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A modular femur-tibia reconstruction system.

R Kotz, P Ritschl, J Trachtenbrodt

    Orthopedics
    |December 1, 1986
    PubMed
    Summary
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    This study evaluated the Kotz Modular Femur-Tibia Reconstruction System (KMFTR), a cementless modular prosthesis for lower extremity reconstruction. The system demonstrated satisfactory outcomes and good patient satisfaction despite some complications.

    Area of Science:

    • Orthopedic Surgery
    • Biomaterials Engineering
    • Oncology

    Background:

    • The Kotz Modular Femur-Tibia Reconstruction System (KMFTR) is a 26-piece modular prosthesis designed for lower extremity reconstruction.
    • This cementless system, utilizing Vitallium (Co-Cr-Mo alloy), allows intraoperative determination of resection levels.
    • It addresses reconstructions from the femoral head to the distal tibia.

    Purpose of the Study:

    • To evaluate the clinical and radiological outcomes of the KMFTR in patients undergoing limb reconstruction.
    • To assess the efficacy of this cementless modular endoprosthesis for bone tumor resections and revisions.

    Main Methods:

    • A retrospective analysis of 52 patients treated between 1982 and 1985 at the University of Vienna.
    • Tumor locations included proximal femur (28), distal femur (17), and proximal tibia (7).

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  • Twenty-one patients were evaluated using Enneking's criteria with an average follow-up of 20.4 months.

    • Main Results:

    • Excellent bone incorporation was observed radiologically in 15 of 25 evaluated patients.
    • Functional outcomes for proximal femoral replacement (8 patients) were 2 excellent, 5 good, and 1 fair.
    • Knee joint area replacements (11 patients) yielded 5 excellent, 4 good, and 2 fair results.

    Conclusions:

    • The KMFTR cementless modular endoprosthesis provides satisfactory outcomes and good subjective patient satisfaction for lower extremity reconstruction.
    • Despite surgical complexities and some complications, the system shows effective bone incorporation and functional restoration.
    • This modular system offers a viable option for complex bone tumor resections and revisions in the femur and tibia.