RT Journal A1 Gulotta, Lawrence V. A1 Wiznia, Daniel A1 Cunningham, Matthew A1 Fortier, Lisa A1 Maher, Suzanne A1 Rodeo, Scott A. T1 What's New in Orthopaedic Research JF The Journal of Bone & Joint Surgery JO The Journal of Bone & Joint Surgery YR 2011 FD November 16 VO 93 IS 22 SP 2136 OP 2141 DO 10.2106/JBJS.K.00981 UL http://dx.doi.org/10.2106/JBJS.K.00981 AB Over the last year, our understanding of the biological basis of orthopaedic pathology and its treatments has expanded. Particular attention continues to be directed toward the role of stem cells for tissue regeneration as well as the role of growth factors for healing augmentation. Substantial advances have also been made in our understanding of the response of stem cells to load, topography, and growth factors. While bench research is promising, recent clinical studies, specifically, those on the use of platelet-rich plasma (PRP), haven fallen short of expectations. The exact reasons for the disconnect between promising basic science research and discouraging clinical results is most likely multifactorial, and further research is needed to identify the various factors critical for success.