pseudarthrosis

Full Definition

Pseudarthrosis, also known as pseudoarthrosis, is the formation of a false joint at a fracture site when normal bone healing fails to occur. This condition develops when there is persistent motion at the fracture site, inadequate blood supply, infection, or other factors that prevent bony union. The fracture ends become rounded and sclerotic, sometimes with synovial-like fluid formation between the bone ends. Treatment typically requires surgical intervention with bone grafting, rigid fixation, and addressing underlying causes.

Usage

Usage note: Both spellings (pseudarthrosis/pseudoarthrosis) are acceptable; distinguish from simple nonunion.

In Context

• "Established pseudarthrosis of the scaphoid required vascularized bone graft reconstruction." — Surgical planning note
• "The patient developed pseudarthrosis at the tibial fracture site despite multiple attempts at fixation." — Complication documentation