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Bone Substitutes as a Drug Delivery of Antibiotics

The aim of the present study was the in vitro investigation of a synthetic bone graft substitute loaded with individual antibiotics for the treatment of osteomyelitis and infectious bone disease. The elution of gentamicin, an aminoglycoside antibiotic, from the NanoBone® products NanoBone® S granules (NBG) and lyophilized NanoBone® (NBP) putty was tested over a period of one week. An indirect photometrically-based detection system was used to measure the released antibiotic concentration. Both materials showed very different release behaviour. After one day lyophilized NanoBone® putty delivered 100% of the gentamicin value, whereas NanoBone® S granules released one-fifth of the used gentamicin level.