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Evaluation of a new sagittal classification system in adolescent idiopathic scoliosis

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@article{a4ad303320624e17953e73c0a4e751fc,
title = "Evaluation of a new sagittal classification system in adolescent idiopathic scoliosis",
abstract = "PURPOSE: The purpose of the present study was to validate a new spinal sagittal classification.METHODS: We retrospectively included 105 consecutive AIS patients who underwent posterior spinal fusion. Preoperative long-standing EOS radiographs were available on all patients. Patients were classified according to the four suggested sagittal patterns: type 1, 2a, 2b or 3. Several predetermined sagittal parameters were compared between the groups.RESULTS: The mean preoperative Cobb angle was 64° ± 12°, and 73% of the patients were female. Of 105 patients, 51 were type 1, 14 were type 2a, one was type 2b and 39 were type 3. The distribution of the four sagittal patterns was significantly different compared with the original publication (p < 0.05). However, the two study populations were comparable in terms of Lenke and Roussouly types (p = 0.49 and 0.47, respectively). In our study population, the sagittal groups differed significantly in terms of thoracic kyphosis, length of thoracic and lumbar curves, lumbar lordosis, thoracic slope, C7 slope, pelvic incidence and sacral slope (p < 0.05).CONCLUSION: The distribution of the four sagittal patterns varies between AIS cohorts. Type 2b was rare, which limits the clinical applicability. Contrary to the original publication, we found that the spinopelvic parameters lumbar lordosis, pelvic incidence and sacral slope were significantly different between the Abelin-Genevois types. Hence, the corrective surgical strategy may need to incorporate these spinopelvic parameters to achieve a balanced spine requiring a minimum of energy expenditure. These slides can be retrieved under Electronic Supplementary Material.",
keywords = "Adolescent idiopathic scoliosis, Classification, Hypokyphosis, Sagittal alignment, Treatment guidelines, Validation",
author = "Sidsel Fruergaard and Jain, {Mohit J} and Lorenzo Deveza and David Liu and John Heydemann and S{\o}ren Ohrt-Nissen and Casper Dragsted and Martin Gehrchen and Benny Dahl and {Texas Children{\textquoteright}s Hospital Spine Study Group}",
year = "2020",
month = apr,
doi = "10.1007/s00586-019-06241-5",
language = "English",
volume = "29",
pages = "744--753",
journal = "European Spine Journal",
issn = "0940-6719",
publisher = "Springer",
number = "4",

}

RIS

TY - JOUR

T1 - Evaluation of a new sagittal classification system in adolescent idiopathic scoliosis

AU - Fruergaard, Sidsel

AU - Jain, Mohit J

AU - Deveza, Lorenzo

AU - Liu, David

AU - Heydemann, John

AU - Ohrt-Nissen, Søren

AU - Dragsted, Casper

AU - Gehrchen, Martin

AU - Dahl, Benny

AU - Texas Children’s Hospital Spine Study Group

PY - 2020/4

Y1 - 2020/4

N2 - PURPOSE: The purpose of the present study was to validate a new spinal sagittal classification.METHODS: We retrospectively included 105 consecutive AIS patients who underwent posterior spinal fusion. Preoperative long-standing EOS radiographs were available on all patients. Patients were classified according to the four suggested sagittal patterns: type 1, 2a, 2b or 3. Several predetermined sagittal parameters were compared between the groups.RESULTS: The mean preoperative Cobb angle was 64° ± 12°, and 73% of the patients were female. Of 105 patients, 51 were type 1, 14 were type 2a, one was type 2b and 39 were type 3. The distribution of the four sagittal patterns was significantly different compared with the original publication (p < 0.05). However, the two study populations were comparable in terms of Lenke and Roussouly types (p = 0.49 and 0.47, respectively). In our study population, the sagittal groups differed significantly in terms of thoracic kyphosis, length of thoracic and lumbar curves, lumbar lordosis, thoracic slope, C7 slope, pelvic incidence and sacral slope (p < 0.05).CONCLUSION: The distribution of the four sagittal patterns varies between AIS cohorts. Type 2b was rare, which limits the clinical applicability. Contrary to the original publication, we found that the spinopelvic parameters lumbar lordosis, pelvic incidence and sacral slope were significantly different between the Abelin-Genevois types. Hence, the corrective surgical strategy may need to incorporate these spinopelvic parameters to achieve a balanced spine requiring a minimum of energy expenditure. These slides can be retrieved under Electronic Supplementary Material.

AB - PURPOSE: The purpose of the present study was to validate a new spinal sagittal classification.METHODS: We retrospectively included 105 consecutive AIS patients who underwent posterior spinal fusion. Preoperative long-standing EOS radiographs were available on all patients. Patients were classified according to the four suggested sagittal patterns: type 1, 2a, 2b or 3. Several predetermined sagittal parameters were compared between the groups.RESULTS: The mean preoperative Cobb angle was 64° ± 12°, and 73% of the patients were female. Of 105 patients, 51 were type 1, 14 were type 2a, one was type 2b and 39 were type 3. The distribution of the four sagittal patterns was significantly different compared with the original publication (p < 0.05). However, the two study populations were comparable in terms of Lenke and Roussouly types (p = 0.49 and 0.47, respectively). In our study population, the sagittal groups differed significantly in terms of thoracic kyphosis, length of thoracic and lumbar curves, lumbar lordosis, thoracic slope, C7 slope, pelvic incidence and sacral slope (p < 0.05).CONCLUSION: The distribution of the four sagittal patterns varies between AIS cohorts. Type 2b was rare, which limits the clinical applicability. Contrary to the original publication, we found that the spinopelvic parameters lumbar lordosis, pelvic incidence and sacral slope were significantly different between the Abelin-Genevois types. Hence, the corrective surgical strategy may need to incorporate these spinopelvic parameters to achieve a balanced spine requiring a minimum of energy expenditure. These slides can be retrieved under Electronic Supplementary Material.

KW - Adolescent idiopathic scoliosis

KW - Classification

KW - Hypokyphosis

KW - Sagittal alignment

KW - Treatment guidelines

KW - Validation

U2 - 10.1007/s00586-019-06241-5

DO - 10.1007/s00586-019-06241-5

M3 - Journal article

C2 - 31802239

VL - 29

SP - 744

EP - 753

JO - European Spine Journal

JF - European Spine Journal

SN - 0940-6719

IS - 4

ER -

ID: 59371855