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Bone turnover 18 months after a single intravenous dose of zoledronic acid

Zoledronic acid inhibits bone resorption for up to 12 months. It is not known whether the duration of this antiresorptive effect extends beyond this period of time. The aim of this study was to evaluate the changes in bone turnover at 12 months (T12) and 18 months (T18) after a single injection of 4 mg of zoledronic acid.