outcomes

Patella Baja

Patella Baja

 

Aetiology

 

Congenital

 

Acquired

- trauma

- post ACL reconstruction / TKR

- chronic quadriceps rupture

 

Issues

 

Decreases ROM

Associated with early OA of the PFJ

 

Diagnosis

 

Blackburne-Peel ratio at 30 degrees flexion

 

Patella sleeve fractures

Ossification

 

3 - 5 years old

 

Management

 

Undisplaced

- manage in plaster in extension

 

Displaced > 3 mm

- ORIF

 

Patella sleeve fracture

- usually small inferior fragment seen on xray

- patella high riding on xray / alta

- is actually large cartilaginous fragment avulsed with retinaculum

- can be osteochondral

Facet Joint Dislocation

Definition

 

Facet joint dislocations secondary flexion distraction injury

 

Epidemiology

 

10%

 

Stages

 

1. Unifacet subluxation - interspinous process widening

2. Unifacet dislocation - 25% anterolisthesis

3. Bifacet dislocation - 50% anterolisthesis

4. Complete vertebral translation - 100% anterolisthesis

 

Unilateral Facet Joint Dislocation

 

TFCC tears

Definition

 

Present with pain but not instability

 

Types

 

Traumatic

Degenerative

 

Different treatment algorithms for each

 

History

 

Ulna side wrist pain

- may be worse with rotation

- opening doors and jars

 

History of trauma

 

Examination

 

Local tenderness DRUJ

 

Perilunate dislocations

Epidemiology

 

Young men in 20's and 30's

 

Aetiology

 

High energy injuries

- fall from heights

- MVA

 

Mayfield Classification

 

Injury progresses from radial to ulna

- usually disruption proximal row either side of lunate

 

1.  Capitate usually displaces dorsally initially

- volar lunate dislocation is end stage