Animals|Bone Marrow Cells|Bone Regeneration|Bone and Bones|Cell Movement|Cell Proliferation|Cell Transplantation|Chondrogenesis|Computer Simulation|Disease Models, Animal|Fractures, Bone|Histocytochemistry|Intercellular Signaling Peptides and Proteins|Models, Biological|Neovascularization, Physiologic|Proliferating Cell Nuclear Antigen|Rats|Rats, Inbred WKY|Statistics, Nonparametric|Wound Healing