Long term results of rotating hinge total knee arthroplasty in complex primary and revision cases

Abstract

Rotating Hinge Knee prosthesis in total knee arthroplasty has shown good long-term outcome and survival. The purpose of this study was to evaluate the long term outcome and survival of Rotating Hinge Knee prosthesis in complex primary and revision cases.

A retrospective study was performed on 111 patients (117 knees) operated using a NexGen Rotating Hinge Knee prosthesis between 2002 and 2010. Clinical assessment was done evaluating Knee Society scores and range of motion preoperatively and at latest follow-up. Radiological assessment was done using Anteroposterior and Lateral radiographs of the knee joint. 10 year survival of the prosthesis was calculated using the Kaplan-Meier method.

The mean Knee Society Knee score and Function score improved significantly from a preoperative value of 34 to 80 and from 16 to 60 respectively (p value < 0.05). The mean range of motion also improved significantly from a preoperative value of 50 degrees to 95 degrees (p value < 0.05). 10 years survival of the prosthesis was 90.65%. A complication rate of 11.7% was encountered.

Use of NexGen Rotating Hinge Knee prosthesis has been associated with highly satisfying clinical and functional outcomes in both complex primary and revision cases.