<unk>  is permanent failure of healing following a broken bone unless intervention (such as surgery) is performed. A fracture with<unk>  generally forms a structural resemblance to a fibrous joint, and is therefore often called a "false joint" or pseudoarthrosis (from Greek pseudo-, meaning false, and , meaning joint). The diagnosis is generally made when there is no healing between two sets of medical imaging, such as X-ray or CT scan. This is generally after 6–8 months.<unk>  is a serious complication of a fracture and may occur when the fracture moves too much, has a poor blood supply or gets infected. Patients who smoke have a higher incidence of<unk> . The normal process of bone healing is interrupted or stalled. Since the process of bone healing is quite variable, a<unk>  may go on to heal without intervention in very few cases. In general, if a<unk>  is still evident at 6 months post-injury it will remain unhealed without specific treatment, usually orthopedic surgery. A<unk>  which does go on to heal is called a delayed union.
Nonunion
Pseudofracture
Retrolisthesis
Malunion
Joint dislocation
Intraarticular fracture
Bunion
Stress fracture