Abstract
The patella baja, also called patella infera, is described as a shortening of the patellar tendon. When measuring patellar height, there are different methods,1 one of them is the Insall-Salvati index, which with a value less than 0.8 or a difference of 15% with the contralateral index indicates that we are in the presence of a low patella. In our experience, we prefer to use the Caton-Deschamps index, which defines a low patella when the value is less than 0.6.
In this technical note, we will develop a secondary or acquired case.
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