Radionuclide bone imaging, biomechanical, and BMD evaluation. For blood pool imaging (a) and metabolic phase imaging (b), the count uptake ratio of ROI in group A was significantly higher than that in groups B and C at weeks two, four and eight postoperatively (P < 0.05). The EPC treatment group also had a significantly higher torsional strength when compared with groups B (P = 0.023) and C (P = 0.000) (c). During four to 12 weeks postoperatively, BMD of rabbit radii in group A were significantly higher than that of groups B and C (d). *P < 0.05 compared to group B, #P < 0.05 vs. group C