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Related Experiment Videos

Mandibular deformation in subjects with osseointegrated implants.

J A Hobkirk1, J Schwab

  • 1Department of Prosthetic Dentistry, Institute of Dental Surgery, London.

The International Journal of Oral & Maxillofacial Implants
|January 1, 1991
PubMed
Summary

Osseointegrated implants in the jaw can move up to 420 microns and transmit 16 N forces during jaw movements. These movements, especially during active opening, may harm implant stability and surrounding bone.

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Area of Science:

  • Biomaterials Science
  • Dental Implantology
  • Biomechanics

Background:

  • Osseointegrated (OI) implants are crucial for replacing missing teeth.
  • Understanding forces and movements on mandibular implants is essential for long-term success.

Purpose of the Study:

  • To measure relative movement and force transmission between OI implants in the edentulous mandible.
  • To assess the impact of jaw movements on implant stability.

Main Methods:

  • Utilized intraoral transducers connected to OI implants in the premolar regions.
  • Measured deformations and force transmission during various jaw movements (rest, opening, protrusion, lateral excursions).

Main Results:

  • Observed deformations up to 420 microns and force transmission up to 16 N.

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  • Greater displacements and forces occurred during active opening and protrusion compared to lateral excursions.
  • Significant inter-subject variability in measured forces and displacements was noted.

    • Conclusions:

    • Jaw movements generate significant forces and displacements on mandibular OI implants.
    • These forces may pose a risk to the implant-bone interface and superstructure components.
    • Further research is needed to understand the long-term clinical implications of these biomechanical phenomena.