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Updated: Feb 7, 2026

Less-Invasive Technique for Non-stabilized Mandibular Fracture in Mouse Models
Published on: September 27, 2024
Does zoledronate therapy make mandibular bone susceptible to fracture? A radiographical and biomechanical study in
Mohammad Zandi1, Abbas Shokri2, Maryam Mousavi3
1Department of Oral and Maxillofacial Surgery, Hamadan University of Medical Sciences, Hamadan, Iran; Dental Research Center, Hamadan University of Medical Sciences, Hamadan, Iran.
Introduction:
The aim of this study was to evaluate the effect of zoledronate therapy on susceptibility of mandibular bone to fracture in rats.
Methods:
Fifty rats were randomly allocated to two groups of 25 animals. The rats in group Z received monthly intravenous infusion of 0.06 mg/kg zoledronate for 6 months. The rats in the group C were injected with an equal volume of saline in the same manner. A month after the last zoledronate/saline administration, all 50 rats were euthanized. Using a cone beam computed tomography, the cortical thickness of inferior border of mandible and the mandibular bone mineral density were calculated, and using a three-point bending test, the peak load failure and the ultimate stress of mandibular bone were determined.
Results:
The mean mandibular inferior cortical bone thickness and the mean bone mineral density were significantly larger in zoledronate-treated rats (0.30 ± 0.02 mm and 1045.00 ± 185.79, respectively) compared to control rats (0.21 ± 0.01 mm and 878.66 ± 166.53, respectively). The peak load and the ultimate stress were lower in the zoledronate-treated hemimandibles (84.61 ± 33.62 N and 1.76 ± 0.72 MPa, respectively) compared to the control hemimandibles (98.36 ± 16.5 9 N and 2.03 ± 0.44 MPa, respectively).
Conclusion:
Zoledronate therapy reduced the mechanical strength of the mandibles, implying an increased risk of mandibular fracture in rats.
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