Inward pointing knee: ct scan measurement with new funtional protocol

Abstract

Patellofemoral malalignment manifest with pain or instability, generating early arthritis. The etiology is multifactorial, and it is a challenge to assess all the factors involved, to perform an individualized treatment. Torsional disorders, both femoral and tibial, has shown their influence in patellofemoral joint. The correlation between femoral anteversion, tibial torsion and foot progression angle, can generate internal or external torsion of the knee. The objective of this study is to present our CT functional patellofemoral joint protocol, with the measurement of the knee internal torsion, in a simulating gait position of the knee in the space, and the description of a torsional index as a new tool for the decision making in treatment. Clinical relevance: this is the first CT protocol that assess the axial torsion of the knee in relationship to the direction of movement of the body.