Spondylolysis is the defect between joints of vertebrae and characterized by pain. Main cause of Spondylolysis is stress or constant over stretching of spine. This defect can lead to stress fractures (breaks) in the vertebrae that can weaken the bones so much that one slips out of place, a condition called spondylolisthesis. Treatment of Spondylolysis includes medication, physical therapy, exercise or collar and back supports may be used. Therapies will help to increase pain-free movement, improve flexibility and muscle strength. Provides excellent total neck comfort. Offers trachea opening ideal for degenerative disorders, immobilization after trauma, surgery and all other similar conditions. Flamingo Cervical Orthosis (Philadelphia Collar) gives you a great relief.