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The presence of pamidronate during local use of bisphosphonates (BP)-enriched bone cement was determined. The question was whether pamidronate implanted into the bone cement is eluted. The study was performed on 10 probes of BP-enriched bone cement located in 0.9% NaCl. The probes were incubated for 3 and 6 weeks. Ion-pair HPLC was used for the detection of pamidronate. Then, capillary electrophoresis was applied for quantitative analysis of pamidronate in the 3 rd  and 6 th  week after incubation. The presence of pamidronate, eluted from BP-enriched bone cement into 0.9% NaCl solution 3 and 6 weeks after incubation, was demonstrated. These results may explain the changes in the level of cytokine RANKL and bone turnover marker osteoprotegrin in rats’ serum treated with BP-enriched bone cement 3 and 6 weeks after surgery. The possibility of effective local use of BP-enriched bone cement in veterinary medicine was underlined. The results, and the former conducted research, point out that the clinical applications of BP-enriched bone cement in vivo may have some validity in the future.

Determination of Pamidronate in Bisphosphonate-Enriched Bone Cement by Ion-Pair Hplc and Capillary Electrophoresis