In a normally functioning knee, the kneecap fits nicely in the femoral groove. The femoral groove is a part of the thighbone which accommodates the kneecap’s movement. When the kneecap slips out of the groove it is considered to be unstable and can cause pain and other knee problems. This slip occurs when the groove is uneven or too shallow or when the kneecap has suffered a sharp blow. A partial or complete dislocation can result from this slip and will need treatment in order to put the kneecap back into the proper place. Treatments include both surgical and non-surgical options.