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Related Experiment Videos

Ambulatory dynamic patellar traction for patellar reconstruction

W F Blair, W R Pontarelli

    Clinical Orthopaedics and Related Research
    |September 1, 1982
    PubMed
    Summary

    Ambulatory dynamic patellar traction utilizes a cast brace to prevent patellar migration after severe soft tissue injury. This method aids in correcting proximal patellar displacement before surgical repair.

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    Area of Science:

    • Orthopedic surgery
    • Biomedical engineering

    Background:

    • Severe soft tissue injury around the knee can prevent immediate patellar tendon repair.
    • This delay can lead to proximal patellar migration and quadriceps contracture.

    Observation:

    • A cast brace assembly was developed for ambulatory dynamic patellar traction.
    • This device includes a Steinmann pin through the patella, wire loops, rubber band traction, and drop lock knee hinges.

    Findings:

    • The dynamic traction method effectively prevents or corrects early proximal migration of the patella.
    • Drop lock hinges allow for controlled knee motion during ambulation and passive range of motion.
    • Case study demonstrated successful correction of proximal patellar migration in a patient with severe knee soft tissue loss.

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    Implications:

    • This technique offers a non-operative solution for managing patellar instability post-injury.
    • It provides a method to prepare the patella for subsequent surgical reconstruction.
    • Facilitates early patient mobility while addressing patellar tendon injury complications.