The knee cap (patella) is the bone in front of the knee. It is not uncommon for instability to occur at the patella and in some instances a patellar dislocation can occur. Treatments for this problem typically include strengthening the thigh muscles to prevent re-occurance.
It is important to discuss your specific condition with your doctor to determine what the best treatment is for your condition.
For more specific information, please check with your provider.
Make an appointment here to discuss your specific problem further.
Source and for additional information: American Academy of Orthopaedic Surgeons (AAOS)