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Related Experiment Videos

Cemented long-stem revision total knee arthroplasty

P B Murray1, J A Rand, A D Hanssen

  • 1Department of Orthopedics, Mayo Clinic/Mayo Foundation, Rochester, MN 55905.

Clinical Orthopaedics and Related Research
|December 1, 1994
PubMed
Summary
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Cemented long-stemmed revision total knee arthroplasty demonstrated improved pain and function scores. Radiographic findings showed stable or minimal radiolucencies, suggesting good prosthesis fixation in this patient cohort.

Area of Science:

  • Orthopedic Surgery
  • Biomaterials Engineering

Background:

  • Cemented long-stemmed revision total knee arthroplasty (TKA) raises theoretical concerns regarding stress shielding and prosthesis fixation.
  • Understanding the clinical outcomes and radiographic findings is crucial for optimizing revision TKA procedures.

Purpose of the Study:

  • To evaluate the clinical outcomes and radiographic findings of cemented long-stemmed kinematic stabilizer revision TKA.
  • To assess the incidence and progression of radiolucencies around tibial and femoral components.

Main Methods:

  • Retrospective review of 40 cemented long-stemmed kinematic stabilizer revision TKAs in 35 patients.
  • Clinical outcomes assessed using Knee Society pain and function scores.
  • Radiographic evaluation for radiolucencies around tibial and femoral components at initial postoperative and final follow-up.

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Main Results:

  • Significant improvement in Knee Society pain scores (38 to 83) and function scores (46 to 64).
  • Tibial radiolucencies observed in 32% of cases, with no progression noted in initially present ones. New radiolucencies were incomplete and < 1 mm.
  • Femoral component radiolucencies were minimal and mostly stable or asymptomatic.

Conclusions:

  • Cemented long-stemmed revision TKA provides favorable clinical outcomes with acceptable radiographic findings.
  • The incidence of tibial radiolucencies is comparable to non-stemmed designs, with minimal progression observed.
  • Long-term prosthesis fixation appears satisfactory, despite theoretical concerns of stress shielding.