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Pseudoarthrosis
Pronunciation: SOO-doh-ar-THROH-sis
A false joint formation at a fracture site due to nonunion, creating abnormal motion where bone should be solid.
Full Definition
Pseudoarthrosis, literally meaning 'false joint,' develops when a fracture fails to heal properly and instead forms a fibrous or cartilaginous connection that allows abnormal motion. This condition represents a specific type of nonunion where the bone ends become rounded and smooth, resembling a joint surface. In rehabilitation contexts, pseudoarthrosis often requires surgical intervention before meaningful functional improvement can occur.
Usage
Usage note: Alternative spelling 'pseudarthrosis' is less common but acceptable; prefer the 'o' form in clinical documentation.
In Context
- "Pseudoarthrosis at the scaphoid waist required surgical revision before rehabilitation could progress effectively." — orthopedic consultation note
- "The development of pseudoarthrosis necessitated a complete revision of the patient's rehabilitation timeline." — case management documentation
Also known as
false joint
pseudarthrosis
Contrasted with
solid union
bony union
Don't confuse with
nonunion
delayed union