The sulcus angle is a measurement of the steepness of the walls of the groove in which the kneecap rides (the trochlear groove).


Patellar instability

This measurement would be taken in patients being investigated for the cause of instability of the patella.


The unstable patella

A discussion about patellar instability, the factors that may cause the patella to sublux or dislocate, and what can be done about it.