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Related Experiment Videos

Does modularity affect clinical success? A comparison with a minimum 10-year followup.

M F Brassard1, J N Insall, G R Scuderi

  • 1Insall Scott Kelly Institute for Orthopaedics and Sports Medicine, New York, NY 10128, USA.

Clinical Orthopaedics and Related Research
|July 14, 2001
PubMed
Summary

Both Insall-Burstein I and II posterior stabilized knee prostheses show comparable clinical outcomes after 10 years. Radiographic findings did not indicate significant differences in loosening or wear between the two designs.

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Area of Science:

  • Orthopedic surgery
  • Biomedical engineering
  • Knee replacement research

Background:

  • Metal-backed monoblock Insall-Burstein I and modular Insall-Burstein II Posterior Stabilized Knee Prostheses are commonly used.
  • Long-term clinical and radiographic outcomes are crucial for evaluating prosthetic performance.

Purpose of the Study:

  • To compare the clinical and radiographic results of Insall-Burstein I and Insall-Burstein II posterior stabilized knee prostheses.
  • To assess the long-term efficacy and safety of these two knee implant designs.

Main Methods:

  • A comparative study of patients undergoing knee replacement with Insall-Burstein I or Insall-Burstein II prostheses.
  • Minimum follow-up period of 10 years.
  • Evaluation of clinical outcomes using Hospital for Special Surgery (HSS) knee scores and Knee Society Scores (KSS).

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  • Radiographic assessment for radiolucent lines, loosening, polyethylene wear, and osteolysis.

    • Main Results:

    • Comparable clinical results between Insall-Burstein I and II prostheses, with similar average HSS scores (85 vs. 84).
    • No statistically significant difference in Knee Society Knee and Functional Scores.
    • Higher incidence of minor radiolucent lines in Insall-Burstein II (29%) compared to Insall-Burstein I (11%), with no clinical significance.
    • No clinical or radiographic evidence of tibial component loosening for either design.
    • Zero revisions for polyethylene wear or osteolysis in both patient cohorts.

    Conclusions:

    • Both Insall-Burstein I and II posterior stabilized knee prostheses demonstrate comparable long-term clinical efficacy and survivorship.
    • Radiographic findings, including minor radiolucencies, do not appear to impact clinical outcomes negatively.
    • These prosthetic designs show excellent durability with no significant issues related to loosening, wear, or osteolysis at the 10-year minimum follow-up.