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.
The medial patellofemoral ligament, which is part of the medial retinaculum, is the main injured structure especially regarding normal knee alignment. Therefore, medial retinacular plication, a proximal realignment correction technique, can directly address the main pathology of patellar instability.