title: Trochleaplasty for recurrent patellar dislocation in association with trochlear dysplasia. A 4- to 14-year follow-up study.
abstract: We investigated the clinical and radiological outcome of trochleaplasty for recurrent patellar dislocation in association with trochlear dysplasia in 38 consecutive patients (45 knees) with a mean follow-up of 8.3 years (4 to 14). None had recurrence of dislocation after trochleaplasty. Post-operatively, patellofemoral pain, present pre-operatively in only 35 knees, became worse in 15 (33.4%), remained unchanged in four (8.8%) and improved in 22 (49%). Four knees which had no pain pre-operatively (8.8%) continued to have no pain. A total of 33 knees were available for radiological assessment. Post-operatively, all but two knees (93.9%) had correction of trochlear dysplasia radiologically but degenerative changes of the patellofemoral joint developed in 30% (10) of the knees. We conclude that recurrent patellar dislocation associated with trochlear dysplasia can be treated successfully by trochleaplasty, but the impact on patellofemoral pain and the development of patellofemoral osteoarthritis is less predictable. Overall, subjective patient satisfaction with restored patellofemoral stability after trochleaplasty appeared to outweigh its possible sequelae.
authors.affiliation: Department of Orthopaedic Surgery, Schulthess Clinic, Lengghalde 2, 8008 Zurich, Switzerland. fabianvonknoch@yahoo.com
authors.forename: F
authors.initials: F
authors.lastname: von Knoch
authors.forename: T
authors.initials: T
authors.lastname: Böhm
authors.forename: M L
authors.initials: ML
authors.lastname: Bürgi
authors.forename: M
authors.initials: M
authors.lastname: von Knoch
authors.forename: H
authors.initials: H
authors.lastname: Bereiter
mesh_terms: D000293:Adolescent; D000328:Adult; D001848:Bone Diseases, Developmental / Q000150:complications / Q000000981:diagnostic imaging / Q000601:surgery*; D005260:Female; D005269:Femur / Q000000981:diagnostic imaging / Q000601:surgery; D005500:Follow-Up Studies; D006801:Humans; D007593:Joint Instability / Q000150:complications / Q000000981:diagnostic imaging / Q000601:surgery; D007719:Knee Joint / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000601:surgery; D008297:Male; D010147:Pain Measurement; D010329:Patella / Q000000981:diagnostic imaging / Q000601:surgery; D031222:Patellar Dislocation / Q000150:complications / Q000000981:diagnostic imaging / Q000601:surgery*; D011183:Postoperative Complications; D011859:Radiography; D012008:Recurrence; D016896:Treatment Outcome