Proteobioactives, Pty Ltd 1 article published in JoVE Medicine Ovine Lumbar Intervertebral Disc Degeneration Model Utilizing a Lateral Retroperitoneal Drill Bit Injury Kai-Zheong Lim*1, Christopher D. Daly*1,2,3, Peter Ghosh4, Graham Jenkin3, David Oehme5, Justin Cooper-White6,7, Taryn Naidoo6, Tony Goldschlager1,8 1Department of Surgery, Monash University, 2Department of Neurosurgery, Monash University, 3The Ritchie Centre, Hudson Institute of Medical Research, 4Proteobioactives, Pty Ltd, 5 Intervertebral disc degeneration is a significant contributor to back pain and a leading cause of disability worldwide. Numerous animal models of intervertebral disc degeneration exist. We demonstrate an ovine model of intervertebral disc degeneration, utilizing a drill bit, which achieves a consistent disc injury and reproducible level of disc degeneration.