However, the definition of “normal” cervical spine morphology remains ambiguous.Ĭervical lordosis is considered to be the natural curve as the result of the development and balancing of the thoracic kyphosis. It has been recognized that the normal function of the cervical spine largely relies on the cervical sagittal alignment, while abnormal morphology can cause pain, degeneration, disability and poor operative outcomes. Over the past few decades, an increasing number of studies have focused on cervical sagittal alignment. Cervical regional sagittal alignment parameters are not correlated with lumbosacral parameters, and C2-7 Cobb, C7 Slope showed significant differences between males and females. C7 slope is an important predictor of global sagittal balance and C2-7PL is a key parameter for restoring cervical lordosis, which should be considered pre-operatively and for conservative treatment. Combining different classification methods provides a better understanding of the morphology of the cervical spine. The cervical spine morphology of asymptomatic adolescents varies widely, from lordotic to kyphotic. C7 slope and C2-7PL were significantly different between the two groups. According to C2-C7 Cobb, there were 80 Lordotic cases (72.1%). Using a modified method of Toyama to describe the cervical spine morphology, there were 37 cases (33.3%) in the Lordotic group, and C7 slope, C2-7 Cobb and C2-7PL showed significant differences between groups. C2-7 Cobb, C7 Slope showed significant differences between the male and female groups. Resultsįorty-four males and sixty-seven females with a mean age of 16.12 ± 2.40 years were included in this study. Sagittal alignment parameters, including C7 Slope, C2-C7 Cobb, C2-7 plumb line (PL), C2-S1 Sagittal Vertical Axis (SVA), C7-S1 SVA, T5-12 Cobb, T10-L2 Cobb, L1-S1 Cobb, pelvic incidence (PI), pelvic tilt (PT) and sacral slope (SS), were obtained from lateral radiographs. MethodsĪ total of 111 adolescent subjects were included. To describe the cervical spine morphology and explore its relationship to global sagittal alignment parameters in the asymptomatic adolescent population.
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