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Osteolysis in a surface-cemented, primary, modular Freeman-Samuelson total knee replacement.

J Arora1, A C Ogden

  • 1Department of Trauma and Orthopaedics, North Tyneside General Hospital, Rake Lane, North Shields, Northumbria NE29 8NH, UK. arorajayant@yahoo.com

The Journal of Bone and Joint Surgery. British Volume
|November 2, 2005
PubMed
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This study evaluated cementless patellar components in Freeman-Samuelson total knee replacements. High rates of radiolucency and osteolysis were observed, suggesting potential issues with uncemented patellar fixation and wear.

Area of Science:

  • Orthopedic Surgery
  • Biomaterials Science
  • Radiology

Background:

  • The Freeman-Samuelson total knee replacement is a modular implant system.
  • Assessing long-term outcomes of this specific implant design is crucial for understanding its clinical performance.

Purpose of the Study:

  • To evaluate the clinical and radiological outcomes of primary, cemented, modular Freeman-Samuelson total knee replacement.
  • To identify factors contributing to implant failure and osteolysis.

Main Methods:

  • Analysis of 117 patients (125 knees) with a mean follow-up of 7.25 years.
  • Radiological assessment of 82 knees for radiolucent lines and osteolytic lesions.
  • Evaluation of functional outcome scores and cumulative survival rates.

Related Experiment Videos

Main Results:

  • 50% of knees showed radiolucent lines, and 16% exhibited osteolytic lesions.
  • Asymptomatic rotational loosening of the patellar component occurred in 4% of patients.
  • Osteolysis was more prevalent in knees with patellar resurfacing.

Conclusions:

  • The study highlights a significant rate of radiolucency and osteolysis associated with the Freeman-Samuelson total knee replacement, particularly concerning the uncemented patellar component.
  • Increased polyethylene wear, patellar loosening, and the surface-cementing technique may contribute to osteolysis.
  • Further investigation into component design and fixation methods is warranted.