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…...
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…...
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…...
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…...
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…...
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…...
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…...
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).…...