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In Vivo Murine Model of Continuous Intramedullary Infusion of Particles-A Preliminary Study

In Vivo Murine Model of Continuous Intramedullary Infusion of Particles-A Preliminary Study JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART B-APPLIED BIOMATERIALS Ma, T., Ortiz, S. G., Huang, Z., Ren, P., Smith, R. L., Goodman, S. B. 2009; 88B (1): 250-253

Abstract

Continued production of wear debris affects both initial osseointegration and subsequent bone remodeling of total joint replacements (TJRs). However, continuous delivery of clinically relevant particles using a viable, cost effective, quantitative animal model to simulate the scenario in humans has been a challenge for orthopedic researchers. In this study, we successfully infused blue-dyed polystyrene particles, similar in size to wear debris in humans, to the intramedullary space of the mouse femur for 4 weeks using an osmotic pump. Approximately 40% of the original particle load (85 microL) was delivered into the intramedullary space, an estimate of 3 x 10(9) particles. The visible blue dye carried by the particles confirmed the delivery. This model demonstrated that continuous infusion of particles to the murine bone-implant interface is possible. In vivo biological processes associated using wear debris particles can be studied using this new animal model.

View details for DOI 10.1002/jbm.b.31175

View details for Web of Science ID 000261895300027

View details for PubMedCentralID PMC2597706