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Main Results:

  • The E-modulus of stress-absorbing elements had no significant effect on bone stresses for freestanding implants.
  • Altering the shape of stress-absorbing elements showed minimal impact on stresses within the cortical bone.
  • For implants connected to natural teeth, a low E-modulus stress-absorbing element resulted in more uniform stress distribution around the implant.
  • The bone adjacent to the natural tooth experienced a reduction in peak stress height when using a low E-modulus stress-absorbing element.

Conclusions:

  • Stress-absorbing elements may offer benefits in specific configurations, particularly for implants splinted to natural teeth, by promoting more even stress distribution.
  • The mechanical properties and design of stress-absorbing elements warrant careful consideration to optimize stress transfer and potentially enhance long-term implant success.