Erschienen in:

03.04.2020 | Original Article

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

verfasst von: Mohammad Karam, Aren Joe Bizdikian, Nour Khalil, Ziad Bakouny, Ibrahim Obeid, Joe Ghanimeh, Chris Labaki, Georges Mjaess, Aya Karam, Wafa Skalli, Khalil Kharrat, Ismat Ghanem, Ayman Assi

Erschienen in: European Spine Journal | Ausgabe 8/2020

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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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Titel: Alterations of 3D acetabular and lower limb parameters in adolescent idiopathic scoliosis
verfasst von: Mohammad Karam
Aren Joe Bizdikian
Nour Khalil
Ziad Bakouny
Ibrahim Obeid
Joe Ghanimeh
Chris Labaki
Georges Mjaess
Aya Karam
Wafa Skalli
Khalil Kharrat
Ismat Ghanem
Ayman Assi
Publikationsdatum: 03.04.2020
Verlag: Springer Berlin Heidelberg
Erschienen in: European Spine Journal / Ausgabe 8/2020
Print ISSN: 0940-6719
Elektronische ISSN: 1432-0932
DOI: https://doi.org/10.1007/s00586-020-06397-5

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Springer Medizin

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

Abstract

Purpose

Methods

Results

Conclusions

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