Permanent patellar dislocation after a nonoperative treatment of recurrent dislocation of the patella because of trochlear dysplasia: a case report and review of the literatureLippacher, Sabine; Reichel, Heiko; Nelitz, ManfredJournal of Pediatric Orthopaedics B: July 2013 - Volume 22 - Issue 4 - p 325–328 doi: 10.1097/BPB.0b013e32835637bd Femur & Knee Abstract Author Information Abstract Patellar instability is a common knee injury in children and adolescents. After first-time dislocation, a nonoperative course is widespread. In cases of recurrent patellar dislocation, operative therapy is widely recommended. This case report shows the complicating history after a period of numerous patellar dislocations with primarily spontaneous reduction and a nonreducible dislocation at the follow-up 2 years after a nonoperative treatment. Author Information Department of Orthopedic Surgery, University of Ulm, Ulm, Germany Correspondence to Sabine Lippacher, MD, Department of Orthopedic Surgery University of Ulm, Oberer Eselsberg 45, 89081 Ulm, Germany Tel: +49 731 177 5120; fax: +49 731 177 1103; e-mail: email@example.com © 2013 by Lippincott Williams & Wilkins, Inc.