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ALP and OPG serum levels in rats 2, 4 and 6 weeks post-surgery. (A) Serum level of ALP and (B) OPG at weeks 2, 4 and 6 post-surgery, under PDLLA intramedullary fixation (PDLLA group) compared to that of Kirschner wire (control group). Values are mean ± standard deviation, *P<0.05. Con, control group; PDLLA, Poly-D-L lactide treated group; ALP, alkaline phosphatase; OPG, osteoprotegerin.
