Lamellar bone is mature, woven bone is immature and usually pathological.
Periosteum covers cortical surface.
Remodelling of bone along weightbearing lines Factors influencing healing Nature of fracture. Pre-existing condition e.g. neoplasm, metabolic defect, drugs, vitamin deficiency. Osteomyelitis Almost always bacterial, rarely fungal. Causative organisms Adults - Staph. Children - Haemophilus influenzae, Group B Strep.