Local Single-Dose Teriparatide Administration for BRONJ Prevention: Insights from a Rat Model Study.

Area of Science:

• Oral and Maxillofacial Surgery
• Bone Biology
• Pharmacology

Background:

• Bisphosphonate-related osteonecrosis of the jaw (BRONJ) poses significant clinical challenges with uncertain treatment outcomes.
• Teriparatide, a parathyroid hormone analog, shows promise in BRONJ prevention strategies.

Purpose of the Study:

• To investigate the efficacy of a single local dose of teriparatide in preventing BRONJ using an established animal model.
• To evaluate the impact of teriparatide on bone remodeling and necrotic changes in BRONJ.

Main Methods:

• BRONJ was induced in Wistar rats using Zoledronic acid, followed by tooth extraction.
• Teriparatide was administered locally via Gelatamp or direct injection into the vestibule.
• Histopathological analyses assessed bone remodeling, osteoclast activity, inflammation, angiogenesis, and necrosis.

Main Results:

• Both teriparatide administration methods significantly improved bone remodeling and new bone formation compared to controls.
• The injection group demonstrated superior outcomes in bone formation compared to the Gelatamp group (p=0.03).
• Teriparatide treatment significantly reduced necrosis in the Gelatamp group compared to controls (p=0.01).

Conclusions:

• Local teriparatide administration effectively enhances bone remodeling and mitigates necrosis, indicating its potential as a BRONJ preventive agent.
• The findings support further clinical investigation into teriparatide for BRONJ prevention.