Abstract

GARABANO, Germán; LOPREITE, Fernando  and  DEL SEL, Hernán. Reemplazo total de rodilla en pacientes menores de 55 años con gonartrosis: Seguimiento de 2 a 13 años. Rev. Asoc. Argent. Ortop. Traumatol. [online]. 2017, vol.82, n.2, pp.94-101. ISSN 1852-7434.

Introduction: Total knee arthroplasty is being performed with increasing frequency in young patients. Published data on the clinical scores and long-term durability for total knee arthroplasty in these patients are limited and most include patients with rheumatoid arthritis. The purpose of this study was to analyze a group of total knee arthroplasties in patients <55 years old, excluding those with rheumatoid arthritis, in order to assess prosthetic survival, radiographic failures and functional outcomes. Methods: A total of 53 total knee arthroplasties were retrospectively analyzed in 46 patients (average age: 49 years [range 26-54]) and a mean follow-up of 6.5 years (range 2-15). The preoperative diagnoses accounted for 46 idiopathic knee osteoathritis, 5 post-traumatic arthritis and 2 osteonecrosis. Twenty-two patients had previous surgeries. The clinical and functional outcomes were assessed using the Knee Society Score and the WOMAC, whereas radiological assessment system of the Knee Society was used. Results: Clinical and functional KSS improved from 49.3 to 92.6 and from 46.8 to 91.4 postoperatively on average, respectively. The average WOMAC score was 2.3 for pain, 2.6 for stiffness and 27.3 for functional capacity. Radiolucent lines <1 mm were observed in 16%, without progression over time. There were 3 infections requiring two-stage revision evolving favorably and 4 cases of stiffness that were manipulated under anesthesia or arthroscopy. The prosthetic survival rate was 94.34%. Conclusions: Total knee arthroplasty in patients <55 years provides functional improvements, with an acceptable prosthetic survival considering previous surgeries. At the end of the follow-up, no radiological failures were observed.

Keywords : Total replacement; Knee; Young patients; Osteoarthritis; Post-traumatic arthritis.

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