Patellar (knee cap) realignment procedures are used to treat instability problems at the knee cap joint. Patients with instability of the knee cap suffer from dislocations or feelings of their knee cap slipping. Many times, patients with instability of the knee cap have problems with the alignment of the knee cap (see figures 1 and 2). Some people are born with abnormal alignment of the knee cap and it becomes bothersome after an injury. Other people are born with normal alignment, but develop problems after an injury to their knee cap.