ISAKOS: 2019 Congress in Cancun, Mexico
ISAKOS

2019 ISAKOS Biennial Congress ePoster #920

 

Primary Total Knee Arthroplasty in Knees with Old Neglected Dislocation of Patella

Min-Ku Song, MD, Seoul KOREA, REPUBLIC OF
Woo-Cheol Shin, MD, Seoul KOREA, REPUBLIC OF
Joon-Hee Lee, MD, Seoul KOREA, REPUBLIC OF
Tae-Hoon Kang, MD, Seoul KOREA, REPUBLIC OF
Seung-Bin Im, MD, Seoul KOREA, REPUBLIC OF
Du-Hyun Ro, MD, MS, Seoul KOREA, REPUBLIC OF
Hyuk-Soo Han, MD, PhD, Seoul KOREA, REPUBLIC OF
Myung Chul Lee, MD, PhD, Prof., Seoul KOREA, REPUBLIC OF

Department of Orthopaedic Surgery, Seoul National University Hospital, Seoul, KOREA, REPUBLIC OF

FDA Status Cleared

Summary

TKA has the ability to correct the pathologies in OA knees with old neglected dislocation of patella with excellent outcomes.

Abstract

Introduction

Old neglected dislocation of patella is very rare and this condition can cause secondary osteoarthritis (OA). Management and outcomes of these patients are still unclear. However, total knee arthroplasty (TKA) can be a useful treatment for patients with these conditions to regain a biomechanically valid extensor mechanism.

Materials And Methods

From April 2014 to November 2017, 10 knees of 7 patients with OA with old neglected patellar dislocation were enrolled. All patients were treated with TKA. Extensive lateral release was done in all knees to maintain central patellar tracking and quadriceps lengthening only with shortened quadriceps tendon. All patients were assessed clinically and radiologically before surgery, at four weeks after surgery, at three and 12 months after surgery and then yearly thereafter.

Results

The full correction of the the limb mechanical axis was achieved in all knees. Comparing the preoperative and postoperative results, all clinical scores were statistically improved (p<0.05). There was no complication during follow up period (average 27 months, range 12 to 53 months)

Conclusion

TKA has the ability to correct the pathologies in OA knees with old neglected dislocation of patella with excellent outcomes.