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Surgical Outcomes Research

Multivariate Analysis of Factors Associated With Kyphosis Maintenance in Adolescent Idiopathic Scoliosis

Cho, Robert H. MD*; Yaszay, Burt MD†; Bartley, Carrie E. MA†; Bastrom, Tracey P. MA†; Newton, Peter O. MD† Study Design. Multicenter review of prospectively collected data. Objective. The purpose of this study was to evaluate the incidence of distal adding-on and associated risk factors in each of the 2…...

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Direct Vertebral Body Derotation, Thoracoplasty, or Both: Which Is Better With Respect to Inclinometer and Scoliosis Research Society-22 Scores?

Samdani, Amer F. MD; Hwang, Steven W. MD; Miyanji, Firoz MD; Lonner, Baron MD; Marks, Michelle C. MA, PT; Sponseller, Paul D. MD; Newton, Peter O. MD; Cahill, Patrick J. MD; Shufflebarger, Harry L. MD; Betz, Randal R. MD Study Design. Prospective, longitudinal cohort (nonrandomized). Objective. To compare thoracoplasty (Th),…...

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Postoperative Segmental Motion of the Unfused Spine Distal to the Fusion in 100 Patients With Adolescent Idiopathic Scoliosis

Marks, Michelle PT, MA*; Newton, Peter O. MD*,†; Petcharaporn, Maty BS*; Bastrom, Tracey P. MA*; Shah, Suken MD‡; Betz, Randal MD§; Lonner, Baron MD‖; Miyanji, Firoz MD¶ Study Design. A cross-sectional study. Objective. The purpose of this study was to assess intervertebral segmental and cumulative motion in the distal unfused…...

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Impact of Direct Vertebral Body Derotation on Rib Prominence: Are Preoperative Factors Predictive of Changes in Rib Prominence?

Hwang, Steven W. MD*; Samdani, Amer F. MD*; Lonner, Baron MD†; Miyanji, Feroz MD‡; Stanton, Paul DO*; Marks, Michelle C. PT, MA§; Bastrom, Tracey MS§; Newton, Peter O. MD§; Betz, Randal R. MD*; Cahill, Patrick J. MD* Study Design. Multicenter retrospective review of prospectively collected data. Objective. To determine the…...

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Do Discs “Open” Anteriorly With Posterior-Only Correction of Scheuermann’s Kyphosis?

Tsutsui, Shunji MD*; Pawelek, Jeff B. BS*; Bastrom, Tracey P. MA*; Shah, Suken A. MD†; Newton, Peter O. MD*,‡ Study Design. Retrospective radiographic analysis. Objective. To investigate where and to what degree the correction of Scheuermann’s kyphosis occurred in two different procedures: posterior instrumentation/fusion with an anterior release and posterior-only…...

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Selective Thoracic Fusion in Adolescent Idiopathic Scoliosis: Factors Influencing the Selection of the Optimal Lowest Instrumented Vertebra

Takahashi, Jun MD*; Newton, Peter O. MD†; Ugrinow, Valerie L. BA†; Bastrom, Tracey P. MA† Study Design. Analysis of multicenter, prospectively collected data. Objective. To determine how selection of the lowest instrumented vertebra (LIV) relative to the stable vertebra (SV) and the end vertebra (EV) effects correction of the main…...

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Bone Grafting Options in Children

Betz, Randal R. MD*; Lavelle, William F. MD†; Samdani, Amer F. MD* Study Design. Retrospective review of the literature. Objective. To review the current literature as well as recent trends in bone grafting techniques available for children. Summary of Background Data. The currently accepted gold standard in bone grafting for…...

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Preservation of Thoracic Kyphosis Is Critical to Maintain Lumbar Lordosis in the Surgical Treatment of Adolescent Idiopathic Scoliosis

Newton, Peter O. MD*†; Yaszay, Burt MD*†; Upasani, Vidyadhar V. MD*; Pawelek, Jeff B. BA†; Bastrom, Tracey P. MA†; Lenke, Lawrence G. MD‡; Lowe, Thomas MD§; Crawford, Alvin MD¶; Betz, Randal MD∥; Lonner, Baron MD**; Harms Study Group Study Design. Retrospective analysis of prospectively collected multicenter series. Objective. To evaluate…...

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Adolescent Idiopathic Scoliosis Treated With Open Instrumented Anterior Spinal Fusion: Five-Year Follow-up

Tis, John E. MD*; O’Brien, Michael F. MD†; Newton, Peter O. MD‡; Lenke, Lawrence G. MD§; Clements, David H. MD¶∥; Harms, Jürgen MD**; Betz, Randal R. MD¶ Study Design. A multicenter prospective database was queried for patients who underwent open instrumented anterior spinal fusion (OASF) for treatment of primary thoracic…...

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Correlation of Scoliosis Curve Correction With the Number and Type of Fixation Anchors

Clements, David H. MD; Betz, Randal R. MD; Newton, Peter O. MD; Rohmiller, Michael MD; Marks, Michelle C. PT, MA; Bastrom, Tracey MA Study Design. Clinical and radiologic assessment derived from a prospective multicenter data base of adolescent idiopathic scoliosis (AIS) patients. Objective. We investigated if “implant density” or the…...

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