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ORIGINAL RESEARCH Table of Contents   
Year : 2010  |  Volume : 21  |  Issue : 3  |  Page : 349-352
Titanium implants: A removal torque study in osteopenic rabbits


Clinics and Social Dentistry Department, Federal University of Paraíba, Paraíba, Brazil

Correspondence Address:
Carine M Carvalho
Clinics and Social Dentistry Department, Federal University of Paraíba, Paraíba
Brazil
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0970-9290.70798

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Context: Osteoporosis is a skeletal disorder characterized by low bone mass and microarchitectural deterioration of bone tissue. It may affect the craniomaxillofacial complex and result in less bone-implant contact. Aims: The objective of this study was to measure the endosseous integration of titanium implants using the removal torque test in low-mineral density experimental animal models. Materials and Methods: Thirty female New Zealand white rabbits were divided into two groups: control (n=14), sham-operated; and test (n=16), ovariectomized. All animals received 2.2 mm Χ 4.0 mm titanium implants in the right tibia, 120 days after ovariectomy or sham surgery. Animals were killed at 7 and 14 weeks of postimplant insertion, when implants were removed by reverse torque rotation using a digital torque meter. Statistical analysis used was Student's t-test. Results and Conclusion: At the 7-week period, the mean torque values for the control and test groups were 11.6 Ncm and 10.4 Ncm, respectively, with no statistical significance. Implant removal torque analysis showed statistically lower values (P<0.05) for the test group at the 14-week period (control=16.7 Ncm and test=9.7 Ncm). The results of this study indicate that hormonal privacy compromise implants biomechanical performance.


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