Radiographic Alignment of Cervical Spine on a Sample of Asymptomatic Subjects

Abstract

Objective: To present normality parameters for the cervical spine in a sample of the Brazilian population and its distribution by sex and age. Methods: This was a prospective study considering 94 asymptomatic individuals evaluated by panoramic radiograph of the spine for the analysis of the following parameters: cervical lordosis (CL), C2 sagittal vertical axis (SVA-C2), cervical sagittal vertical axis (cSVA), and T1 Slope (TA-T1). The parameter values were compared according to sex and age of individuals. Results: The mean CL was -16.5° (SD: ± 10.8°), SVA-C2 was -3.9 mm (SD: ± 29.2 mm), cSVA was 16.9 mm (SD: ± 10.6 mm) and TA-T1 was 24.8° (SD: ± 7.0°). There was no significant difference between the radiographic parameters when considered with respect to sex and age of individuals (P>0.05). The analysis of correlation among the radiographic parameters showed that the TA-T1 presented the highest correlation with the other parameters, including CL (r= 0.367, P<0.01), SVA-C2 (r= 0.434, P<0.001) and cSVA (r= 0.441, P<0.001). There was also a correlation between SVA-C2 and cSVA (r= 0.32, P= 0.001) and inverse correlation between CL and the cSVA (r= -0.242, P= 0.019). Conclusion: We introduced normality data of the cervical spine alignment in a Brazilian population sample. There was significant correlation among the analyzed parameters, especially considering TA-T1 in relation to the other parameters. (r= -0,242, P= 0,019 5° (DE: ± 10,8°);9 mm (DE: ± 29,2 mm); del EVSC,16,9 mm (DE: ± 10,24,8° (DE: ± 7,0°). No hubo diferencias significativas entre los parámetros radiográficos considerados en relación con el sexo y la edad de los individuos (P>0,05). El análisis de la correlación entre los parámetros radiográficos mostró que el AI-T1 presentó la mayor correlación con los otros parámetros, incluyendo LC (r= 0,367, P <0,01), 434, P <0,001) y EVSC (r= 0,441, P <0,001). También hubo correlación entre 32, P= 0,001) y correlación inversa entre LC y EVSC (r= -0,242, P= 0,019 faixa etária dos indivíduos (P>0,05). A análise da correlação entre os parâmetros radiográficos demonstrou que o AI-T1 apresentou a maior correlação com os demais parâmetros, incluindo LC (r= 0,367, P <0,01), EVS-C2 (r= 0,434, P <0,001) e EVSC (r= 0,441, P <0,001). Houve também correlação entre EVS-C2 e EVSC (r= 0,32, P= 0,001) e correlação inversa entre a LC e o EVSC RESUMEN Objetivo: Presentar los parámetros radiográficos de normalidad para la columna cervical en una muestra de la población brasileña y su distribución por sexo y edad. Métodos: Se realizó un estudio prospectivo considerando 94 individuos asintomáticos evaluados por radiografía panorámica de la columna para el análisis de los siguientes parámetros: lordosis cervical (LC), eje vertical sagital de C2 (EVS-C2), eje vertical sagital cervical (EVSC), ángulo de inclinación de T1 (AI-T1). Los valores de los parámetros se compararon en función del sexo y la edad de los individuos. Resultados: El promedio de la LC fue

Correlation Between Cervical Sagittal Alignment and Functional Capacity in Cervical Spondylosis

“…2,13 The correlation between the TS and the CL, showing that the amount of CL is influenced by the inclination of the upper plateau of T1 (TS), has been published in the literature 21,29,30 and was also evident in our study. A significant correlation between the TS and the cSVA was also confirmed, which indicates the important role of the inclination of T1 for all cervical sagittal alignment, as previously demonstrated in the literature.…”

“…A significant correlation between the TS and the cSVA was also confirmed, which indicates the important role of the inclination of T1 for all cervical sagittal alignment, as previously demonstrated in the literature. 2,29,30 This study also showed the effect of aging on cervical sagittal alignment. As seen in the results obtained, the TS, the CL, and the cSVA tend to increase with age.…”

“…The correlation between the cervical sagittal alignment parameters themselves has been demonstrated in recent studies, 1,21,29 as well as the role of the cervical-thoracic junction in cervical sagittal alignment, similar to what occurs in alignment of the thoracolumbar spine in correlation to the pelvis. 2,13 The correlation between the TS and the CL, showing that the amount of CL is influenced by the inclination of the upper plateau of T1 (TS), has been published in the literature 21,29,30 and was also evident in our study.…”

“…(± 8,3°); de LC,22,4° (± 8,8 °); del AIT1,29,3° (± 6,7,0° (± 7,4°). Se observó una correlación inversa significativa (r = -0,3, p = 0,039) entre NDI y LC, pero no hubo correlación significativa entre LC y EVA.…”

Cervical Lordosis in Asymptomatic Individuals; Systematic Review and Meta-Analysis

“…Bu sistematik derleme ve meta-analize alınan çalışmalarda cervical lordozis asemptomatik kişilerde; cinsiyete göre eğim ve total eğim olarak kategorize edildi (Şekil 2). Çalışmaların dört tanesinde cinsiyete göre cervical lordotik eğrilikler bildirildi [11,18,20,21]. Bu çalışmaların birleştirilmiş sonuçlarındaki kadın eğim açıları arasında %15'sinde farklılık olduğu bildirildi (%95 CI: 0,077-0,285; z= -4,259; p< 0.001; I 2 = %83).…”