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European Journal of Orthopaedic Surgery & Traumatology

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01-10-2018 | Original Article • KNEE - ARTHROPLASTY

Knee strength, power and stair performance of the elderly 5 years after unicompartmental knee arthroplasty

Authors: Yumeng Li, Rumit S. Kakar, Yang-Chieh Fu, Ormonde M. Mahoney, Tracy L. Kinsey, Kathy J. Simpson

Published in: European Journal of Orthopaedic Surgery & Traumatology | Issue 7/2018

Abstract

Background

Unicompartmental knee arthroplasty (UKA) has been shown to demonstrate some satisfactory short-term outcomes. However, to our knowledge, there have been no reports on midterm or long-term knee extensor strength and leg extensor power post-UKA.

Aims

Therefore, the purposes of this study were: (1) to assess the isokinetic knee extensor strength, leg extensor power and stair performance of elderly participants at 5 years UKA post-operation; (2) to compare the differences in knee extensor strength and leg extensor power between the UKA and contralateral healthy limbs.

Methods

Nineteen elderly participants (75 ± 5 years) who had a medial or a lateral compartment UKA at 5 years post-operation were recruited. The isokinetic knee extensor strength and leg extensor power were measured. The stair performance was tested on a 4-step stair, and ascent and descent velocities were calculated. The pain level was assessed.

Results

The UKA limbs’ knee extensor strength and leg extensor power were 1.01 ± 0.39 Nm/kg and 0.98 ± 0.27 W/kg, respectively. The stair ascent and descent velocities were 0.37 ± 0.07 and 0.38 ± 0.11 m/s, respectively. In addition, the UKA limbs exhibited comparable knee strength and leg power relative to the contralateral limbs.

Discussion

In general, the knee extensor strength and leg extensor power exhibited by the UKA limbs at 5 years post-operation may be typical in comparison with the normative data.

Conclusions

We suggest that UKA is a satisfactory treatment in regard to the recovery of knee strength, leg power and ability to climb up and down stairs.

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Title: Knee strength, power and stair performance of the elderly 5 years after unicompartmental knee arthroplasty
Authors: Yumeng Li
Rumit S. Kakar
Yang-Chieh Fu
Ormonde M. Mahoney
Tracy L. Kinsey
Kathy J. Simpson
Publication date: 01-10-2018
Publisher: Springer Paris
Published in: European Journal of Orthopaedic Surgery & Traumatology / Issue 7/2018
Print ISSN: 1633-8065
Electronic ISSN: 1432-1068
DOI: https://doi.org/10.1007/s00590-018-2198-7

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Knee strength, power and stair performance of the elderly 5 years after unicompartmental knee arthroplasty

Abstract

Background

Aims

Methods

Results

Discussion

Conclusions

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Background

Aims

Methods

Results

Discussion

Conclusions

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