Patella fracture

Patella fracture is one of the common knee injuries usually post direct trauma to the patella or sudden forceful contraction of the quadriceps muscles in a context of sport injury.

Patients present with marked swelling and pain over the patella with point tenderness and marked reduction in extension strength. Usually there is a large joint effusion or hemarthrosis.

There are different causes for patella fracture:

Morphology

Some fractures are more subtle and need to be differentiated from normal variants.

For the treatment of transverse fractures, the classic method is the tension band.

The main differential is of multipartite patella, where there is failure of fusion of secondary ossification centres. The unfused fragments are almost always in the superolateral quadrant of the patella. With a multipartite patella, the volume of the true patella plus that of the smaller ossification centres is greater than that expected of a normal patella. With a patellar fracture, the volume of the fractured components is equivalent to that of a normal patella.

Knee pathology

The knee is a complex synovial joint that can be affected by a range of pathologies:

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Article information

rID: 1357
Tags: stub, refs
Synonyms or Alternate Spellings:
  • Fractured Patella
  • Fracture of patella
  • Patella fractures
  • Fracture of the patella

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