2015 ISAKOS Biennial Congress ePoster #1914

Recurrent Patellar Dislocation Secondary to Severe Trochlear Dysplasia Treated with Trochleoplasty. Case Series

Cristian Godoy Barrios, MD, Viña Del Mar CHILE
Harold Reid, MD, Concon, Valparaiso CHILE
Fernando Soto, MD, Viña Del Mar, Valparaiso CHILE
Gonzalo Seron, MD, Viña Del Mar, Valparaiso CHILE
Cristobal Acuña, MD, Viña Del Mar, Valparaiso CHILE

Hospital Naval de Viña el Mar, viña del mar, valparaiso, CHILE

FDA Status Not Applicable

Summary: alternative treatment in recurrent patellar dislocation secondary to severe trochlear dysplasia




Patellar instability may be associated with trochlear dysplasia. Trochleaplasty is a surgical procedure which strives to deepen the trochlear groove. We evaluated the clinical and radiological effect of trochleaplasty in patients with severe trochlear displasia in Almirante Nef Navy Hospital, Viña del Mar, Chile.
Patients and methods:
This retrospective study reports the operative technique of a consecutive case series of 7 patients (7 knees), mean age 21,2 years (range, 15-43 ) who underwent modified Dejour (4) and Bereiter (3) technichs trochleoplasty for patellofemoral instability associated with severe trochlear dysplasia type B and D. Other contributing factors of patellar instability were also corrected as part of the surgical procedure: medial tibial tuberosity transfer (n = 5), MPFL reconstruction (n = 5).


Mean follow-up was 34 months ( range, 4 to 64 months). No cases showed recurrent patellofemoral instability. Mean Kujala score were 90 points at last follow-up. One patient required reinterventions to MPFL reconstruction, no revision was done for tibial tuberosity non-union. Radiological signs of trochlear dysplasia were corrected.


Patellofemoral instability with underlying severe trochlear dysplasia can be treated successfully by trochleaplasty in asociation with other surgical techniques as LPFM or tibial tuberosity transfer.