patella tilt

Background

Definition

Dislocated Patella

 

Repeated dislocation of patella with minimal trauma

- 15-20% of paediatric acute patella dislocations

- more common girls 

- often bilateral

 

Dislocation occurs unexpectedly when quadriceps contracted with knee in flexion 

 

Direction

 

PFJ OA

EpidemiologyPatella OA Medial Facet

 

1 in 10 patients with symptomatic knees have isolated PFJ OA

 

Aetiology

 

Obesity

Repetitive deep flexion

Malalignment

Lateral patella tightness

Blunt trauma

 

Symptoms

 

Anterior knee pain

- rising from chair