Open Access
CC BY-NC-ND 4.0 · Revista Chilena de Ortopedia y Traumatología 2024; 65(02): e78-e84
DOI: 10.1055/s-0044-1789017
Artículo Original | Original Article

Total Knee Arthroplasty in Coronal Deformities > 15°: Comparison of Short-term Outcomes between Primary and Semi-constrained Implants

Artikel in mehreren Sprachen: español | English
Alex Vaisman
1   Facultad de Medicina, Clínica Alemana, Universidad del Desarrollo, Santiago, Chile
,
2   Hospital Padre Hurtado, Santiago, Chile
3   Clínica Las Condes, Santiago, Chile
,
Rodrigo Guiloff
1   Facultad de Medicina, Clínica Alemana, Universidad del Desarrollo, Santiago, Chile
4   Hospital Sótero Del Río, Santiago, Chile
,
Carlos Valderrama
2   Hospital Padre Hurtado, Santiago, Chile
,
Sergio Arellano
1   Facultad de Medicina, Clínica Alemana, Universidad del Desarrollo, Santiago, Chile
2   Hospital Padre Hurtado, Santiago, Chile
,
Diego Edwards
1   Facultad de Medicina, Clínica Alemana, Universidad del Desarrollo, Santiago, Chile
5   Hospital de La Florida, Santiago, Chile
› Institutsangaben
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Abstract

Objective To compare the clinical and radiological patient outcomes with varus-valgus knee deformities undergoing knee replacement with posterior stabilized (PS) prostheses versus semi-constrained condylar knee (CCK) implants.

Methods Retrospective study of patients with mechanical alignment (MA) > 15°, undergoing PS or CCK. All the procedures were done in the same center between 2014-2018. The decision was determined by clinical, radiological, and intraoperative parameters. Patients with incomplete data and follow-ups of less than one year were excluded. Patient demographic data, pre- and postoperative deformity, range of motion (ROM), complications, and functional outcomes were evaluated from the database.

Results 39 patients met the selection criteria. PS group: 27 patients, mean age of 69 years [49-82]; 59.3% varus and 40.7% valgus. CCK group: 12 patients, mean age of 69.3 years [41-89]; 33.3% varus and 66.7% valgus. The groups had no significant differences regarding demographic data or MA between the groups (p = 0.07). Average follow-up: PS = 49,1 months; CCK = 22 months. The KOOS score was 74.1 for PS and 85.2 for CCK (p > 0,05). WOMAC score was significantly better for the CCK group. The average postoperative ROM was PS = active: 1,9°-101°; passive: 1,6°-108,4° /CCK = active: 2,5-110°, passive: 1,9-117°. Significant differences in active (p = 0.03) and passive (p = 0.04) flexion were observed. The MA correction was PS = 14,9 [3°-31°] / CCK = 19° [13°-28°] (p = 0.09). No infectious or thromboembolic postoperative complications were reported.

Conclusion PS and CCK implants are valid options for patients with coronal deformities >15°. At almost two years of follow-up, the WOMAC Score and flexion significantly improved outcomes with the CCK implant.

Level of evidence IV.



Publikationsverlauf

Eingereicht: 05. Oktober 2022

Angenommen: 01. Juli 2024

Artikel online veröffentlicht:
25. September 2024

© 2024. Sociedad Chilena de Ortopedia y Traumatologia. This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/)

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