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Related Experiment Videos

[The isoelastic RM hip endoprosthesis]

R A Grünther, O Oest, F Süssenbach

    Zeitschrift Fur Orthopadie Und Ihre Grenzgebiete
    |November 1, 1993
    PubMed
    Summary

    Long-term results of 211 cementless RM Total Hip Replacements show significant radiolucent lines. After 9.1 years, nearly 20% of cups and 30% of stems had lines over 2 mm.

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    Area of Science:

    • Orthopedic Surgery
    • Biomaterials Science

    Background:

    • The study evaluates the long-term performance of cementless RM Total Hip Replacements.
    • The "Isoelasticity" principle and implant design (cup and stem) are key features.

    Purpose of the Study:

    • To present long-term results of 211 cementless isoelastic RM Total Hip Replacements implanted between 1980 and 1986.
    • To compare study outcomes with the Merle d'Aubigné classification scheme.

    Main Methods:

    • A cohort of 211 patients received cementless isoelastic RM Total Hip Replacements.
    • Follow-up included a questionnaire and study adhering to SICOT, AAOS, and HIP society recommendations.
    • Radiolucent lines were assessed after an average of 9.1 years.

    Main Results:

    • Significant differences were observed when compared to the Merle d'Aubigné scheme.
    • Radiolucent lines exceeding 2 mm were found in 19.3% of cups.
    • Radiolucent lines exceeding 2 mm were found in 30.8% of stems.

    Conclusions:

    • The long-term performance of these specific cementless hip replacements requires careful consideration.
    • A substantial percentage of implants showed radiolucent lines, indicating potential long-term concerns.

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