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All Publications

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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Variations in Pelvic and Other Sagittal Spinal Parameters as a Function of Race in Adolescent Idiopathic Scoliosis

Lonner, Baron S. MD*; Auerbach, Joshua D. MD†; Sponseller, Paul MD‡; Rajadhyaksha, Amar D. MD*; Newton, Peter O. MD§ Study Design. A retrospective review of clinical and radiographic data from a multicenter adolescent idiopathic scoliosis (AIS) database. Objective. The purpose of this study was to perform a comprehensive radiographic evaluation…...

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Evaluation of Proximal Junctional Kyphosis in Adolescent Idiopathic Scoliosis Following Pedicle Screw, Hook, or Hybrid Instrumentation

Helgeson, Melvin D. MD*; Shah, Suken A. MD†; Newton, Peter O. MD‡; Clements, David H. III MD§; Betz, Randal R. MD¶; Marks, Michelle C. PT, MA‡; Bastrom, Tracey MA‡; The Harms Study Group Study Design. Retrospective review. Objective. To compare the incidence of and risk factors for proximal junctional kyphosis…...

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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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Dissecting the Effects of Spinal Fusion and Deformity Magnitude on Quality of Life in Patients With Adolescent Idiopathic Scoliosis

Tsutsui, Shunji MD*; Pawelek, Jeff BS*; Bastrom, Tracey MA*; Lenke, Lawrence MD†; Lowe, Thomas MD‡; Betz, Randal MD§; Clements, David MD§; Newton, Peter O. MD* Study Design. A retrospective review of scores from the Scoliosis Research Society outcomes instrument (SRS-24 questionnaire). Objective. To quantify the isolated effects of spinal fusion…...

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Grading Apical Vertebral Rotation Without a Computed Tomography Scan: A Clinically Relevant System Based on the Radiographic Appearance of Bilateral Pedicle Screws

Upasani, Vidyadhar V. MD*; Chambers, Reid C. BA†; Dalal, Ali H. BS*; Shah, Suken A. MD‡; Lehman, Ronald A. Jr MD§; Newton, Peter O. MD*† Study Design. Bench-top and retrospective analysis to assess vertebral rotation based on the appearance of bilateral pedicle screws in patients with adolescent idiopathic scoliosis (AIS).…...

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The Deformity-Flexibility Quotient Predicts Both Patient Satisfaction and Surgeon Preference in the Treatment of Lenke 1B or 1C Curves for Adolescent Idiopathic Scoliosis

Newton, Peter O. MD*†; Upasani, Vidyadhar V. MD†; Bastrom, Tracey P. MA*; Marks, Michelle C. PT, MA* Study Design. Analysis of patient and surgeon preference between selective and nonselective thoracic spinal fusions. Objective. The purpose of this study was: (1) to determine patient preference between a longer, straighter fusion versus…...

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