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In slope-changing osteotomy one millimeter is not one degree: results of an artificial intelligence-automated software analysis

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Abstract

Background

Anterior closing wedge osteotomies (ACWO) are performed in revision anterior cruciate ligament (ACL) surgery to correct an excessive posterior tibial slope (PTS).

Purpose

With the help of automated planning software, this study investigates the assumption that 1mm of wedge height gives 1° of slope correction (1:1).

Methods

Fifty patients underwent ACWO, with the wedge height calculated using the 1:1 formula. Pre- and postosteotomy PTS were measured manually, and the achieved post-operative PTS was compared with the target PTS of 5.3° ± 1.9. The X-ray analysis was repeated virtually with the automated software, which also recommended a resection height. These parameters were then compared with the manually obtained parameters.

Results

Using a 1:1 formula, wedge heights of 8.5mm ± 2.3 was resected to achieve a PTS of 4.2° ± 0.32. This showed an overcorrection of 1.6° ± 0.8 from the target slope. This was consistent with the data from the automated software, which recommended a lower wedge height of 7.7mm ± 2.9.

Conclusion

In trans-tubercle ACW, using a wedge height (mm) to slope correction (°) ratio of 1:1 can lead to slight over-correction. Automated software planning is useful for planning correction osteotomies in the sagittal plane.

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Change history

  • 09 March 2023

    Author name tagging correction. The correct family name should be Bernard de Villeneuve.

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Authors and Affiliations

  1. Department of Orthopaedic Surgery, Singapore General Hospital, 20 College Road, Academia Level 4, Singapore, 169856, Singapore

    Chia Zi Yang

  2. Department of Orthopedic Surgery, Faculty of Medicine, Assiut University Hospitals, Assiut, Egypt

    Mohammed Anter Abdelhameed

  3. Department of Surgery, College of Medicine, Jouf University, Sakaka, Saudi Arabia

    Bandar Nasser AlMaeen

  4. Institute for Movement and Locomotion, Hôpital Sainte-Marguerite, Aix-Marseille Université, ISM, 270, Boulevard Sainte-Marguerite, 13009, Marseille, France

    Florent Bernard de Villeneuve, Christophe Jacquet & Matthieu Ollivier

  5. Hospital CUF Santarém, Santarém, Portugal

    Levi Reina Fernandes

Authors
  1. Chia Zi Yang
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  2. Mohammed Anter Abdelhameed
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  3. Bandar Nasser AlMaeen
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  4. Florent Bernard de Villeneuve
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  5. Levi Reina Fernandes
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  6. Christophe Jacquet
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  7. Matthieu Ollivier
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Corresponding author

Correspondence to Matthieu Ollivier.

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Informed consent was obtained from all individual participants included in the study.

Conflict of interest

MO is an educational consultant for newclip technique. LRF is a chief medical officer for PeekMed.

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Yang, C.Z., Abdelhameed, M.A., AlMaeen, B.N. et al. In slope-changing osteotomy one millimeter is not one degree: results of an artificial intelligence-automated software analysis. International Orthopaedics (SICOT) 47, 915–920 (2023). https://doi.org/10.1007/s00264-022-05676-8

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  • DOI: https://doi.org/10.1007/s00264-022-05676-8

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