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Updated: Jun 8, 2026

Surgical Bone Implantation Technique for Rat Tibia Models of Diabetes and Osteoporosis
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Titanium implants: a removal torque study in osteopenic rabbits.

Carine M Carvalho1, Luiz F Carvalho, Lino J Costa

  • 1Clinics and Social Dentistry Department, Federal University of Paraíba, Paraíba, Brazil. carine.markus@gmail.com

Indian Journal of Dental Research : Official Publication of Indian Society for Dental Research
|October 9, 2010
PubMed
Summary

Osteoporosis impairs titanium implant integration in rabbits, with significantly lower removal torque observed at 14 weeks in ovariectomized animals compared to controls. This highlights compromised biomechanical performance due to hormonal changes.

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Area of Science:

  • Biomaterials Science
  • Orthopedic Research
  • Endocrinology

Background:

  • Osteoporosis is a skeletal disorder marked by low bone mass and deterioration.
  • It can negatively impact the craniomaxillofacial complex, reducing bone-implant contact.
  • Understanding osteoporosis's effect on bone-implant integration is crucial for clinical success.

Purpose of the Study:

  • To evaluate the endosseous integration of titanium implants in an experimental osteoporosis model.
  • To quantify implant stability using the removal torque test in animals with low bone mineral density.

Main Methods:

  • Thirty female New Zealand white rabbits were used, divided into control (sham-operated) and test (ovariectomized) groups.
  • Titanium implants were placed in the tibia 120 days post-surgery.

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Last Updated: Jun 8, 2026

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  • Implant removal torque was measured at 7 and 14 weeks using a digital torque meter.

    • Main Results:

    • At 7 weeks, no statistically significant difference in removal torque was found between groups.
    • At 14 weeks, the ovariectomized (test) group showed significantly lower removal torque values (9.7 Ncm) compared to the control group (16.7 Ncm).
    • This indicates a time-dependent negative impact of osteoporosis on implant stability.

    Conclusions:

    • Hormonal changes associated with osteoporosis compromise the biomechanical performance of titanium implants.
    • Implant integration is reduced in low bone mineral density conditions, particularly over longer periods.
    • These findings suggest potential challenges for dental and orthopedic implantology in osteoporotic patients.