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Personalised gravitational loading of the cervical spine from biplanar X-rays for asymptomatic and clinical subjects in neutral standing position

Article dans une revue avec comité de lecture
Author
MUTH-SENG, Christophe
1001017 Institut de Biomécanique Humaine Georges Charpak [IBHGC]
HUNEIDI, Maxime
408207 CHU de Bordeaux Pellegrin [Bordeaux]
HEIDSIECK, Cécile
1001017 Institut de Biomécanique Humaine Georges Charpak [IBHGC]
LAPORTE, Sébastien
1001017 Institut de Biomécanique Humaine Georges Charpak [IBHGC]
LE COZ, Jean-Yves
1001017 Institut de Biomécanique Humaine Georges Charpak [IBHGC]
GILLE, Olivier
408207 CHU de Bordeaux Pellegrin [Bordeaux]
SKALLI, Wafa
1001017 Institut de Biomécanique Humaine Georges Charpak [IBHGC]

URI
http://hdl.handle.net/10985/21840
DOI
10.1016/j.clinbiomech.2022.105577
Date
2022
Journal
Clinical Biomechanics

Abstract

Background As a leading cause of disability with a high societal and economic cost, it is crucial to better understand risk factors of neck pain and surgical complications. Getting subject-specific external loading is essential for quantifying muscle forces and joint loads but it requires exertion trials and load cells which are uncommon in clinical settings. Methods This paper presents a method to compute the gravitational loading at four levels of the cervical spine (C3C4, C4C5, C5C6, C6C7) in neutral standing position from biplanar radiographs exclusively. The resulting load was decomposed in local disc frames and its components were used to compare different populations: 118 asymptomatic subjects and 46 patients before and after surgery (anterior cervical discectomy and fusion or total disc replacement). Comparisons were performed at C6C7 and the upper level adjacent to surgery. Findings Significant changes in gravitational loading were observed with age in healthy subjects as well as in patients after surgery and have been associated with changes in posture. Interpretation This approach quantifies the influence of postural changes on gravitational loading on the cervical spine. It represents a simple way to obtain necessary input for muscle force quantification models in clinical routine and to use them for patient evaluation. The study of the subsequent subject-specific spinal loading could help further the understanding of cervical spine biomechanics, degeneration mechanisms and complications following surgery.

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