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Related Experiment Videos

Uncemented press-fit total knee arthroplasty.

S Rackemann1, C M Mintzer, P S Walker

  • 1Department of Orthopedic Surgery, Brigham and Women's Hospital, Boston, Massachusetts 02115.

The Journal of Arthroplasty
|December 1, 1990
PubMed
Summary

A new uncemented total knee arthroplasty prosthesis offers pain relief and functional improvement, comparable to cemented methods. This press-fit design preserves bone stock and is suitable for complex cases, showing promising radiographic results.

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Area of Science:

  • Orthopedic Surgery
  • Biomaterials Engineering

Background:

  • Total knee arthroplasty (TKA) is a common procedure for end-stage knee arthritis.
  • Cemented fixation has been the standard, but uncemented alternatives are gaining traction.
  • Specific patient populations may benefit from bone-preserving fixation techniques.

Purpose of the Study:

  • To evaluate the clinical and radiographic outcomes of a novel uncemented, press-fit total knee arthroplasty prosthesis.
  • To assess the suitability of this prosthesis for patients with challenging bone stock deficiencies or specific medical conditions.

Main Methods:

  • Nineteen total knee arthroplasties were performed in 16 patients using a new uncemented, press-fit prosthesis.
  • Clinical outcomes including pain relief, ambulation, and range of motion were assessed.

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  • Radiographic evaluation was conducted to assess bone integration and implant stability.

    • Main Results:

    • Seventeen of 18 available knees were pain-free at an average follow-up of 3 years, 7 months.
    • Functional outcomes, including range of motion and ambulation, were comparable to cemented TKA.
    • Radiographs demonstrated bone density increase and sclerotic lines at stem ends, suggesting bone remodeling. No prosthesis migration or loosening was observed.

    Conclusions:

    • The novel uncemented, press-fit TKA prosthesis demonstrates favorable clinical and radiographic outcomes.
    • This design offers advantages in bone preservation and ease of revision, making it a viable option for select patient groups.
    • The observed bone remodeling supports the prosthesis's biological integration and long-term stability.