Complications of fracture healing
Defined as healing that has not advanced at the average rate
Usually considered a delayed union if not healed by 4-6months
Strict nonweightbearing immobilisation
Usually considered a nonunion if not healed at 8-9 months (In USA, for reimbursement purposes, Medicare considers a nonunion as being 90 days)
Can be classified as hypertrophic/hypervascular or atrophic/avascular
Usually the end stage of a nonunion.
A fibrocartilaginous surface and joint space develops