The grand piano ratio: an adjunctive intraoperative screening tool for detecting excessive femoral component external rotation in total knee arthroplasty - Takeaways - MDSpire

The grand piano ratio: an adjunctive intraoperative screening tool for detecting excessive femoral component external rotation in total knee arthroplasty

  • By

  • Özgür Avci

  • Alpaslan Öztürk

  • Burak Olcay Güler

  • Hünkar Çağdaş Bayrak

  • Ali Ömer Kaya

  • Yakup Doğan

  • July 7, 2026

  • 0 min

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  • 1

    Correct rotational alignment of the femoral component in total knee arthroplasty is crucial for knee stability and long-term prosthesis durability.

  • 2

    Incorrect femoral component rotation can lead to complications such as chronic pain, stiffness, and patient dissatisfaction after total knee arthroplasty.

  • 3

    The grand piano sign is a visual verification mechanism for assessing femoral component rotation during total knee arthroplasty.

  • 4

    This study evaluates the intraoperative grand piano ratio's correlation with postoperative femoral component rotation using advanced imaging techniques.

  • 5

    MAVRIC MRI was used to assess postoperative femoral component rotation, providing reliable visualization while minimizing metal artefacts.

Original Source(s)

The grand piano ratio: an adjunctive intraoperative screening tool for detecting excessive femoral component external rotation in total knee arthroplasty

  • by Özgür Avci, Alpaslan Öztürk, Burak Olcay Güler, Hünkar Çağdaş Bayrak, Ali Ömer Kaya, Yakup Doğan

  • July 7, 2026

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