ArticleEuropean spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society2020
The influence of spinopelvic morphologies on sagittal spinal alignment: an analysis of incidence angle of inflection points.
Article in European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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Who cites it
8 citing papers in PubMed.
- Pelvic position significantly influences the segmental lumbar lordosis: a cross-sectional study in asymptomatic population.European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society · 2026Article
- The Association Between Spinopelvic Parameters and Hip Fracture Types.Geriatric orthopaedic surgery & rehabilitation · 2026Article
- Characteristics of paraspinal muscle in asymptomatic population with pelvic anteversion: correlation between bony alignment and paraspinal muscle.Journal of orthopaedic surgery and research · 2025Article
- Sagittal spinal alignment varies with an individual's race: results of the multi-ethnic alignment normative study (MEANS).Spine deformity · 2023Observational
- Machine Learning-Based Measurement of Regional and Global Spinal Parameters Using the Concept of Incidence Angle of Inflection Points.Bioengineering (Basel, Switzerland) · 2023Article
- Relationship between C2 slope with sagittal parameters and clinical function of degenerative cervical kyphosis.Journal of orthopaedic surgery and research · 2023Article
- Intelligent Evaluation of Global Spinal Alignment by a Decentralized Convolutional Neural Network.Journal of digital imaging · 2022Article
- Spinal stability analysis of lumbar interbody fusion according to pelvic type and cage angle based on simplified spinal model with various pelvic indices.Frontiers in bioengineering and biotechnology · 2022Article
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Authors and funding
8 authors.
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Abstract
purposeTo elucidate whether specific spinopelvic morphologies affect the subsequent spinal sagittal alignments and determine the alignment patterns.
methodsWhole-spine standing radiographs of 244 patients were analyzed. Sagittal alignment parameters were compared according to the three types of pelvic version: anteverted pelvis (AP), neutral pelvis, and retroverted pelvis (RP), grouped per the amount of pelvic tilt (PT) and the ratio of sacral slope to pelvic incidence (PI). Incidence angles of inflection points (IAIPs) were defined as the angle between a line from the center of the femoral heads through the midpoint of the sacral superior endplate and a line perpendicular to each L1, T1 superior endplate, C2 inferior endplate, and the C1 ring, respectively.
resultsC1 incidence equaled to the geometrical sum from the pelvis to the C1 vertebra; it also equaled the sum of the C1 slope and PT (p < 0.001). Moving from the AP group to the RP group, there were progressive increases in PT, PI, and IAIPs and decreases in LL, and SS/PI (p < 0.001). Negative correlation was observed between the pelvic anteversion and the IAIPs, and a significant positive correlation was observed between the pelvic retroversion and the IAIPs.
conclusionIAIPs are novel PI-relevant radiographic parameters reflecting the relationship between the pelvis and the spinal alignment. An anteverted pelvis requires more lumbar lordosis than pelvic incidence and aligns with low IAIPs, and a retroverted pelvis requires less lumbar lordosis than pelvic incidence and aligns with high IAIPs. These slides can be retrieved under Electronic Supplementary Material.
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