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Posterior-stabilized total knee arthroplasty: a matched pair analysis of a classic and its evolutional design

BACKGROUND: Total knee arthroplasty (TKA) designs continue to be modified to optimize patient's outcome. This study was designed to compare clinical and radiological results of classic worldwide used TKA posterior-stabilized (PS) design to those of its recent evolution. METHODS: A consecutive g...

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Autores principales: Indelli, Pier Francesco, Pipino, Gennaro, Johnson, Paul, Graceffa, Angelo, Marcucci, Massimiliano
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5247512/
https://www.ncbi.nlm.nih.gov/pubmed/28326427
http://dx.doi.org/10.1016/j.artd.2016.05.002
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author Indelli, Pier Francesco
Pipino, Gennaro
Johnson, Paul
Graceffa, Angelo
Marcucci, Massimiliano
author_facet Indelli, Pier Francesco
Pipino, Gennaro
Johnson, Paul
Graceffa, Angelo
Marcucci, Massimiliano
author_sort Indelli, Pier Francesco
collection PubMed
description BACKGROUND: Total knee arthroplasty (TKA) designs continue to be modified to optimize patient's outcome. This study was designed to compare clinical and radiological results of classic worldwide used TKA posterior-stabilized (PS) design to those of its recent evolution. METHODS: A consecutive group of 100 patients undergoing TKA using a classic cemented fixed-bearing PS TKA system was matched by age, gender, body max index to 100 patients having the newer cemented fixed-bearing PS design, both by the same manufacturer. Patients were assessed preoperatively, at 12 months and at 24 months minimum follow-up (range, 24-46) in a standard prospective fashion. The outcome assessments used were the Oxford Knee Score, the Knee Society Score, range of motion, and a satisfaction survey. A 2-sample t test comparing the 2 groups was performed. RESULTS: No patients were lost at follow-up. At 2-year follow-up, differences in clinical and radiological Knee Society Score (P = .09), Oxford Score (P = .08), and overall satisfaction rate did not reach statistical significance. Implant group 2 showed a statistically significant decrease in postoperative anterior knee pain (P = .006). At final follow-up, 16% of group 1 knees achieved > 130° flexion compared with 37% in group 2 (P = .0009). There were 2 revisions for any reason in group 1 and none in group 2. CONCLUSIONS: Design modifications applied to the newer TKA system allowed greater flexion and lower patellofemoral complications but did not appear to achieve better overall clinical scores.
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spelling pubmed-52475122017-03-21 Posterior-stabilized total knee arthroplasty: a matched pair analysis of a classic and its evolutional design Indelli, Pier Francesco Pipino, Gennaro Johnson, Paul Graceffa, Angelo Marcucci, Massimiliano Arthroplasty Today Original Research BACKGROUND: Total knee arthroplasty (TKA) designs continue to be modified to optimize patient's outcome. This study was designed to compare clinical and radiological results of classic worldwide used TKA posterior-stabilized (PS) design to those of its recent evolution. METHODS: A consecutive group of 100 patients undergoing TKA using a classic cemented fixed-bearing PS TKA system was matched by age, gender, body max index to 100 patients having the newer cemented fixed-bearing PS design, both by the same manufacturer. Patients were assessed preoperatively, at 12 months and at 24 months minimum follow-up (range, 24-46) in a standard prospective fashion. The outcome assessments used were the Oxford Knee Score, the Knee Society Score, range of motion, and a satisfaction survey. A 2-sample t test comparing the 2 groups was performed. RESULTS: No patients were lost at follow-up. At 2-year follow-up, differences in clinical and radiological Knee Society Score (P = .09), Oxford Score (P = .08), and overall satisfaction rate did not reach statistical significance. Implant group 2 showed a statistically significant decrease in postoperative anterior knee pain (P = .006). At final follow-up, 16% of group 1 knees achieved > 130° flexion compared with 37% in group 2 (P = .0009). There were 2 revisions for any reason in group 1 and none in group 2. CONCLUSIONS: Design modifications applied to the newer TKA system allowed greater flexion and lower patellofemoral complications but did not appear to achieve better overall clinical scores. Elsevier 2016-08-21 /pmc/articles/PMC5247512/ /pubmed/28326427 http://dx.doi.org/10.1016/j.artd.2016.05.002 Text en http://creativecommons.org/licenses/by-nc-nd/4.0/ This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Original Research
Indelli, Pier Francesco
Pipino, Gennaro
Johnson, Paul
Graceffa, Angelo
Marcucci, Massimiliano
Posterior-stabilized total knee arthroplasty: a matched pair analysis of a classic and its evolutional design
title Posterior-stabilized total knee arthroplasty: a matched pair analysis of a classic and its evolutional design
title_full Posterior-stabilized total knee arthroplasty: a matched pair analysis of a classic and its evolutional design
title_fullStr Posterior-stabilized total knee arthroplasty: a matched pair analysis of a classic and its evolutional design
title_full_unstemmed Posterior-stabilized total knee arthroplasty: a matched pair analysis of a classic and its evolutional design
title_short Posterior-stabilized total knee arthroplasty: a matched pair analysis of a classic and its evolutional design
title_sort posterior-stabilized total knee arthroplasty: a matched pair analysis of a classic and its evolutional design
topic Original Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5247512/
https://www.ncbi.nlm.nih.gov/pubmed/28326427
http://dx.doi.org/10.1016/j.artd.2016.05.002
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