Teicoplanin-Loaded Borate Bioactive Glass Implants for Treating Chronic Bone Infection in a Rabbit Tibia Osteomyelitis Model
The treatment of chronic osteomyelitis (bone infection) remains a clinical challenge. In this work, pellets composed of a chitosan-bonded mixture of borate bioactive glass particles (< 50 μm) and teicoplanin powder (antibiotic), were evaluated in vitro and in vivo for treating chronic osteomyelitis induced by methicillin-resistant Staphylococcus aureus (MRSA) in a rabbit model. When immersed in phosphate-buffered saline, the pellets showed sustained release of teicoplanin over 20-30 days, while the bioactive glass converted to hydroxyapatite (HA) within 7 days, eventually forming a porous HA structure. Implantation of the teicoplanin-loaded pellets in a rabbit tibia osteomyelitis model resulted in the detection of teicoplanin in the blood for about 9 days. The implants converted to a bone-like HA graft, and supported the ingrowth of new bone into the tibia defects within 12 weeks of implantation. Microbiological, histological and scanning electron microscopy techniques showed that the implants provided a cure for the bone infection. The results indicate that the teicoplanin-loaded borate bioactive glass implant, combining sustained drug release with the ability to support new bone ingrowth, could provide a method for treating chronic osteomyelitis.
X. Zhang and W. Jia and Y. Gu and W. Xiao and X. Liu and D. Wang and C. Zhang and W. Huang and M. N. Rahaman and D. E. Day and N. Zhou, "Teicoplanin-Loaded Borate Bioactive Glass Implants for Treating Chronic Bone Infection in a Rabbit Tibia Osteomyelitis Model," Biomaterials, vol. 31, no. 22, pp. 5865-5874, Elsevier, Aug 2010.
The definitive version is available at http://dx.doi.org/10.1016/j.biomaterials.2010.04.005
Mining and Nuclear Engineering
Materials Science and Engineering
Keywords and Phrases
Osteomyelitis; Bone Infection; Bone Regeneration; Borate Bioactive Glass; Drug Release
International Standard Serial Number (ISSN)
Article - Journal
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