Biomechanical comparison of anterior screw fixation techniques for type II odontoid fractures [Elektronische Ressource] : One- versus two-screw fixation / Gang Feng

From the Department of Trauma and Orthopaedics University of Lübeck Director: Prof. Dr. med. Christian Jürgens And the Department of Anatomy University of Lübeck Director: Prof. Dr. med. Jürgen Westermann _________________________________________________________________________ Biomechanical Comparison of Anterior Screw Fixation Techniques for Type Ⅱ Odontoid Fractures: One- Versus Two-Screw Fixation Thesis for the acquisition of doctorate at the University of Lübeck - Medical Faculty - presented by Gang Feng from Heilongjiang, China Lübeck 2010 1. Berichterstatter: Priv.-Doz. Dr. med. Arndt-Peter Schulz 2. Berichterstatter: Priv.-Doz. Dr. med. Jan Philipp Benthien Tag der mündlichen Prüfung: 6.9. 2011 zum Druck genehmigt. Lübeck, den 6.9. 2011 - 2 -Table of contents Abbreviations ………………………………………………….……… 6 I. Introduction ……………………………………..………….……… 7 1.1 Incidence of Odontoid Fractures ………………………………………………….. 7 1.2 Anatomy of the craniovertebral junction …………………………….……………. 7 1.3 Fracture Classification of Odontoid Fractures ...………………………………….. 9 1.4 Pathology and Pathophysiology of Odontoid Fractures ……..…………………… 10 1.5 Treatment Options for Odontoid Fractures …………..…………………………. 11 1.6 Indications and Contraindications for Anterior Screw Fixation …………………. 14 1.6.1 Indications 14 1.6.