Sobrevida y complicaciones del uso de prótesis abisagrada en artroplastia de revisión y primaria compleja de rodilla

Abstract

Introduction: The purpose of this study was to retrospectively evaluate a series of patients who underwent surgery for a total knee arthroplasty with a hinged prosthesis and determinate clinical and radiological outcomes, analyzing the causes of failure and complications in the short and medium term.

Material and methods: A total of 24 hinged knee prostheses were evaluated in non-oncological reconstructions. Thirteen were women and eleven men, with an average age of 72 years (53 to 87 years). The average follow-up was 40 months (range from 20 to 70 months). In eleven cases the patients underwent a complex primary arthroplasty and in 13 cases a prosthetic revision surgery. Radiographic control and clinical and functional evaluation are performed preoperatively and in the last control using the Knee Society Score (KSS).

Results: Seven patients (29%) have a major complications in the first year of follow-up, three patients with an extensor mechanism dislocation and two patients with a prosthetic dislocation because a rupture of the hinged component. The average clinical evaluation KSS score was 36 in the preoperative (range 22 to 54 points) and 78 average points in the last control (range 56-95 points), which an improvement of 42 points. Implant survival was 92% at 40 months. There are no differences between patients with primary arthroplasties with those with revision arthroplasties.

Conclusion: The use of hinged implants in complex primary or revision knee arthroplasties is a recommended option in selected patients, with good functional and radiological results in the medium term.