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Micro-morphologic changes around biophysically-stimulated titanium implants in ovariectomized rats.

Kivanc Akca1, Ebru Sarac, Ugur Baysal

  • 1Division of Restorative Dentistry, The Jane and Jerry Weintraub Center for Reconstructive Biotechnology, UCLAc School of Dentistry, USA. akcak@hacettepe.edu.tr

Head & Face Medicine
|July 20, 2007
PubMed
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Biophysical stimulation, including pulsed electromagnetic fields (PEMF) and mechanical vibration (MECHVIB), significantly improved bone volume around titanium implants in osteoporotic rats. Mechanical vibration showed greater efficacy in enhancing bone healing.

Area of Science:

  • Biomaterials Science
  • Orthopedics
  • Regenerative Medicine

Background:

  • Osteoporosis impairs bone remodeling, potentially compromising osseointegration of titanium implants.
  • Understanding bone micro-architecture changes around implants in osteoporotic models is crucial for improving treatment outcomes.

Purpose of the Study:

  • To investigate the effects of pulsed electromagnetic field (PEMF) and mechanical vibration (MECHVIB) on bone regeneration around titanium implants in an osteoporotic rat model.
  • To evaluate micro-morphological changes in peri-implant bone subjected to biophysical stimulation.

Main Methods:

  • Ovariectomy was performed in rats to induce osteoporosis, followed by bilateral tibial implantation of titanium fixtures.
  • Animals were divided into control, PEMF, and MECHVIB groups, receiving specific biophysical stimulation protocols for two weeks.

Related Experiment Videos

  • Micro-computed tomography (microCT) was used to analyze relative bone volume and micro-structural parameters in the peri-implant region.

    • Main Results:

    • Both PEMF and MECHVIB significantly increased relative bone volume in the peri-implant area compared to the control group (P < .05).
    • Trabecular number around implants was significantly higher in both stimulation groups versus control (P < .05).
    • No significant differences were observed in trabecular thickness or separation among the groups (P > .05).

    Conclusions:

    • Biophysical stimulation effectively enhances bone volume and quality around titanium implants in osteoporotic bone.
    • Low-magnitude, high-frequency mechanical vibration demonstrated superior efficacy over PEMF in improving relative bone volume for osseointegration.