Quadriceps-Efficiency-Following-Total-Knee-Arthroplasty-with-a-Medial-Pivot-System-is-Similar-to-Control

See discussions, stats, and author profiles for this publication at: https://www.researchgate.net/publication/282574167Quadriceps Efficiency Following Total Knee Arthroplasty with a Media

See discussions, stats, and author profiles for this publication at: https://www.researchgate.net/publication/282574167

Quadriceps Efficiency Following Total Knee Arthroplasty with a Medial-Pivot System is Similar to Control

Conference Paper · October 2015

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6 authors, including:

John D Blaha

University of Michigan

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Charles Lowry Barnes

University of Arkansas for Medical Sciences

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David Kent DeBoer1, J David Blaha2, C Lowry

Quadriceps Efficiency Following Total Knee Arthroplasty with a Medial-Pivot

System is Similar to Control

Does a medial pivot TKA design affect quadriceps

efficiency following TKA compared to a non-implanted

control?

deep flexion and back to full extension

implants by board certified orthopaedic surgeon

• Loading activity repeated

1 Pritchett, J et al JBJS Br 2004, 86(7): p.979-982 2 Lam, MH et al BMC Sports Science Medicine & Rehabilitation 2009, 1:20 3 Blaha, JD JOA 2012; 27(8):1460-1468 4 Schmidt, R et al CORR 2003 May; (410), 139-147 5 Komistek, RD et al CORR 2003 May; (410), 66-81 6 LaMontaigne, M et al 2014

Flexion to Extension Quadriceps Load Factor

-2

0

2

4

6

8

10

12

Degrees of Flexion

Control (Pre-Implantation) Medial-Pivot TKA (Post-Implantation)

No significant difference throughout ROM

As a whole, quadriceps least

efficient during peak flexion (80-115° when FQ highest

EVOLUTION® Medial Pivot CS had slightly higher quad efficiency

than control during peak flexion

normal knee kinematics

medial tibial insert socket

• Provides constant moment arm on which extensor mechanism can act

Role in rehabilitation Return to daily living activities

Anterior knee pain Patient fatigue

Quadriceps Efficiency