Physical Capability Outcomes After Single-Level PD-L vs Single-Level ALIF: a Multi-Center Clinical Trial

Inclusion Criteria

• •Eligible patients will meet the following criteria based on clinically appropriate criteria per standard of care at individual institutions which may include but are not limited to
• •skeletally mature; BMI \< 40
• •suffered from low-back pain with or without leg pain for 6 months or longer
• •no evidence of spinal deformity on plain radiograph
• •no evidence of angular instability on flexion extension radiographs
• •severe and incapacitating low-back pain, defined as a score of 40% or greater on the Oswestry Disability Questionnaire
• •a single level of degenerative disc disease at L34, L45, or L5-S1 on magnetic resonance imaging (MRI) scan
• •discography, if indicated, reproduces pain at the level of degeneration noted on the MRI scan and is negative for pain reproduction at adjacent levels
• •bone mineral density T-Score by DEXA Scan \>-1.0 for any skeletal region
• •computed tomographic (CT) scan demonstrates the absence of pars defect at the index level
• •CT scan demonstrates the absence of significant facet arthropathy at the index level
• •considered reasonable candidates for surgery in regard to psychological factors as determined according to the standard of care at each participating center