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Purpose <p> <!--Query ID="Q1" Text="Please check and confirm if the authors and their respective affiliations have been correctly identified. Amend if necessary." Resolved="yes"-->After total knee arthroplasty (TKA), patients may experience noise generated by their replaced knee. This study aimed to assess the impact of prosthesis design on noise generation.</p> Method <p>This single centre comparative retrospective study was conducted including 200 patients who underwent a TKA between 2020 and 2022 with a minimum of 2 years of follow-up. The SKV, IKS, satisfaction score and Kuriyama questionnaires were completed. Three prosthesis designs were assessed: Medial Pivot (MP) - Microport<sup>®</sup>, Mobile Bearing (MB) – Amplitude<sup>®</sup> and Cruciate Retaining (CR) – Stryker<sup>®</sup>.</p> Results <p>The MP design generated less noise than the MB or CR design. In the MP group, 74.5% of patients did not describe any noise compared to 61.4% for the MB group and 62.1% for the CR group. The rate of patients experiencing noise from their prosthesis was 32%. The majority of patients were very satisfied (68%) or satisfied (24%) with their surgery. Patients who had a silent prosthesis were more satisfied than those who had a prosthesis that generated noise, with a greater proportion of patients in the satisfied/very satisfied group (93% versus 84%); <i>p</i> = 0.02. The average SKV score was 81.8 (± 4.7) in the silent group versus 75 (± 4.6) in the noise group (NS). The functional difference (IKS function score) between the two groups was not statistically significant (36 (± 2.5); 34.6 (± 3.4) vs. <i>p</i> = 0.12).</p> Conclusion <p>The MP design generates less noise than MB and CR at two years of follow-up after a TKA.</p> Level of evidence III <p>Retrospective comparative study.</p>

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Medial Pivot prostheses generate less noise than mobile bearing and cruciate retaining total knee arthroplasties

  • 期刊论文

  • 发表日期：

    2025年5月15日

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  • Jérôme Murgier,
  • Thibaut Tourcher,
  • Etienne Cavaignac

摘要

Purpose

After total knee arthroplasty (TKA), patients may experience noise generated by their replaced knee. This study aimed to assess the impact of prosthesis design on noise generation.

Method

This single centre comparative retrospective study was conducted including 200 patients who underwent a TKA between 2020 and 2022 with a minimum of 2 years of follow-up. The SKV, IKS, satisfaction score and Kuriyama questionnaires were completed. Three prosthesis designs were assessed: Medial Pivot (MP) - Microport®, Mobile Bearing (MB) – Amplitude® and Cruciate Retaining (CR) – Stryker®.

Results

The MP design generated less noise than the MB or CR design. In the MP group, 74.5% of patients did not describe any noise compared to 61.4% for the MB group and 62.1% for the CR group. The rate of patients experiencing noise from their prosthesis was 32%. The majority of patients were very satisfied (68%) or satisfied (24%) with their surgery. Patients who had a silent prosthesis were more satisfied than those who had a prosthesis that generated noise, with a greater proportion of patients in the satisfied/very satisfied group (93% versus 84%); p = 0.02. The average SKV score was 81.8 (± 4.7) in the silent group versus 75 (± 4.6) in the noise group (NS). The functional difference (IKS function score) between the two groups was not statistically significant (36 (± 2.5); 34.6 (± 3.4) vs. p = 0.12).

Conclusion

The MP design generates less noise than MB and CR at two years of follow-up after a TKA.

Level of evidence III

Retrospective comparative study.