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Related Concept Videos

Knee Joint01:23

Knee Joint

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The knee joint is the most complicated joint in the body. It consists of three articulations– two tibiofemoral and one patellofemoral. As is characteristic of synovial joints, the knee joint has a thin articular capsule that partially surrounds this joint cavity. Additionally, several ligaments, muscles, and cartilaginous structures support the movement of the knee.
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The femur is the body's longest and strongest bone spanning the thigh region. Its head articulates with the acetabulum of the hip bone to form the hip joint. A minor indentation on the medial side of the femoral head, called the fovea capitis, serves as the site of attachment for the ligament of the head of the femur. This weak ligament spans the femur and acetabulum and supports the hip joint. The narrowed region below the head is the neck of the femur. The inclination angle between the...
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The ankle is formed by the talocrural joint (crural = leg). It consists of the articulations between the talus bone of the foot and the distal ends of the tibia and fibula of the leg. The superior aspect of the talus bone is square-shaped and has three areas of articulation. The top of the talus articulates with the inferior tibia. This is the portion of the ankle joint that carries the body weight between the leg and foot. The sides of the talus are firmly held in position by the articulations...
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Related Experiment Video

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In Vitro Application of a Wireless Sensor in Flexion-Extension Gap Balance of Unicompartmental Knee Arthroplasty
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In Vitro Application of a Wireless Sensor in Flexion-Extension Gap Balance of Unicompartmental Knee Arthroplasty

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[GUEPAR hinge knee prosthesis (author's transl)].

J H Aubriot, A Deburge, J P Genet

    Revue De Chirurgie Orthopedique Et Reparatrice De L'Appareil Moteur
    |January 1, 1981
    PubMed
    Summary
    This summary is machine-generated.

    The Guepar hinge knee prosthesis showed good long-term results in 60% of patients, but complications like patellar displacement and loosening necessitate careful patient selection and surgical technique. Adding a patellar prosthesis may improve outcomes.

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    Area of Science:

    • Orthopedic Surgery
    • Biomaterials Engineering
    • Clinical Outcomes Research

    Context:

    • Evaluation of early and late outcomes for the Guepar hinge knee prosthesis.
    • Analysis of 184 operations performed before January 1st, 1974.
    • Inclusion of patients with degenerative osteoarthritis and rheumatoid arthritis.

    Purpose:

    • To assess the efficacy and complications of the Guepar hinge knee prosthesis.
    • To identify factors influencing patient outcomes and reoperation rates.
    • To provide recommendations for optimizing prosthesis selection and surgical techniques.

    Summary:

    • Patellar displacement was a frequent complication (27%), causing pain and instability, necessitating reoperation in 10% of cases. Addition of a patellar prosthesis proved effective for pain relief.
    • Deep infections occurred in 8.3% of cases, with healing achieved through revision or arthrodesis, though functional results were often poor post-fusion.
    • Loosening occurred in 16% of cases, primarily due to technical issues, requiring reoperation in 6% of patients. Late functional results (5-8 years) showed 60% excellent/good outcomes, with no deterioration apart from loosening.

    Impact:

    • Suggests limiting Guepar prosthesis use to specific cases due to observed complication rates.
    • Recommends using a patellar prosthesis, reinforced models, and cementing under pressure to prevent complications.
    • Highlights the importance of surgical technique in minimizing loosening and improving long-term functional results.