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A new method of measuring patellar height

J S Blackburne, T E Peel

    The Journal of Bone and Joint Surgery. British Volume
    |May 1, 1977
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a method to measure patellar height using knee radiography. Results show patellar height variations in males with chondromalacia compared to females.

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    Area of Science:

    • Orthopedic surgery
    • Radiology
    • Biomechanical analysis

    Background:

    • Patellar height is a crucial indicator of knee joint health.
    • Abnormal patellar positioning can lead to pain and dysfunction.
    • Accurate measurement techniques are essential for diagnosis and treatment planning.

    Purpose of the Study:

    • To establish a reliable method for measuring patellar height using lateral knee radiography.
    • To define normal ranges for patellar height.
    • To investigate patellar height in conditions like subluxation and chondromalacia.

    Main Methods:

    • Lateral radiography of the knee with flexion exceeding 30 degrees.
    • Measurement of the ratio between the articular length of the patella and the height of the lower pole of articular cartilage above the tibial plateau.

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  • Comparison of measurements against established normal values.

    • Main Results:

    • Normal patellar height values range from 0.54 to 1.06.
    • Subluxating patellae were observed at the upper limit of the normal range.
    • In males with chondromalacia, patellar height was below average; in females, it was normal.

    Conclusions:

    • The described radiographic method provides a quantitative measure of patellar height.
    • Patellar height may differ between genders in the context of chondromalacia.
    • Further research is warranted to explore the clinical implications of these findings.