2024-03-29T02:39:56Z
https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:00023144
2023-01-16T04:12:50Z
499:500:501
Analysis of cervical kyphosis and spinal balance in young idiopathic scoliosis patients classified by the apex of thoracic kyphosis
Ito, Kenyu
68627
Imagama, Shiro
68628
Ito, Zenya
68629
Ando, Kei
68630
Kobayashi, Kazuyoshi
68631
Hida, Tetsuro
68632
Tsushima, Mikito
68633
Ishikawa, Yoshimoto
68634
Matsumoto, Akiyuki
68635
Nishida, Yoshihiro
68636
Ishiguro, Naoki
68637
Scoliosis
Cervical
Sagittal
Kyphosis
Classification
Purpose Sagittal balance has recently been the focus of studies aimed at understanding the correction force required for both coronal and sagittal malalignment. However, the correlation between cervical kyphosis and sagittal balance in AIS patients has yet to be thoroughly investigated. This study aimed to clarify the correlation between cervical alignment and spinal balance in patients with adolescent idiopathic scoliosis (AIS). Here, we hypothesized that cervical kyphosis patients can be classified into groups by the apex of thoracic kyphosis. Methods This study included 92 AIS patients (84 females, 8 males; mean age, 15.1 years). Patients were divided into the cervical lordosis (CL), cervical sigmoid (CS), or cervical kyphosis (CK) groups and further classified according to the apex of thoracic kyphosis into High (above T3), Middle (T4–T9), and Low (below T10) groups. Results There were 17 (18.5 %), 22 (23.9 %), and 53 (57.6 %) patients with CL, CS, and CK, respectively. In the CK group, 13 had CK-High, 35 had CK-Middle, and 5 had CK-Low. The C7 sagittal vertical axis (C7SVA) measurements were most backward in CK-High and most forward in CK-Low. The T5-12 kyphosis (TK) measurement was significantly lower in CK-High. Conclusions Most AIS patients had kyphotic cervical alignment. Patients with CK can be classified as having CK-High, CK-Middle, or CK-Low according to the apex of thoracic kyphosis. CK-High is due to thoracic hypokyphosis with a backward balanced C7SVA. CK-Middle is well-balanced cervical kyphosis. CK-Low has forward-bent global kyphosis of the cervicothoracic spine that positioned the C7SVA forward.
journal article
Springer
2016-10
application/pdf
European Spine Journal
10
25
3220
3225
http://doi.org/10.1007/s00586-016-4699-6
http://hdl.handle.net/2237/25339
0940-6719
https://nagoya.repo.nii.ac.jp/record/23144/files/ESJO-D-16-00122_R2_re_v2.pdf
eng
https://doi.org/10.1007/s00586-016-4699-6
The final publication is available at Springer via http://doi.org/10.1007/s00586-016-4699-6