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Related Concept Videos

Knee Joint01:23

Knee Joint

3.8K
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.
A total of seven ligaments support the knee joint. The patellar ligament, which is also attached to the quadriceps femoris...
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Individualized Stem-positioning in Calcar-guided Short-stem Total Hip Arthroplasty
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Standard versus high-flexion posterior stabilized total knee prostheses.

Ning Li, Junwei Li, Peng Li

    Orthopedics
    |March 12, 2015
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    Summary

    High-flexion posterior-stabilized total knee prostheses show no superiority over standard types. This meta-analysis found no significant differences in range of motion, knee scores, or complications for total knee replacement patients.

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    Area of Science:

    • Orthopedic surgery
    • Biomedical engineering
    • Clinical research

    Background:

    • Total knee replacement (TKR) is a common procedure for end-stage knee arthritis.
    • Advancements in prosthesis design aim to improve patient outcomes and function.
    • High-flexion posterior-stabilized prostheses have been developed to potentially enhance range of motion (ROM) and patient satisfaction.

    Purpose of the Study:

    • To compare clinical outcomes between standard and high-flexion posterior-stabilized total knee prostheses.
    • To determine if high-flexion prostheses offer superior results in total knee replacement.
    • To evaluate differences in range of motion, functional scores, and complication rates.

    Main Methods:

    • A meta-analysis of randomized controlled trials (RCTs) published up to October 2013.
    • Inclusion of eight RCTs with a total of 660 patients.
    • Assessment of methodologic quality using the Physiotherapy Evidence Database (PEDro) scale and statistical analysis with fixed or random effects models.

    Main Results:

    • No statistically significant differences were observed between standard and high-flexion prostheses regarding postoperative ROM, flexion angle, Knee Society Score, Hospital for Special Surgery knee score, or Knee Society function score.
    • Complication rates were similar between the two prosthesis types (21 cases in the standard group vs. 14 in the high-flexion group).
    • The findings were consistent across the evaluated clinical outcome measures with follow-up of 5 years or less.

    Conclusions:

    • High-flexion posterior-stabilized total knee prostheses are not demonstrably superior to standard prostheses.
    • Current evidence does not support the use of high-flexion designs over standard designs for improved clinical outcomes in total knee replacement.
    • Further research with longer follow-up periods may be warranted to fully elucidate long-term differences, if any.