Three-dimensional pelvic incidence is much higher in (thoraco)lumbar scoliosis than in controlsShow others and affiliations
2019 (English)In: European spine journal, ISSN 0940-6719, E-ISSN 1432-0932, Vol. 28, no 3, p. 544-550Article in journal (Refereed) Published
Abstract [en]
Purpose
The pelvic incidence (PI) is used to describe the sagittal spino-pelvic alignment. In previous studies, radiographs were used, leading to less accuracy in establishing the three-dimensional (3D) spino-pelvic parameters. The purpose of this study is to analyze the differences in the 3D sagittal spino-pelvic alignment in adolescent idiopathic scoliosis (AIS) subjects and non-scoliotic controls.
Methods
Thirty-seven female AIS patients that underwent preoperative supine low-dose computed tomography imaging of the spine, hips and pelvis as part of their general workup were included and compared to 44 non-scoliotic age-matched female controls. A previously validated computerized method was used to measure the PI in 3D, as the angle between the line orthogonal to the inclination of the sacral endplate and the line connecting the center of the sacral endplate with the hip axis.
Results
The PI was on average 46.8° ± 12.4° in AIS patients and 41.3° ± 11.4° in controls (p = 0.025), with a higher PI in Lenke type 5 curves (50.6° ± 16.2°) as compared to controls (p = 0.042), whereas the Lenke type 1 curves (45.9° ± 12.2°) did not differ from controls (p = 0.141).
Conclusion
Lenke type 5 curves show a significantly higher PI than controls, whereas the Lenke type 1 curves did not differ from controls. This suggests a role of pelvic morphology and spino-pelvic alignment in the pathogenesis of idiopathic scoliosis. Further longitudinal studies should explore the exact role of the PI in the initiation and progression of different AIS types.
Place, publisher, year, edition, pages
Heidelberg: Springer, 2019. Vol. 28, no 3, p. 544-550
Keywords [en]
Idiopathic scoliosis, Sagittal alignment, Pelvic incidence, Three-dimensional analysis, Computed tomography
National Category
Orthopaedics
Identifiers
URN: urn:nbn:se:liu:diva-152573DOI: 10.1007/s00586-018-5718-6ISI: 000461290800010PubMedID: 30128762Scopus ID: 2-s2.0-85051834138OAI: oai:DiVA.org:liu-152573DiVA, id: diva2:1261490
Note
Funding agencies: K2M; Alexandre Suerman Md/PhD grant; Swedish Society of Spinal surgeons
2018-11-072018-11-072020-04-30Bibliographically approved
In thesis