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; 88 (1): 250-253


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 PubMedID 18777575