William C. Horton

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STUDY DESIGN This study is a retrospective review of 752 patients with adult spinal deformity enrolled in a multicenter prospective database in 2002 and 2003. Patients with positive sagittal balance (N = 352) were further evaluated regarding radiographic parameters and health status measures, including the Scoliosis Research Society patient questionnaire,(More)
STUDY DESIGN This study is a retrospective review of the initial enrollment data from a prospective multicentered study of adult spinal deformity. OBJECTIVES The purpose of this study is to correlate radiographic measures of deformity with patient-based outcome measures in adult scoliosis. SUMMARY OF BACKGROUND DATA Prior studies of adult scoliosis have(More)
STUDY DESIGN Scoliosis patients were prospectively x-rayed in three positions with independent analysis. OBJECTIVES To determine if one positioning technique provides superior visualization of critical landmarks (C7, T2, T12, L5-S1) and to determine any position dependent variations in regional measures or sagittal balance. SUMMARY OF BACKGROUND DATA(More)
Sixty-three discs in 25 consecutive patients with nonradicular discogenic pain were studied with magnetic resonance imaging and lumbar discography. Sagittal T2 magnetic resonance imaging sequences were blindly classified according to the nuclear signal intensity and to the status of the posterior anulus. A positive discogram had to include abnormal(More)
STUDY DESIGN Prospective observational cohort study with matched and unmatched comparisons. Level II evidence. OBJECTIVE The purpose of this study is to compare results of adult symptomatic lumbar scoliosis (ASLS) patients treated nonoperatively and operatively. This is an evidence-based prospective multicenter study to answer the question of whether(More)
Anterior lumbar interbody arthrodesis is commonly performed for conditions involving infection, deformity, and instability. The purpose of this investigation was to determine the effective dose of recombinant human bone morphogenetic protein-2 (rhBMP-2) as a bone graft substitute inside a titanium threaded interbody fusion cage using a nonhuman primate(More)
STUDY DESIGN Retrospective review of a prospective, multicenter database. OBJECTIVE The purpose of this study was to assess whether elderly patients undergoing scoliosis surgery had an incidence of complications and improvement in outcome measures comparable with younger patients. SUMMARY OF BACKGROUND DATA Complications increase with age for adults(More)
STUDY DESIGN A biomechanical study of 2 fixation techniques for lumbosacral fixation. OBJECTIVE To evaluate 2 techniques, one using S1 screws combined with bicortical, bitriangulated (BCBT) S2 screws, and the other using S1 screws combined with iliac screws. SUMMARY OF BACKGROUND DATA Common to the 2 techniques of sacral-pelvic fixation is S1 pedicle(More)
The bone-screw interface is critical in the use of spinal instrumentation. The purpose of these experiments described here was twofold. First, to determine whether a correlation existed between torque generated during screw insertion and the pullout strength. Second, to determine how differing surgical methods of screw hole preparation influenced torque of(More)
OBJECTIVE The purpose of this study was to assess whether back pain is improved with surgical treatment compared with nonoperative management in adults with scoliosis. METHODS This is a retrospective review of a prospective, multicentered database of adults with spinal deformity. At the time of enrollment and follow-up, patients completed standardized(More)