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The subsequent L5-S1 disc degeneration associated with long fusion arthrodesis terminating at L5 in patients with adult scoliosis has been a common concern. However, few studies paid attention to its preoperative predictors, especially in spinopelvic parameters.
The purpose of the present study was to clarify the preoperative predictors of subsequent L5-S1 disc degeneration after long fusion arthrodesis terminating at L5 in patients with adult scoliosis on spinopelvic parameters. In this retrospective study, we enrolled 67 patients with adult scoliosis, and the patients were divided into disc degeneration group DD and no disc degeneration group NDD , based on the presence or absence of subsequent L5-S1 disc degeneration.
The status of L5-S1 disc was evaluated by a modified version of radiographic classification. Characteristics and spinopelvic parameters of preoperative patients were collected as potential predictors for subsequent lumbosacral disc degeneration after long fusion arthrodesis terminating at L5 in patients with adult scoliosis.
Thirty-six patients The prevalence of the subsequent L5-S1 disc degeneration after long fusion arthrodesis terminating at L5 in patients with adult scoliosis was More attention should be paid to prevent the L5-S1 disc from degeneration when these preoperative predictors exist, especially with two or more.
Although long fusion arthrodesis for adult scoliosis revealed satisfactory clinical outcomes including spinal reconstruction and symptom relief of obstinacy low-back pain, radicular pain, and intermittent claudication, the distal fixed vertebrae terminating at L5 or sacrum has remained controversial [ 2 , 3 , 4 ]. The distal fusion segment extending to the sacrum is undisputed for patients with adult scoliosis with presented severe lumbosacral disc degeneration, instability of lumbosacral segment, L5 spondylolysis, and nerve compression at L5-S1 needing decompression [ 4 ].