Spine May 2009 Vol 34 Iss 12

Randomized Trial
1243-1249
What Works Best for Whom?: An Exploratory, Subgroup Analysis in a Randomized, Controlled Trial on the Effectiveness of a Workplace Intervention in Low Back Pain Patients on Return to Work
Ivan A. Steenstra, PhD; Dirk L. Knol, PhD; Paulien M. Bongers, PhD; Johannes R. Anema, MD, PhD; Willem van Mechelen, MD, PhD; Henrica C. W. de Vet, PhD

1250
Point of View
Glenn Pransky, MD; Manuel Cifuentes, MD

1251-1256
A Prospective, Randomized, Blinded, Single-Site Study to Evaluate the Clinical and Radiographic Differences Between Frozen and Freeze-Dried Allograft When Used as Part of a Circumferential Anterior Lumbar Interbody Fusion Procedure
John S. Thalgott; Madilyne E. Fogarty; James M. Giuffre; Stephani D. Christenson, et al

Anatomy
1257-1263
Immunohistochemical and Histological Study of Human Uncovertebral Joints: A Preliminary Investigation
Jean-Michel Brismée, ScD, PT; Phillip S. Sizer, Jr, PhD, PT; Gregory S. Dedrick, ScD, PT; Barbara G. Sawyer, PhD; Michael P. Smith, PhD, ATC

Basic Science
1264-1271
Effect of Limited Nutrition on In Situ Intervertebral Disc Cells Under Simulated-Physiological Loading
Svenja Jünger, MSc; Benjamin Gantenbein-Ritter, PhD; Patrick Lezuo, Dipl-Ing; Mauro Alini, PhD; Stephen J. Ferguson, PhD; Keita Ito,
1272-1280
Coculture of Synovium-Derived Stem Cells and Nucleus Pulposus Cells in Serum-Free Defined Medium With Supplementation of Transforming Growth Factor-β1: A Potential Application of Tissue-Specific Stem Cells in Disc Regeneration
Song Chen, MS; Sanford E. Emery, MD, MBA; Ming Pei,

Biomechanics
1281-1286
Biomechanical Effect of Constraint in Lumbar Total Disc Replacement: A Study With Finite Element Analysis
Sang Ki Chung, MD, PhD; Young Eun Kim, PhD; Kyu-Chang Wang, MD, PhD

1287-1291
Adjacent Segment Mobility After Rigid and Semirigid Instrumentation of the Lumbar Spine
Balkan Cakir, MD; Charles Carazzo, MD; René Schmidt, MD; Thomas Mattes, MD; Heiko Reichel, MD; Wolfram Käfer, MD

Cervical Spine
1292-1295
CT Scan Study of Atlantoaxial Rotatory Mobility in Asymptomatic Adult Subjects: A Basis for Better Understanding C1–C2 Rotatory Fixation and Subluxation
Juan Eduardo Mönckeberg, PhD, MD; Carlos Villas Tomé, PhD, MD; Alfonso Matías et al

1296-1300
Use of Walking Data in Assessing Operative Results for Cervical Spondylotic Myelopathy: Long-term Follow-up and Comparison With Controls
Anoushka Singh, PhD; David Choi, FRCS(SN), PhD; Alan Crockard, FRCS, DSc

Clinical Case Series
1301-1306
Degenerative Lumbar Disc and Facet Disease in Older Adults: Prevalence and Clinical Correlates
Gregory E. Hicks, PT, PhD; Natalia Morone, MD, MSc; Debra K. Weiner, MD

1307-1314
Results of Surgical Treatment of Cervical Dumbbell Tumors: Surgical Approach and Development of an Anatomic Classification System
Liang Jiang, MD; Yang Lv, MD; Xiao Guang Liu, MD; Qing Jun Ma, MD; Feng Wei, MD; Geng Ting Dang, MD; Zhong Jun Liu, MD

Deformity
1315-1320
Posterior Multilevel Vertebral Osteotomy for Correction of Severe and Rigid Neuromuscular Scoliosis: A Preliminary Study
Seung Woo Suh, MD, PhD; Hitesh N. Modi, MS; JaeHyuk Yang, MD; Hae-Ryong Song, MD, PhD; Ki-Mo Jang, MD

Health Services Research
1321-1324
Adapted Simplified Chinese (Mainland) Version of Scoliosis Research Society-22 Questionnaire
Ming Li, MD; Chuan-Feng Wang, MM; Su-Xi Gu, MD; Shi-Sheng He, MD; Xiao-Dong Zhu, MD; Ying-Chuan Zhao, MM; Jing-Tao Zhang, MM

Surgery
1325-1329
Computer Navigation in Balloon Kyphoplasty Reduces the Intraoperative Radiation Exposure
Kaywan Izadpanah, MD; Gerhard Konrad, MD; Norbert P. Südkamp, MD; Michael Oberst, MD

Technique
1330-1335
Morphometric Analysis of the Ventral Nerve Roots and Retroperitoneal Vessels With Respect to the Minimally Invasive Lateral Approach in Normal and Deformed Spines
Gilad J. Regev, MD; Lina Chen, MD; Mallika Dhawan, BSc; Yu Po Lee, MD; Steven R. Garfin, MD; Choll W. Kim, MD, PhD

Letters to the Editor
1336
Letters
Roberto Padua, MD; Rosaria Bondi, MD; Enrico Ceccarelli, MD; Federica Alviti, MD

Anatomy
E422-E426
Transverse Foramen of the Atlas (C1) Anteriorly Unclosed: A Misknown Human Variant and Its Evolutionary Significance
Franck Billmann, MD, PhD; Jean-Marie Le Minor, MD, PhD

Biomechanics
E427-E433
A Study on the Structural Properties of the Lumbar Endplate: Histological Structure, the Effect of Bone Density, and Spinal Level
Yang Hou, MD; Zhoujing Luo, PhD

Deformity
E434-E438
Intraspinal Anomalies in Infantile Idiopathic Scoliosis: Prevalence and Role of Magnetic Resonance Imaging
Joshua M. Pahys, MD; Amer F. Samdani, MD; Randal R. Betz, MD

Technique
E439-E442
An Anatomic Study of the S2 Iliac Technique for Lumbopelvic Screw Placement
Joseph R. O’Brien, MD, MPH; Warren D. Yu, MD; Rishi Bhatnagar, MD; Paul Sponseller, MD, MBA; Khaled M. Kebaish, MD

Case Report
E443-E446
Percutaneous Endoscopic Lumbar Discectomy by Transiliac Approach: A Case Report
Gun Choi, MD, PhD; Jin-Sung Kim, MD; Pramod Lokhande, MD; Sang-Ho Lee, MD, PhD

E447-E451
Spinal Osteoblastoma Complicated With Epidural Hematoma: Two Case Reports
Bang-ping Qian, MD; Yong Qiu, MD; Zezhang Zhu, MD; Hui Chen, MD

Online Article Abstracts
A12-A13
Online Article Abstracts