[Morphology of the tibial tuberosity].
The influence of anterior projection of the tibial tuberosity in the pathogenesis of anterior knee pain syndromes has been given relatively little attention. This point has been investigated by performing a morphological study of 77 knee-joints with a standard radiological method. The knees fell into two groups: one of them included typical patellar syndromes, the other group included knees presenting with some other conditions, mostly meniscal. A subjective evaluation of the shape of the tuberosity was made and correlated with clinical status. An objective rating was attempted by measuring the anterior projection of the tuberosity, in order to eliminate the influence of skeletal size, it was expressed as a ratio between two values. Subjective evaluation of the shapes of the tuberosities was found unreliable. The individual values for the calculated index of anterior projection were found to be scattered for every morphological type. It appeared difficult to conclude that there is a definite proven relationship between hypoplasia of the tuberosity and overloading of the femoro-patellar joint. Evaluation of the anterior projection of the tuberosity should take into account the position of the tuberosity in the coronal plane.