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[Initial results with the AO Dynamic Hip Screw (DHS)].

A Osterwalder, C Dietschi, S Martinoli

    Zeitschrift Fur Orthopadie Und Ihre Grenzgebiete
    |March 1, 1985
    PubMed
    Summary
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    The Dynamic Hip Screw (DHS) is a safe and effective implant for proximal femur fractures, showing no implant failures and high patient mobility post-surgery. This study confirms its reliability in treating various hip fractures.

    Area of Science:

    • Orthopedic Surgery
    • Traumatology
    • Biomaterials Engineering

    Background:

    • Proximal femur fractures are common, especially in the elderly, necessitating effective surgical fixation.
    • The Dynamic Hip Screw (DHS) is a widely used implant for these fractures, but its long-term outcomes require continuous evaluation.

    Purpose of the Study:

    • To evaluate the efficacy and safety of the Dynamic Hip Screw (DHS) for various proximal femur fractures.
    • To assess functional outcomes, complication rates, and implant performance in a cohort of elderly patients.

    Main Methods:

    • A retrospective follow-up study of 54 osteosyntheses using the AO Dynamic Hip Screw (DHS).
    • Patients averaged 72 years old with diverse fractures including femoral neck, pertrochanteric, and subtrochanteric regions.

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  • Follow-up ranged from 3 to 26 months, assessing mobility, hip movement, pain, and reoperations.

    • Main Results:

    • No implant failures or intra-articular screw protrusion observed in any case.
    • High functional recovery: 97% of patients regained ambulation, 89% had good hip mobility.
    • Low complication rate: 7.4% technical faults, 1.85% infection; 6 reoperations (11%) were required.

    Conclusions:

    • The DHS is a simple, effective, and reliable fixation device for proximal femur fractures.
    • Its telescopic sliding mechanism facilitates fracture consolidation without implant complications.
    • The DHS demonstrates excellent clinical outcomes and patient mobility in this elderly cohort.