Diagnosis

Partial articular, lateral sagittal fracture (AO/OTA 34B1)

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Partial articular, sagittal, fractures of the lateral patella may be due to direct impact to the front of the knee (eg, dashboard injury).

These are classified by AO/OTA as 34B1 fractures.

The surgeon must not confuse a well-corticated superolateral bipartite patella (see patient examination ) with an acute fracture.

Options
1.  Partial articular, lateral sagittal simple fracture (AO/OTA 34B1.1)
2.  Partial articular, lateral sagittal fragmentary fracture (AO/OTA 34B1.2)

1.  Partial articular, lateral sagittal simple fracture (AO/OTA 34B1.1)

When the fracture pattern is simple, it is classified by AO/OTA as a 34B1.1 fracture.

2.  Partial articular, lateral sagittal fragmentary fracture (AO/OTA 34B1.2)

When the fracture pattern is fragmentary, it is classified by AO/OTA as a 34B1.2 fracture.