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Design comparison: manipulation after total knee arthroplasty.

Jason M Rogers1, Kevin V Patel, C Lowry Barnes

  • 1University of Arkansas for Medical Sciences, Little Rock, Arkansas.

Journal of Surgical Orthopaedic Advances
|April 2, 2015
PubMed
Summary
This summary is machine-generated.

The Evolution medial pivot knee required fewer manipulations under anesthesia (MUA) compared to the Advance design. This suggests design improvements in the Evolution knee may reduce postoperative stiffness after total knee arthroplasty (TKA).

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Area of Science:

  • Orthopedic surgery
  • Biomedical engineering

Background:

  • Postoperative stiffness is a potential complication of total knee arthroplasty (TKA).
  • Manipulation under anesthesia (MUA) is a common treatment for TKA stiffness after failed physical therapy.
  • The Advance and Evolution medial pivot knee systems were developed to improve outcomes.

Purpose of the Study:

  • To compare the rates of MUA between the Advance and Evolution medial pivot knee systems.
  • To evaluate if design modifications in the Evolution knee reduce the incidence of postoperative stiffness requiring MUA.

Main Methods:

  • Retrospective review of prospectively collected data.
  • Analysis of 881 primary medial pivot TKAs (592 Advance, 289 Evolution).
  • Comparison of MUA rates between the two knee designs.

Main Results:

  • The Evolution knees demonstrated a statistically significant lower rate of MUA compared to the Advance knees (p = .036).
  • This indicates a potential reduction in the need for manipulation under anesthesia with the Evolution design.

Conclusions:

  • Design modifications in the Evolution medial pivot knee may contribute to a lower incidence of postoperative stiffness.
  • The Evolution knee system shows promise in reducing the need for MUA following TKA.