Previous studies have reported that the alignments of the occipital-cervical and subaxial spine were closely interrelated in asymptomatic individuals; however, none have focused on a population with atlantoaxial dislocation. From 2007 to 2011, 298 patients with atlantoaxial dislocation and atlas occipitalization were studied. Angles formed between Occiput-C2 and C2-C7 were measured. The relationship between the alignment of the occipital-cervical junction and the subaxial cervical spine was evaluated. The range of values for the angles measured was as followed: the Occiput-C2 angles were -35.2A degrees to 44.8A degrees, and the C2-C7 angles were -17.4A degrees to 77.8A degrees. Statistically significant negative correlations were observed between the Occiput-C2 and C2-C7 angles. Anterior dislocations of the atlas are associated with diminished lordosis or even kyphosis of the occipital-cervical junction, and result in compensatory hyperlordosis of the subaxial cervical spine, collectively presenting as a "swan neck" deformity. Atlantoaxial dislocation may influence the global cervical alignment.
机构:
Hokkaido Univ, Dept Orthopaed Surg, Grad Sch Med, Kita Ku, Sapporo, Hokkaido 0608638, JapanHokkaido Univ, Dept Orthopaed Surg, Grad Sch Med, Kita Ku, Sapporo, Hokkaido 0608638, Japan
Yoshimoto, H
;
Ito, M
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Hokkaido Univ, Dept Orthopaed Surg, Grad Sch Med, Kita Ku, Sapporo, Hokkaido 0608638, JapanHokkaido Univ, Dept Orthopaed Surg, Grad Sch Med, Kita Ku, Sapporo, Hokkaido 0608638, Japan
Ito, M
;
Abumi, K
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Hokkaido Univ, Dept Orthopaed Surg, Grad Sch Med, Kita Ku, Sapporo, Hokkaido 0608638, JapanHokkaido Univ, Dept Orthopaed Surg, Grad Sch Med, Kita Ku, Sapporo, Hokkaido 0608638, Japan
Abumi, K
;
Kotani, Y
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Hokkaido Univ, Dept Orthopaed Surg, Grad Sch Med, Kita Ku, Sapporo, Hokkaido 0608638, JapanHokkaido Univ, Dept Orthopaed Surg, Grad Sch Med, Kita Ku, Sapporo, Hokkaido 0608638, Japan
Kotani, Y
;
Shono, Y
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Hokkaido Univ, Dept Orthopaed Surg, Grad Sch Med, Kita Ku, Sapporo, Hokkaido 0608638, JapanHokkaido Univ, Dept Orthopaed Surg, Grad Sch Med, Kita Ku, Sapporo, Hokkaido 0608638, Japan
Shono, Y
;
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Takada, T
;
Minami, A
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Hokkaido Univ, Dept Orthopaed Surg, Grad Sch Med, Kita Ku, Sapporo, Hokkaido 0608638, JapanHokkaido Univ, Dept Orthopaed Surg, Grad Sch Med, Kita Ku, Sapporo, Hokkaido 0608638, Japan
机构:
Hokkaido Univ, Dept Orthopaed Surg, Grad Sch Med, Kita Ku, Sapporo, Hokkaido 0608638, JapanHokkaido Univ, Dept Orthopaed Surg, Grad Sch Med, Kita Ku, Sapporo, Hokkaido 0608638, Japan
Yoshimoto, H
;
Ito, M
论文数: 0引用数: 0
h-index: 0
机构:
Hokkaido Univ, Dept Orthopaed Surg, Grad Sch Med, Kita Ku, Sapporo, Hokkaido 0608638, JapanHokkaido Univ, Dept Orthopaed Surg, Grad Sch Med, Kita Ku, Sapporo, Hokkaido 0608638, Japan
Ito, M
;
Abumi, K
论文数: 0引用数: 0
h-index: 0
机构:
Hokkaido Univ, Dept Orthopaed Surg, Grad Sch Med, Kita Ku, Sapporo, Hokkaido 0608638, JapanHokkaido Univ, Dept Orthopaed Surg, Grad Sch Med, Kita Ku, Sapporo, Hokkaido 0608638, Japan
Abumi, K
;
Kotani, Y
论文数: 0引用数: 0
h-index: 0
机构:
Hokkaido Univ, Dept Orthopaed Surg, Grad Sch Med, Kita Ku, Sapporo, Hokkaido 0608638, JapanHokkaido Univ, Dept Orthopaed Surg, Grad Sch Med, Kita Ku, Sapporo, Hokkaido 0608638, Japan
Kotani, Y
;
Shono, Y
论文数: 0引用数: 0
h-index: 0
机构:
Hokkaido Univ, Dept Orthopaed Surg, Grad Sch Med, Kita Ku, Sapporo, Hokkaido 0608638, JapanHokkaido Univ, Dept Orthopaed Surg, Grad Sch Med, Kita Ku, Sapporo, Hokkaido 0608638, Japan
Shono, Y
;
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h-index:
机构:
Takada, T
;
Minami, A
论文数: 0引用数: 0
h-index: 0
机构:
Hokkaido Univ, Dept Orthopaed Surg, Grad Sch Med, Kita Ku, Sapporo, Hokkaido 0608638, JapanHokkaido Univ, Dept Orthopaed Surg, Grad Sch Med, Kita Ku, Sapporo, Hokkaido 0608638, Japan