Sagittal and pelvic parameters analysis in patients with adolescent idiopathic scoliosis
© Donzelli et al; licensee BioMed Central Ltd. 2012
Published: 27 January 2012
Background and purpose
Material and methods
Sagittal parameters of the spine and pelvis were analysed in lateral standing radiographs of 256 adolescents (13.7±5 years, curve range 4-57) and compared with statistically normal values (NV) in adolescents found in the literature: thoracic kyphosis TK (NV 22–66), lumbar lordosis LL (NV 24-72), pelvic incidence PI (NV 27-71), sacral slope SS (NV 25-57) and pelvic tilt PT (NV –8-16). Lateral standing radiographs were matched with anteroposterior radiograph. Patients were classified according to the entity of scoliosis curves, age, gender and risser score.
There is a weak negative correlation (0.2) between scoliosis and kyphosis. Over 20° Cobb PI increased, mainly due to an increase of the SS. In our population we had low PI and SS, but mainly in less than 20° curves than in higher scoliosis; on the contrary, PT was high in all children. Analysing curves type and decrease of SS we found that this occurs more frequently in patients with double curves (thoracic and thoracolumbar).
PI increases through life, and curves degree worsen with growth, and this influence our results. Patients with spinal deformities have a positive sagittal balance and signs of pelvic retroversion such as decreased SS. According to our data this situation occurs to patients with thoracic and thoracolumbar curves.
- Cil Akin, Yazici Muharrem, Uzumcugil Akin, Kandemir Utku, Alanay Ahmet, Alanay Yasemin, Emre Acaroglu R, Surat Adil: The evolution of sagittal segmental alignment of the spine during childhood. Spine. 2004, 30 (1): 93-100.Google Scholar
- Mac-Thiong JM, Labelle H, Berthonnaud E, Betz RR, Roussouly P: Sagittal spinopelvic balance in normal children and adolescents. Eur Spine J. 2007, 16: 227-234. 10.1007/s00586-005-0013-8.PubMed CentralView ArticlePubMedGoogle Scholar
- Vaz G, Roussouly P, Berthonnaud E, Dimnet J: Sagittal morphology and equilibrium of pelvis and spine. Eur Spine J. 2002, 11: 80-87. 10.1007/s005860000224.PubMed CentralView ArticlePubMedGoogle Scholar
- Roussouly P, Gollogly , Berthonnaud E, Dimnet J: Classification of the normal variation in the sagittal alignment of the human lumbar spine and pelvis in the standing position. Spine. 2005, 30 (3): 346-353. 10.1097/01.brs.0000152379.54463.65.View ArticlePubMedGoogle Scholar
- Roussouly P, Gollogly S, Noseda O, Berthonnaud E, Dimnet J: The vertical projection of the sum of the ground reactive forces of a standing patient is not the same as the C7 plumb line: a radiographic study of the Sagittal Alignment of 153 asymptomatic volunteers. Spine. 2006, 31 (11): E320-E325. 10.1097/01.brs.0000218263.58642.ff.View ArticlePubMedGoogle Scholar
- Mac-Thiong JM, Roussouly P, Berthonnaud E, Guigui P: Sagittal parameters of global spinal balance normative values from a prospective cohort of seven hundred nine caucasian asymptomatic adults. Spine. 2010, 35 (22): E1193-E1198. 10.1097/BRS.0b013e3181e50808.View ArticlePubMedGoogle Scholar
- Mendoza-Lattes S, Ries Z, Gao Y, Weinstein SL: Natural history of spinopelvic alignment differs from symptomatic deformity of the spine. Spine. 2010, 35 (16): E792-E798. 10.1097/BRS.0b013e3181d35ca9.View ArticlePubMedGoogle Scholar
- Schwab FJ, Smith V, Biserni M, Gamez L, Farcy JPG, Pagala M: Adult Scoliosis: a quantitative radiographic and clinical analysis. Spine. 2002, 27 (4): 387-392. 10.1097/00007632-200202150-00012.View ArticlePubMedGoogle Scholar
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