The Oasys System is an occipito-cervico-thoracic posterior system for spine surgery was developed to provide the surgeon with unsurpassed versatility for the treatment of pathologies of the occipitocervical junction and the posterior cervical and upper thoracic spine (occiput-T3). The modular system consists of hooks, polyaxial screws and rods as well as plates and bone screws. A variety of occiput connectors complement the product line.