This podcast covers the JBJS issue for December 2013. Featured are articles covering: The Natural Progression of Synovial Fluid White Blood-Cell Counts and the Percentage of Polymorphonuclear Cells After Primary Total Knee Arthroplasty - A Multicenter Study; Efficacy and Safety of Recombinant Human Bone Morphogenetic Protein-2 Calcium Phosphate Matrix for Closed Tibial Diaphyseal Fracture - A Double-Blind, Randomized, Controlled Phase-II-III Trial; recorded commentary by Dr. Collinge; Periprosthetic Joint Infection Increases the Risk of One-Year Mortality; The Devastating Effects of Tibial Nonunion on Health-Related Quality of Life; recorded commentary by Dr. Kreder.