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Abstract：
U-shaped sacral fractures are uncommon and are mostly the consequence of a high-energy kinetic trauma. The sacrum is a crucial element for sagittal alignment in a standing position as it determines the value of the pelvic incidence, which is a fixed and unchanging parameter for a given individual. We report the case of a 21-year-old man who underwent corrective surgery for a type II U-shaped fracture of the sacrum (according to the Roy-Camille classification), associated with a S1-S2 dislocation and sacral kyphosis that modified the patient\'s pelvic incidence. At one-year follow-up, radiographic examinations revealed solid bony fusion and stable results after removal of the implants. The surgery was managed for neurological decompression, stabilization of the fracture and correction of sacral kyphosis. The restoration of the theoretical pelvic incidence depended on the estimated lumbar lordosis. The aim of this study was to highlight the particularities in the management of a sacral U-shaped fracture and their relationship with the sagittal alignment.
摘要：
U型骶骨骨折并不常见，主要是高能动力创伤的结果。骶骨是站立姿势矢状对齐的关键因素，因为它决定了骨盆发生率的值。对于给定的个体，这是一个固定不变的参数。我们报告了一名21岁男子因II型U型骶骨骨折接受矫正手术的病例（根据Roy-Camille分类），与S1-S2脱位和骶骨后凸有关，改变了患者的骨盆发病率。在一年的随访中，放射学检查显示，取出植入物后，骨融合牢固，结果稳定。手术是为了神经减压，骨折的稳定和骶骨后凸畸形的矫正。理论骨盆发病率的恢复取决于估计的腰椎前凸。这项研究的目的是强调骶骨U形骨折的治疗特殊性及其与矢状位的关系。
