Association between global sagittal malalignment and increasing hip joint contact force, analyzed by a novel musculoskeletal modeling system.

Patients with adult spinal deformity have various standing postures. Although several studies have reported a relationship between sagittal alignment and exacerbation of hip osteoarthritis, information is limited regarding how spinopelvic sagittal alignment changes affect hip joint loading. This stu...

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Autores principales:	Takanori Miura, Naohisa Miyakoshi, Kimio Saito, Hiroaki Kijima, Jumpei Iida, Kazutoshi Hatakeyama, Kotaro Suzuki, Akira Komatsu, Takehiro Iwami, Tosiki Matsunaga, Yoichi Shimada
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/009dd9281e684a81ac00b9b2c95877d6
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spelling	oai:doaj.org-article:009dd9281e684a81ac00b9b2c95877d62021-12-02T20:16:28ZAssociation between global sagittal malalignment and increasing hip joint contact force, analyzed by a novel musculoskeletal modeling system.1932-620310.1371/journal.pone.0259049https://doaj.org/article/009dd9281e684a81ac00b9b2c95877d62021-01-01T00:00:00Zhttps://doi.org/10.1371/journal.pone.0259049https://doaj.org/toc/1932-6203Patients with adult spinal deformity have various standing postures. Although several studies have reported a relationship between sagittal alignment and exacerbation of hip osteoarthritis, information is limited regarding how spinopelvic sagittal alignment changes affect hip joint loading. This study aimed to investigate the relationship between sagittal spinopelvic-lower limb alignment and the hip joint contact force (HCF) using a novel musculoskeletal model. We enrolled 20 women (78.3±6.7 years) from a single institution. Standing lateral radiographs were acquired to measure thoracic kyphosis, lumbar lordosis, the pelvic tilt, sacral slope, sagittal vertical axis (SVA), femur obliquity angle, and knee flexion angle. In the model simulation, the Anybody Modeling System was used, which alters muscle pathways using magnetic resonance imaging data. Each patient's alignment was entered into the model; the HCF and hip moment in the standing posture were calculated using inverse dynamics analysis. The relationship between the HCF and each parameter was examined using Spearman's correlation coefficient (r). The patients were divided into low SVA and high SVA groups, with a cutoff value of 50 mm for the SVA. The HCF was 168.2±60.1 N (%BW) and positively correlated with the SVA (r = 0.6343, p<0.01) and femur obliquity angle (r = 0.4670, p = 0.03). The HCF were 122.2 and 214.1 N (75.2% difference) in the low SVA and high SVA groups, respectively (p<0.01). The flexion moment was also increased in the high SVA group compared with that in the low SVA group (p = 0.03). The SVA and femur obliquity angle are factors related to the HCF, suggesting an association between adult spinal deformity and the exacerbation of hip osteoarthritis. Future studies will need to assess the relationship between the hip joint load and sagittal spinopelvic parameters in dynamic conditions.Takanori MiuraNaohisa MiyakoshiKimio SaitoHiroaki KijimaJumpei IidaKazutoshi HatakeyamaKotaro SuzukiAkira KomatsuTakehiro IwamiTosiki MatsunagaYoichi ShimadaPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 16, Iss 10, p e0259049 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Takanori Miura Naohisa Miyakoshi Kimio Saito Hiroaki Kijima Jumpei Iida Kazutoshi Hatakeyama Kotaro Suzuki Akira Komatsu Takehiro Iwami Tosiki Matsunaga Yoichi Shimada Association between global sagittal malalignment and increasing hip joint contact force, analyzed by a novel musculoskeletal modeling system.
description	Patients with adult spinal deformity have various standing postures. Although several studies have reported a relationship between sagittal alignment and exacerbation of hip osteoarthritis, information is limited regarding how spinopelvic sagittal alignment changes affect hip joint loading. This study aimed to investigate the relationship between sagittal spinopelvic-lower limb alignment and the hip joint contact force (HCF) using a novel musculoskeletal model. We enrolled 20 women (78.3±6.7 years) from a single institution. Standing lateral radiographs were acquired to measure thoracic kyphosis, lumbar lordosis, the pelvic tilt, sacral slope, sagittal vertical axis (SVA), femur obliquity angle, and knee flexion angle. In the model simulation, the Anybody Modeling System was used, which alters muscle pathways using magnetic resonance imaging data. Each patient's alignment was entered into the model; the HCF and hip moment in the standing posture were calculated using inverse dynamics analysis. The relationship between the HCF and each parameter was examined using Spearman's correlation coefficient (r). The patients were divided into low SVA and high SVA groups, with a cutoff value of 50 mm for the SVA. The HCF was 168.2±60.1 N (%BW) and positively correlated with the SVA (r = 0.6343, p<0.01) and femur obliquity angle (r = 0.4670, p = 0.03). The HCF were 122.2 and 214.1 N (75.2% difference) in the low SVA and high SVA groups, respectively (p<0.01). The flexion moment was also increased in the high SVA group compared with that in the low SVA group (p = 0.03). The SVA and femur obliquity angle are factors related to the HCF, suggesting an association between adult spinal deformity and the exacerbation of hip osteoarthritis. Future studies will need to assess the relationship between the hip joint load and sagittal spinopelvic parameters in dynamic conditions.
format	article
author	Takanori Miura Naohisa Miyakoshi Kimio Saito Hiroaki Kijima Jumpei Iida Kazutoshi Hatakeyama Kotaro Suzuki Akira Komatsu Takehiro Iwami Tosiki Matsunaga Yoichi Shimada
author_facet	Takanori Miura Naohisa Miyakoshi Kimio Saito Hiroaki Kijima Jumpei Iida Kazutoshi Hatakeyama Kotaro Suzuki Akira Komatsu Takehiro Iwami Tosiki Matsunaga Yoichi Shimada
author_sort	Takanori Miura
title	Association between global sagittal malalignment and increasing hip joint contact force, analyzed by a novel musculoskeletal modeling system.
title_short	Association between global sagittal malalignment and increasing hip joint contact force, analyzed by a novel musculoskeletal modeling system.
title_full	Association between global sagittal malalignment and increasing hip joint contact force, analyzed by a novel musculoskeletal modeling system.
title_fullStr	Association between global sagittal malalignment and increasing hip joint contact force, analyzed by a novel musculoskeletal modeling system.
title_full_unstemmed	Association between global sagittal malalignment and increasing hip joint contact force, analyzed by a novel musculoskeletal modeling system.
title_sort	association between global sagittal malalignment and increasing hip joint contact force, analyzed by a novel musculoskeletal modeling system.
publisher	Public Library of Science (PLoS)
publishDate	2021
url	https://doaj.org/article/009dd9281e684a81ac00b9b2c95877d6
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Association between global sagittal malalignment and increasing hip joint contact force, analyzed by a novel musculoskeletal modeling system.

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