Global sagittal alignment after surgery of right thoracic idiopathic scoliosis in adolescents and adults with and without thoracic hypokyphosis

Abstract This study aimed to characterize global sagittal alignment in adolescent idiopathic scoliosis (AIS) with normal kyphosis (NTK, kyphosis > 10°) and with thoracic hypokyphosis (THK, kyphosis < 10°), before and after posterior spinal fusion, and compare them with asymptomatic controls. 2...

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Autores principales:	Kwong Hang Yeung, Gene Chi Wai Man, Wafa Skalli, Zongshan Hu, Vivian Wing Yin Hung, Alec Lik Hang Hung, Tsz Ping Lam, Bobby Kin Wah Ng, Jack Chun Yiu Cheng, Claudio Vergari, Winnie Chiu Wing Chu
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/53ec1153fee04c178fac3bbd9328dabb
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spelling	oai:doaj.org-article:53ec1153fee04c178fac3bbd9328dabb2021-12-02T13:17:42ZGlobal sagittal alignment after surgery of right thoracic idiopathic scoliosis in adolescents and adults with and without thoracic hypokyphosis10.1038/s41598-021-85782-62045-2322https://doaj.org/article/53ec1153fee04c178fac3bbd9328dabb2021-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-85782-6https://doaj.org/toc/2045-2322Abstract This study aimed to characterize global sagittal alignment in adolescent idiopathic scoliosis (AIS) with normal kyphosis (NTK, kyphosis > 10°) and with thoracic hypokyphosis (THK, kyphosis < 10°), before and after posterior spinal fusion, and compare them with asymptomatic controls. 27 AIS girls and young adults with right thoracic curves were included (seventeen with age ≤ 18 years, then age > 21). Biplanar radiographies were acquired at baseline, immediate post-operatively, 1-year and 2-year follow-up, and 3D reconstruction of the spine and pelvis was performed. NTK and THK showed different global sagittal alignment, as well as differences compared to controls. AIS with THK at baseline had higher SVA/SFD (2.0 ± 2.9 vs − 0.4 ± 1.9; P < 0.05) and OD-HA (0.2 ± 1.4° vs − 1.3 ± 1.6°; P < 0.05) than controls, indicating that THK had compensated balance with unusual forward leaning posture. Immediately post-operation, SVA/SFD remained high (1.3 ± 3.0) while OD-HA reversed (− 1.2 ± 1.7°), indicating that THK patients had found partially compensated balance. After 2-yeas, both SVA/SFD (− 1.3 ± 2.1) and OD-HA (− 1.4 ± 0.9°) were normalized. The changes in global sagittal alignment and mechanism of balance are different in AIS with or without THK. As the head plays a critical role on balance during immediate and delayed post-operation, OD-HA can be complementary parameter for assessing global balance during post-operative follow-up of AIS patients with THK.Kwong Hang YeungGene Chi Wai ManWafa SkalliZongshan HuVivian Wing Yin HungAlec Lik Hang HungTsz Ping LamBobby Kin Wah NgJack Chun Yiu ChengClaudio VergariWinnie Chiu Wing ChuNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Kwong Hang Yeung Gene Chi Wai Man Wafa Skalli Zongshan Hu Vivian Wing Yin Hung Alec Lik Hang Hung Tsz Ping Lam Bobby Kin Wah Ng Jack Chun Yiu Cheng Claudio Vergari Winnie Chiu Wing Chu Global sagittal alignment after surgery of right thoracic idiopathic scoliosis in adolescents and adults with and without thoracic hypokyphosis
description	Abstract This study aimed to characterize global sagittal alignment in adolescent idiopathic scoliosis (AIS) with normal kyphosis (NTK, kyphosis > 10°) and with thoracic hypokyphosis (THK, kyphosis < 10°), before and after posterior spinal fusion, and compare them with asymptomatic controls. 27 AIS girls and young adults with right thoracic curves were included (seventeen with age ≤ 18 years, then age > 21). Biplanar radiographies were acquired at baseline, immediate post-operatively, 1-year and 2-year follow-up, and 3D reconstruction of the spine and pelvis was performed. NTK and THK showed different global sagittal alignment, as well as differences compared to controls. AIS with THK at baseline had higher SVA/SFD (2.0 ± 2.9 vs − 0.4 ± 1.9; P < 0.05) and OD-HA (0.2 ± 1.4° vs − 1.3 ± 1.6°; P < 0.05) than controls, indicating that THK had compensated balance with unusual forward leaning posture. Immediately post-operation, SVA/SFD remained high (1.3 ± 3.0) while OD-HA reversed (− 1.2 ± 1.7°), indicating that THK patients had found partially compensated balance. After 2-yeas, both SVA/SFD (− 1.3 ± 2.1) and OD-HA (− 1.4 ± 0.9°) were normalized. The changes in global sagittal alignment and mechanism of balance are different in AIS with or without THK. As the head plays a critical role on balance during immediate and delayed post-operation, OD-HA can be complementary parameter for assessing global balance during post-operative follow-up of AIS patients with THK.
format	article
author	Kwong Hang Yeung Gene Chi Wai Man Wafa Skalli Zongshan Hu Vivian Wing Yin Hung Alec Lik Hang Hung Tsz Ping Lam Bobby Kin Wah Ng Jack Chun Yiu Cheng Claudio Vergari Winnie Chiu Wing Chu
author_facet	Kwong Hang Yeung Gene Chi Wai Man Wafa Skalli Zongshan Hu Vivian Wing Yin Hung Alec Lik Hang Hung Tsz Ping Lam Bobby Kin Wah Ng Jack Chun Yiu Cheng Claudio Vergari Winnie Chiu Wing Chu
author_sort	Kwong Hang Yeung
title	Global sagittal alignment after surgery of right thoracic idiopathic scoliosis in adolescents and adults with and without thoracic hypokyphosis
title_short	Global sagittal alignment after surgery of right thoracic idiopathic scoliosis in adolescents and adults with and without thoracic hypokyphosis
title_full	Global sagittal alignment after surgery of right thoracic idiopathic scoliosis in adolescents and adults with and without thoracic hypokyphosis
title_fullStr	Global sagittal alignment after surgery of right thoracic idiopathic scoliosis in adolescents and adults with and without thoracic hypokyphosis
title_full_unstemmed	Global sagittal alignment after surgery of right thoracic idiopathic scoliosis in adolescents and adults with and without thoracic hypokyphosis
title_sort	global sagittal alignment after surgery of right thoracic idiopathic scoliosis in adolescents and adults with and without thoracic hypokyphosis
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/53ec1153fee04c178fac3bbd9328dabb
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Global sagittal alignment after surgery of right thoracic idiopathic scoliosis in adolescents and adults with and without thoracic hypokyphosis

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