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Surgical treatment of congenital patellar dislocation in skeletally mature patients: surgical technique and case series

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Abstract

Background

Congenital patellar dislocation is a rarely encountered condition and is readily treated in childhood to prevent lasting disability, knee pain, decreased range of motion and ambulation problems. This condition is very rarely seen in skeletally mature patients, and the treatment of the condition represents a challenge to the orthopedic surgeon.

Surgical technique and methods

Patients were treated with soft tissue reconstruction and tibial tubercle transfer with or without a prior medial close-wedge distal femoral osteotomy, depending on the degree of valgus deformity. We, then, searched the database of our orthopedics center for cases of congenital patellar dislocation in skeletally mature patients who were surgically treated. We collected a total of five knees and analyzed the cases according to the type of surgery performed and difference between pre- and postoperative functions.

Results

Five knees with congenital patellar dislocation were treated. The mean age of the patients was 29.6 years, and mean follow-up time was 4.3 years. Mean preoperative range of motion was 65°, and it increased to a mean of 105.5° after surgical treatment. The mean preoperative Kujala score was 29.2 and increased to 67.2 after surgical treatment.

Discussion

Congenital patellar dislocations that are allowed to proceed to adulthood are difficult to treat, and surgical treatment depends on the degree of deformity of the patella and of the knee joint. This study shows that surgical treatment is able to correct the deformity and provide better knee function.

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Authors and Affiliations

  1. Department of Orthopedics, Building No.6, 8th floor, Shanghai Ruijin Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai Institute of Orthopedics and Traumatology, 197, Ruijin Er Lu, Shanghai, People’s Republic of China

    Sunnassee Yoshvin & Yi Wang MD, PhD

  2. Department of Orthopedics Surgery, Louisiana State University Health Science Center New Orleans, New Orleans, LA, USA

    Edward P. Southern

  3. Institute for Western Surgery, Shanghai, People’s Republic of China

    Edward P. Southern

Authors
  1. Sunnassee Yoshvin
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  2. Edward P. Southern
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  3. Yi Wang MD, PhD
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Correspondence to Yi Wang MD, PhD.

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Yoshvin, S., Southern, E.P. & Wang, Y. Surgical treatment of congenital patellar dislocation in skeletally mature patients: surgical technique and case series. Eur J Orthop Surg Traumatol 25, 1081–1086 (2015). https://doi.org/10.1007/s00590-015-1619-0

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  • DOI: https://doi.org/10.1007/s00590-015-1619-0

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