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General Orthopaedics

MANAGEMENT OF MEDIAL OSTEOARTHRITIS OF THE KNEE IN THE YOUNG PATIENT WITH HIGH BODY MASS INDEX AND HIGH PHYSICAL DEMANDS; A ROLE FOR HIGH TIBIAL OSTEOTOMY?

South West Orthopaedic Club (SWOC)



Abstract

Introduction

The management of young patients with painful medial compartment osteoarthritis remains controversial. Opening wedge medial high-tibial osteotomy using a locking plate has shown good results in selected patients. This cohort of patients has high physical demands and previous studies have warned against operating on patients with increased body mass index (BMI).

Patients and Methods

Thirty five patients undergoing valgus high tibial osteotomy between Oct 2004 and Feb 2010. Surgical outcome was assessed using Oxford Knee score, pre- and post-operative pain scores, change in employment and patient satisfaction.

Results

Mean age at the time of surgery was 41 (22 to 62), mean BMI was 30.9 (21 to 43) and mean Oxford score was 37/48 (16 to 48). Patients rated their overall satisfaction as 7.9/10. Three patients were lost to follow-up, two patients died of unrelated disease. Fifteen (50%) patients had heavy manual jobs and of these 12 (80%) returned to their previous employment post-operatively within 6 months. Seven patients had a BMI > 35 (Mean 39) with a mean weight of 126 Kg (105Kg to 144Kg). These patients had a mean Oxford Score of 42/48 and overall satisfaction of 90%. Pain improved from 8.4/10 pre-op to 1.5/10 post-op (P < 0.0001). None had further procedures.

Conclusion

Opening wedge high-tibial osteotomy offers a successful alternative treatment of medial osteoarthritis in young patients with high BMI who place high demands on their knees.