title: [The preliminary result of osteoid callus allograft for bone healing].
abstract: OBJECTIVE
  To investigate the feasibility of osteoid callus allograft as a kind of bone healing promoting materials.
  
  
  METHODS
  The osteoid callus was obtained at one week after bilateral femoral fracture of a SD rat, then was kept at -196 C for 2 weeks. The bone defect model which bone repair was in intra-membranous osteogenesis was made at bilateral tibial shaft in 5 rats, and filled with the osteoid callus in the left defect area, the right side was filled with allogenous cancellous as control group. The specimen were processed with undecalcified technique and the sections were staining with light blue and sofranin T.
  
  
  RESULTS
  After 2 weeks, there were cartilage and bone formation in the defect area of osteoid callus graft group(3/4), medullary cavity formation in bone tissue with cartilage arround it, fibrous tissues between new bone and host bone. While there were no cartilage or bone formation in the control group.
  
  
  CONCLUSIONS
  The allograft osteoid callus is not absorbed by immunological rejection, but changed into bone tissue through endochondral osteogenesis. It is inspiring to develop osteoid callus allograft as a kind of material for bone healing.
authors.affiliation: Department of Orthopedic Surgery, Third Teaching Hospital, Peking University, Beijing, P. R. China 100083.
authors.forename: M
authors.initials: M
authors.lastname: Yan
authors.forename: G T
authors.initials: GT
authors.lastname: Dang
mesh_terms: D000818:Animals; D002146:Bony Callus / Q000637:transplantation*; D005264:Femoral Fractures / Q000601:surgery; D017102:Fracture Healing; D005596:Fractures, Closed / Q000601:surgery; D010012:Osteogenesis / Q000502:physiology*; D051381:Rats; D017207:Rats, Sprague-Dawley; D014184:Transplantation, Homologous