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Ambulatory function in total knee arthroplasty.

H B Skinner, R L Barrack, S D Cook

    Southern Medical Journal
    |October 1, 1983
    PubMed
    Summary
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    Total knee arthroplasty shows slight gait improvements, with cadence being statistically significant. However, gait parameters do not fully normalize even long-term after surgery.

    Area of Science:

    • Orthopedic Surgery
    • Biomechanics
    • Rehabilitation Science

    Background:

    • Total knee arthroplasty (TKA) aims to restore function, but gait abnormalities often persist.
    • Understanding gait changes over time is crucial for evaluating TKA effectiveness and prosthesis design.

    Purpose of the Study:

    • To characterize post-TKA gait patterns as a function of time since surgery.
    • To quantify the long-term effectiveness of TKA and compare different prosthesis designs.

    Main Methods:

    • Gait analysis was performed on 32 preoperative and 50 postoperative patients.
    • Key gait parameters measured included velocity, cadence, stride length, and gait cycle.
    • Linear regression analysis was used to assess gait parameters over postoperative time (0.7-111 months).

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    Main Results:

    • Extrapolation to zero time showed a slight, mostly non-significant, improvement in gait parameters compared to preoperative state, except for cadence (P<0.05).
    • Velocity and stride length showed gradual improvement towards normal values with increased postoperative time.
    • Gait parameters did not fully approach normal values at any postoperative interval.

    Conclusions:

    • While TKA offers some gait improvements, long-term outcomes suggest persistent deviations from normal gait.
    • Further research is needed to optimize TKA procedures and prosthesis designs for more complete gait restoration.