pseudarthrosis
Pronunciation: soo-dar-THRO-sis
Formation of a false joint at the site of an ununited fracture.
Full Definition
Pseudarthrosis, also known as nonunion, is the formation of a false joint at a fracture site that has failed to heal. The term literally means 'false joint' and describes the pathological condition where fracture fragments remain mobile due to lack of bony union. Pseudarthrosis may be associated with the formation of fibrous tissue, cartilage, or even synovial fluid between bone ends. This condition typically develops when fractures fail to heal within the expected timeframe and may require surgical intervention including bone grafting, electrical stimulation, or revision fixation to achieve union.
Usage
Usage note: More formal term for nonunion; both terms are clinically acceptable.
In Context
- "CT scan revealed pseudarthrosis at the previous fracture site." — Radiology report
- "The patient developed pseudarthrosis requiring bone grafting and revision fixation." — Surgical consultation