Comparative study with high-flex total knee arthroplasty. functional and range of motion results

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Published: Aug 27, 2014
DOI: https://doi.org/10.15417/197
Keywords:
Knee prosthesis. Arthroplasty. Flexion. High-flex design.

Main Article Content

Matías Costa Paz
Hospital Italiano de Buenos Aires

Abstract

AbstractBackground: The purpose of this comparative study is to analyze functional results and the range of motion of the knee between two groups of patients with total knee arthroplasty using high-flex prosthesis (in one group) and with a conventional implant (in the other).Methods: Sixty-four patients were surgically treated with total knee arthroplasty with Zimmer NexGen®, USA. From this series, 22 patients (group A) were treated with high-flex design. Two cases with rheumatoid arthritis were excluded. Forty-two patients were treated with a conventional implant, 21 of them were excluded, and group B included 21 patients. Maximum flexion and extension were evaluated before and after surgery. Functional evaluation was performed with the Knee Society Score (KSS), the Western Ontario and McMaster Universities osteoarthritis index (WOMAC), and an analogous visual scale.Results: The mean pre-surgical maximum flexion was 99° in group A and 106º in group B. Mean post-surgical maximum flexion in group A increased to 114º with an average increase of 15º and, in group B, to 118º with an average gain of 12º. There were no significant statistical differences (p <0.05). Pre-surgical KSS in group A was 36/48 and increased to 90/92. In group B, pre-surgical KSS was 46/49 and 94/90 after surgery.Conclusion: This study suggests that there are no significant differences in the range of motion, functional results, and radiographic evaluation in a high-flex total knee arthroplasty and a conventional design after one year of follow-up. 

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How to Cite
Costa Paz, M. (2014). Comparative study with high-flex total knee arthroplasty. functional and range of motion results. Revista De La Asociación Argentina De Ortopedia Y Traumatología, 79(3), 142-148. https://doi.org/10.15417/197
Issue
Vol 79 No 3 (2014)
Section
Clinical Research
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Author Biography

Matías Costa Paz, Hospital Italiano de Buenos Aires

Jefe Int. del Sector de Artroscopia y Protesis de Rodilla

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