WSI-MX/PX-Titan is a universal, trans-pedicular screw system for mono and multi-stabilizaton of segmental thoracic and lumbo-sacral deformities and defects and stands out because of the following characteristics: Simplification of handling of instrumentation due to functional and secure implants, universal uniform screw connections of all implant components, excellent anchorage stability of the implants, low profile of implant due to the avoidance of outer rings, sleeves or nuts, best results with competitors in all the required biomechanical test categories, corset-free follow-up treatment and high medical outcome quality due to simple, fast and most importantly safe spine operations under equal consideration of medical and economic viewpoints.