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Related Experiment Video

Updated: Jul 15, 2026

Three-Dimensional Preoperative Virtual Planning in Derotational Proximal Femoral Osteotomy
08:15

Three-Dimensional Preoperative Virtual Planning in Derotational Proximal Femoral Osteotomy

Published on: February 17, 2023

ASKyphoplan: a program for deformity planning in ankylosing spondylitis.

Barend J van Royen1, Famke J Scheerder, Eric Jansen

  • 1Department of Orthopaedic Surgery, VU University Medical Center, P.O. Box 7057, 1007, MB Amsterdam, The Netherlands. bj.vanroyen@vumc.nl

European Spine Journal : Official Publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society
|April 19, 2007
PubMed
Summary

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Eccentric Axial Loading in a Plane of Symmetry01:16

Eccentric Axial Loading in a Plane of Symmetry

Eccentric axial loading occurs when an axial load is applied away from the centroidal axis of a structural member. This scenario is common in engineering, where structural elements may not be directly aligned due to various design or functional requirements.

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A new computer program, ASKyphoplan, simplifies surgical planning for spinal osteotomies in ankylosing spondylitis (AS). It accurately predicts how spinal correction affects balance and gaze, aiding surgeons in complex cases.

Area of Science:

  • Orthopedics
  • Spinal Surgery
  • Medical Software Development

Background:

  • Ankylosing spondylitis (AS) can cause progressive thoracolumbar kyphotic deformity, necessitating surgical correction for posture and spinal balance.
  • Predicting the surgical outcomes on sagittal balance and horizontal gaze is crucial but complex due to the interplay of correction angle and osteotomy level.

Observation:

  • Traditional mathematical equations for predicting spinal sagittal balance are difficult to apply in daily practice.
  • The effect of spinal osteotomy on horizontal gaze is directly proportional to the osteotomy angle.

Findings:

  • The ASKyphoplan computer program analyzes and visualizes planning for sagittal plane corrective osteotomies in AS.
  • It integrates the relationships between planned correction angle, osteotomy level, and sagittal balance into an accessible tool.

Related Experiment Videos

Last Updated: Jul 15, 2026

Three-Dimensional Preoperative Virtual Planning in Derotational Proximal Femoral Osteotomy
08:15

Three-Dimensional Preoperative Virtual Planning in Derotational Proximal Femoral Osteotomy

Published on: February 17, 2023

  • Clinical application is demonstrated through a patient case treated with lumbar osteotomy for AS.

    • Implications:

    • ASKyphoplan offers a practical solution for surgeons planning spinal osteotomies in AS patients.
    • Improved planning can lead to more reliable prediction of surgical outcomes, enhancing patient posture and horizontal gaze.
    • The software is freely available online, promoting wider adoption and research in spinal deformity correction.