Spondylolysis – A stress Fracture of the lower back

What are Stress Fractures?

A  stress fracture is a crack that forms in the bone. They can range from inflammation of the bone right through to a complete stress fracture which is a cortical break.Stress fractures are the result of excessive, repetitive loads on bone causing microdamage which the remodeling process fails to repair. Lumbar stress fractures are largely confined to the posterior vertebral arch especially the pedicle. Spondylolysis is the term used for a radiologically confirmed defect of the pars interarticularis (PI) which is found between the inferior and superior process of the neural arch at the junction between the laminae and pedicles. Spondylolysis is a stress fracture of the spine