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 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. 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: firstname.lastname@example.org © 2013 by Lippincott Williams & Wilkins, Inc.