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

European spine journal

article

Mohammad Karam¹  Aren Joe Bizdikian¹  Nour Khalil¹  Ziad Bakouny¹  Ibrahim Obeid²  Joe Ghanimeh¹  Chris Labaki¹  Georges Mjaess¹  Aya Karam¹  Wafa Skalli³  Khalil Kharrat¹  Ismat Ghanem¹  Ayman Assi¹ 

[1] Laboratory of Biomechanics and Medical Imaging, Faculty of Medicine, University of Saint-Joseph in Beirut;Bordeaux University Hospital;Institut de Biomécanique Humaine Georges Charpak

关键词: Adolescent idiopathic scoliosis;    Acetabulum;    Lower limbs;    3D reconstructions;    Spine;   

DOI  :  10.1007/s00586-020-06397-5

来源: Springer

【 摘 要 】

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. 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. 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. 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.

【 授权许可】

Unknown