In this retrospective cohort study the preoperative and postoperative X-ray parameters of patients with adult spinal deformity were measured, dividing the lumbar region into two sections to enable differentiation of the upper lumbar vertebrae angles (L1-4) from the lower lumbar vertebrae angles (L4-S) and to investigate correlations between pelvic parameters, deformity and deformity location. Preoperatively, of ASD patients with reduced total lumbar lordosis (PI-LL>20°) 87% were kyphotic in the upper lumbar vertebrae while maintaining relatively lordotic lower lumbar vertebrae. Our investigation of correlations between pelvic parameters and deformity location in ASD patients with overall lumbar lordosis (preoperative PI-LL>20°) found that 87% were kyphoscoliotic in the upper lumbar region.
"},{"@language":"ja","@value":"成人脊柱変形患者の術前・術後のX線パラメータを，腰椎前弯角を上位腰椎（L1-4）と下位腰椎（L4-S）の2つのセグメントに分けて計測し，変形と局在と骨盤パラメータとの相関を調査した．全腰椎前弯（L1-S）減少の主体は上位腰椎の後弯化にあり，下位腰椎は術前から比較的前弯位に保たれていた．腰椎後弯を主とする成人脊柱変形患者（術前 PI-LL＞20°）の腰椎前弯形態の87％は上位腰椎後弯型であった．
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