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STUDY DESIGN Cadaveric biomechanical study and retrospective chart review. OBJECTIVE Biomechanical comparison of segmental versus nonsegmental fixation of lumbar burst fractures and clinical analysis of short-term radiographic outcomes. SUMMARY OF BACKGROUND DATA Traditional short nonsegmental posterior fixation of thoracolumbar burst fractures suffers(More)
STUDY DESIGN A morphometric analysis, using magnetic resonance imaging (MRI) studies of the lumbar spine. OBJECTIVE To identify the anatomic position of the ventral root and the retroperitoneal vessels in relation to the vertebral body in normally aligned and deformed spines. SUMMARY OF BACKGROUND DATA The lateral approach to the lumbar spine is a(More)
BACKGROUND There is an inherently difficult learning curve associated with minimally invasive surgical (MIS) approaches to spinal decompression and fusion. The association between complication rate and the learning curve remains unclear. QUESTIONS/PURPOSES We performed a systematic review for articles that evaluated the learning curves of MIS procedures(More)
The purpose of this study was to compare the passive mechanical properties and titin isoform sizes of the multifidus, longissimus, and iliocostalis muscles. Given our knowledge of each muscle's architecture and the multifidus' operating range, we hypothesized that multifidus would have higher elastic modulus with corresponding smaller titin isoforms(More)
RATIONALE AND OBJECTIVES The optimal advanced imaging method for detection and characterization of posterior tibialis tendon (PTT) tears is unclear. The purpose of this study was to investigate the utility of ultrasonography (US) and MR imaging in the detection of surgically created PTT tears in cadavers. MATERIALS AND METHODS This was a prospective(More)
UNLABELLED Fungal infections of the spine are relatively uncommon. Fungi such as Coccidioides immitis and Blastomyces dermatitidis are limited to specific geographical areas whereas cryptococcus, candida, and aspergillus are found worldwide. Candida and aspergillus are normal commensals of the body and produce disease in susceptible organisms when they gain(More)
BACKGROUND CONTEXT Vertebral compression fractures can cause deformity, pain, and disability. Kyphoplasty involves percutaneous insertion of an inflatable balloon tamp into a fractured vertebra followed by injection of polymethylmethacrylate (PMMA) bone cement. PMMA has several disadvantages such as potential thermal necrosis and monomer toxicity. Calcium(More)
BACKGROUND Muscular instability is an important risk factor for lumbar spine injury and chronic low-back pain. Although the lumbar multifidus muscle is considered an important paraspinal muscle, its design features are not completely understood. The purpose of the present study was to determine the architectural properties, in vivo sarcomere length(More)
STUDY DESIGN Controlled laboratory and cross-sectional study designs. OBJECTIVE To determine psoas major (PM) muscle architectural properties, in vivo sarcomere-length operating range, and passive mechanical properties. SUMMARY OF BACKGROUND DATA PM is an important hip flexor but its role in lumbar spine function is not fully understood. Several(More)
Major sacral resection generally is reserved for patients with malignant lesions. Because of the uncommon nature of these diseases, little is known about outcomes of surgical treatment. The current authors describe the retrospective analysis of bowel and bladder function in patients having major sacral resection at their institution during a 10-year period.(More)