Skip to main content

Leg/Knee Case 3 Background

Patellar Fracture


Background

Patella fractures classically occur from falling directly onto the patella. These are frequently comminuted and damage articular cartilage. The patella can also fracture from indirect trauma, like a jumping injury when the knee rapidly flexes against a fully contracted quadriceps. These are less comminuted and more likely to be transverse and displaced.

Various subtypes of patella fractures include:

1) Transverse with or without comminution

2) Stellate

3) Longitudinal, marginal, or avulsion

4) Osteochondral fracture with patellar dislocation