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Alterations of 3D acetabular and lower limb parameters in adolescent idiopathic scoliosis

Article dans une revue avec comité de lecture
Author
KARAM, Mohammad
301405 Université Saint-Joseph de Beyrouth [USJ]
BIZDIKIAN, Aren Joe
301405 Université Saint-Joseph de Beyrouth [USJ]
KHALIL, Nour
301405 Université Saint-Joseph de Beyrouth [USJ]
BAKOUNY, Ziad
301405 Université Saint-Joseph de Beyrouth [USJ]
OBEID, Ibrahim
300122 Centre Hospitalier Universitaire de Bordeaux [CHU Bordeaux]
GHANIMEH, Joe
301405 Université Saint-Joseph de Beyrouth [USJ]
LABAKI, Chris
301405 Université Saint-Joseph de Beyrouth [USJ]
MJAESS, Georges
301405 Université Saint-Joseph de Beyrouth [USJ]
KARAM, Aya
301405 Université Saint-Joseph de Beyrouth [USJ]
ccSKALLI, Wafa
1001017 Institut de Biomécanique Humaine Georges Charpak [IBHGC]
KHARRAT, Khalil
301405 Université Saint-Joseph de Beyrouth [USJ]
GHANEM, Ismat
301405 Université Saint-Joseph de Beyrouth [USJ]
ASSI, Ayman
1001017 Institut de Biomécanique Humaine Georges Charpak [IBHGC]

URI
http://hdl.handle.net/10985/19358
DOI
10.1007/s00586-020-06397-5
Date
2020
Journal
European Spine Journal

Abstract

Purpose: To evaluate the 3D deformity of the acetabula and lower limbs in subjects with adolescent idiopathic scoliosis (AIS) and their relationship with spino-pelvic alignment. Methods: Two hundred and seventy-four subjects with AIS (frontal Cobb: 33.5° ± 18° [10°-110°]) and 84 controls were enrolled. All subjects underwent full-body biplanar X-rays with subsequent 3D reconstructions. Classic spino-pelvic and lower limb parameters were collected as well as acetabular parameters: acetabular orientation in the 3 planes (tilt, anteversion and abduction), center-edge angle (CEA) and anterior and posterior sector angles. Subjects with AIS were represented by both lower limb sides and classified by elevated (ES) or lowered (LS), depending on the frontal pelvic obliquity. Parameters were then compared between groups. Determinants of acetabular and lower limb alterations were investigated among spino-pelvic parameters. Results: Acetabular abduction was higher on the ES in AIS (59.2° ± 6°) when compared to both LS (55.6° ± 6°) and controls (57.5° ± 3.9°, p < 0.001). CEA and acetabular anteversion were higher on the LS in AIS (32° ± 6.1°, 20.5° ± 5.7°) when compared to both ES (28.7° ± 5.1°, 19.8° ± 5.1°) and controls (29.8° ± 4.8°, 19.1° ± 4°, respectively, p < 0.001). Anterior sector angle was lower on both ES and LS in AIS when compared to controls. CEA, acetabular abduction and acetabular anteversion were found to be mostly determined (adjusted R2: 0.08-0.32) by pelvic tilt and less by frontal pelvic obliquity, frontal Cobb and T1T12. Conclusions: Subjects with AIS had a more abducted acetabulum at the lowered side, more anteverted acetabulum and a lack of anterior coverage of both acetabula. These alterations were strongly related to pelvic tilt.

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