Abstract

Foi estudado, em indivíduos normais, o valor angular da lordose lombar e a participação dos corpos vertebrais e discos intervertebrais na sua composição. Foram avaliadas as radiografias da coluna lombar de 350 indivíduos normais e assintomáticos com a idade variando de 18 a 50 anos (média 29,0 anos ± 8,24), sendo 143 homens e 207 mulheres. Foram medidas a curvatura lombossacra (L1S1) e a curvatura lombolombar (L1L5). As medidas das curvaturas lombares e dos seus componentes apresentaram grande variabilidade. Foram observados valores médios de -61° para a curvatura lombossacra e de -45° para a curvatura lombolombar. As medidas dos corpos vertebrais apresentaram valores cifóticos para L1, neutros para L2, e progressivamente lordóticos de L3 a L5. Os discos intervertebrais apresentaram angulação lordótica progressiva desde L1-L2. Os elementos caudais da curvatura, discos intervertebrais L4-L5 e L5-S1 e o corpo vertebral L5 corresponderam a quase 60% medida angular da curvatura lombossacra. Foi observada diferença significante entre os sexos masculino e feminino para as medidas das curvaturas lombares, e dos corpos vertebrais L2 e L4, tendo sido observados valores maiores no sexo feminino. Foram observadas diferenças relacionadas à idade na medida das curvaturas lombares e dos corpos vertebrais.

Highlights

  • The vertebral spine presents regional curves on sagittal plane designed to absorb impact, reduce its longitudinal stiffness, and intensify muscular function [1]

  • By assessing male subjects separately, we found that the differences between lumbar curvature measurements and its components’ at the different age groups were subtler, with no significant difference being found

  • There was a progressive increase of percent participation of more caudal elements of the lumbosacral curvature, with distal segment constituted of vertebral body L5 and intervertebral discs L4-L5 and L5-S1 accounting for 60% of lumbar curvature magnitude

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Summary

Introduction

The vertebral spine presents regional curves on sagittal plane designed to absorb impact, reduce its longitudinal stiffness, and intensify muscular function [1]. Values of sagittal curves measurements on spine present great variability in normal individuals, with a wide variation range for those, within normality limits. That great measurements variation must be considered as physiological, indicative, but not normative [2]. Lumbar lordosis has long been studied, and its curvature is associated with various factors, such as thoracic curvature, age, gender, pelvic bend, among others. The objective of this study was to measure lumbar curvature, and vertebral bodies and intervertebral discs angles in normal individuals, aiming to observe lumbar lordosis values and the role of vertebral bodies and intervertebral discs in its composition, considering a potential age and gender bias

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