The sagittal plane of the spine has four physiological curvatures, and there should be no curvature on the frontal plane. Once there is curvature on both sides, it is called scoliosis. Scoliosis is a clinical symptom caused by various etiologies, which can be summarized into two major categories, namely functional scoliosis and structural scoliosis. Functional scoliosis, that is, compensatory scoliosis, does not have internal destruction of the spinal structure. The deformity, in addition to poor posture, also has some organ deformities formed by compensation, such as unequal length of the lower limbs, pelvic tilt secondary to hip adduction or abduction, sciatica, etc. X-ray characteristics: no destruction of spinal structure, the spine only presents a C-shaped curvature. Structural scoliosis: caused by pathological changes in the bones, muscles, and nerves of the spine.
A structural lateral curvature of the spine, scoliosis during the period of growth and development with an unclear cause is called idiopathic scoliosis. 60% to 80% of the cases occur in girls. 2% to 3% of children aged 10 to 16 can be detected with scoliosis. It may be suspected for the first time when one shoulder blade seems higher than the other, or when clothes cannot be straightened, but more often it is found during physical examination. The earliest complaint may be weakness in the lower back after long sitting or standing, followed by muscular pain in the tense area of the back, such as the lumbosacral angle. Pain is uncommon in idiopathic scoliosis during adolescence, so further examination is needed.
Scoliosis during the period of growth and development with an unclear cause is called idiopathic scoliosis. Generally, idiopathic scoliosis is divided into three types according to age characteristics: infantile type (0-3 years), juvenile type (4-9 years), and adolescent type (10-16 years). According to the anatomical position of the apex of the scoliosis, it is also divided into:
① Cervical curvature: the apex is between C1 and C6.
② Cervical-thoracic curvature: the apex is between C7 and T1.
③ Thoracic curvature: the apex is between T2 and T11.
④ Thoracolumbar curvature: the apex is between T12 and L1.
⑤ Lumbar curvature: the apex is between L2 and L4.
⑥ Lumbar sacral curvature: the apex is at L5 or S1.