Advisor Information

Brian Knarr

Location

Dr. C.C. and Mabel L. Criss Library

Presentation Type

Poster

Start Date

3-3-2017 12:30 PM

End Date

3-3-2017 1:45 PM

Abstract

In the US, more than 500,000 TKA surgeries are performed annually, to which 97% of those are led by OA1. Although knee pain is diminished post-TKA, unilateral efficiency and walking asymmetry is still unresolved several years after the surgery2. In fact, within a minimum of 10 years after the primary TKA, almost 50% of patients undergo a secondary TKA on the contralateral limb due to OA progression3. The purpose of this study was to determine if post-Total Knee Arthroplasty peak vertical ground reaction force (pVGRF) asymmetry could be identified using stance phase time differences between the surgical and the contralateral limbs. 18 adults (66±6 years, 11M, 7F) whom undergone TKA surgery (11.19±6.47 months) were selected for this study. Motion and force data were collected using 8 camera system (Motion Analysis Corp., CA) and an instrumented split-belt treadmill (Bertec Corp., OH). Results indicates interlimb asymmetry during stance time and pVGRF but no correlation was observed between the two variables (F r= -0.01; SS r= -0.23). In conclusion, stance time symmetry is not a valid measurement to assess interlimb asymmetry for post-TKA patients. Results suggest that assessing interlimb loading patterns for post-TKA population may require sophisticated tools such as force platforms.

References.

  1. Jacobs JJ. 2008. The burden of musculoskeletal diseases in the United States: prevalence, societal and economic cost. Rosemont IL: American Academy of Orthopaedic Surgeons.
  2. Alnahdi AH, Zeni Ja, Snyder­Mackler L. Gait after unilateral total knee arthroplasty: frontal plane analysis. Journal of Orthopaedic Research. 2011;29(5):647–652. [PMC free article] [PubMed]
  3. Shao Y, Zhang C, Charron KD, MacDonald SJ, McCalden RW, Bourne RB. The fate of the remaining knee(s) or hip(s) in osteoarthritic patients undergoing a primary TKA or THA. J. Arthroplasty 2013;28(10):1842-1845. doi:10.1016/j.arth.2012.10.008.

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Mar 3rd, 12:30 PM Mar 3rd, 1:45 PM

Peak Vertical Ground Reaction force & Stance Phase time to assess post-TKA interlimb asymmetry

Dr. C.C. and Mabel L. Criss Library

In the US, more than 500,000 TKA surgeries are performed annually, to which 97% of those are led by OA1. Although knee pain is diminished post-TKA, unilateral efficiency and walking asymmetry is still unresolved several years after the surgery2. In fact, within a minimum of 10 years after the primary TKA, almost 50% of patients undergo a secondary TKA on the contralateral limb due to OA progression3. The purpose of this study was to determine if post-Total Knee Arthroplasty peak vertical ground reaction force (pVGRF) asymmetry could be identified using stance phase time differences between the surgical and the contralateral limbs. 18 adults (66±6 years, 11M, 7F) whom undergone TKA surgery (11.19±6.47 months) were selected for this study. Motion and force data were collected using 8 camera system (Motion Analysis Corp., CA) and an instrumented split-belt treadmill (Bertec Corp., OH). Results indicates interlimb asymmetry during stance time and pVGRF but no correlation was observed between the two variables (F r= -0.01; SS r= -0.23). In conclusion, stance time symmetry is not a valid measurement to assess interlimb asymmetry for post-TKA patients. Results suggest that assessing interlimb loading patterns for post-TKA population may require sophisticated tools such as force platforms.

References.

  1. Jacobs JJ. 2008. The burden of musculoskeletal diseases in the United States: prevalence, societal and economic cost. Rosemont IL: American Academy of Orthopaedic Surgeons.
  2. Alnahdi AH, Zeni Ja, Snyder­Mackler L. Gait after unilateral total knee arthroplasty: frontal plane analysis. Journal of Orthopaedic Research. 2011;29(5):647–652. [PMC free article] [PubMed]
  3. Shao Y, Zhang C, Charron KD, MacDonald SJ, McCalden RW, Bourne RB. The fate of the remaining knee(s) or hip(s) in osteoarthritic patients undergoing a primary TKA or THA. J. Arthroplasty 2013;28(10):1842-1845. doi:10.1016/j.arth.2012.10.008.