The body looks at this as toxic and if it gets absorbed, the liver deals with it mostly as a toxin rather than a nutrient. Eating the chalk will put a large quantity of this material in your body and is not a good idea at all.
This operation can be done either through the same incision as the medial patellofemoral ligament reconstruction or through a larger incision around the knee. It allows the patella to sit more centrally within its groove and not tilt as the patella engages in the trochlear groove.
Dejour and associates based a three-part classification on the level of intersection of the floor of the trochlea with the medial and lateral femoral condyles. Patellofemoral instability. Translation was measured as movement of the posterior tibial plateau in relation to the posterior aspect of the femoral condyles.