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Related Experiment Videos

Primary cementless hip arthroplasty with a titanium plasma sprayed prosthesis

W J Hozack1, R H Rothman, K Eng

  • 1Department of Orthopaedic Surgery, Jefferson Medical College, Philadelphia, PA, USA.

Clinical Orthopaedics and Related Research
|December 1, 1996
PubMed
Summary

This study found that uncemented total hip arthroplasties showed a high rate of acetabular osteolysis (25.5%) but excellent femoral component performance. Component design is critical for hip implant longevity.

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Area of Science:

  • Orthopedic Surgery
  • Biomaterials Science
  • Medical Device Engineering

Background:

  • Total hip arthroplasty (THA) is a common procedure for hip osteoarthritis.
  • Uncemented implants aim for biologic fixation, but long-term performance varies.
  • Titanium alloy with plasma spray coating is a widely used material in THA.

Purpose of the Study:

  • To evaluate the long-term outcomes of primary uncemented total hip arthroplasties.
  • To assess the revision rates and incidence of osteolysis for both acetabular and femoral components.
  • To investigate the influence of component design on implant performance.

Main Methods:

  • A retrospective review of 105 primary uncemented THAs in 102 patients.
  • Minimum follow-up of 5 years (mean 6.1 years).

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  • Radiographic assessment for component loosening, subsidence, and osteolysis.

    • Main Results:

    • Acetabular revision rate was 11.4% due to wear and osteolysis.
    • Acetabular cavitary lytic lesions observed in 25.5% of patients at 5 years.
    • Femoral components showed excellent performance with 0% aseptic loosening and no subsidence; distal femoral lysis was absent.

    Conclusions:

    • Component design significantly impacts the performance of acetabular and femoral components in uncemented THA.
    • While femoral components demonstrated durability, acetabular components exhibited concerning rates of osteolysis.
    • Further investigation into acetabular component design is warranted to improve long-term outcomes.