Posterior transpendicular fixation system Posterior transpendicular fixation system designed to respond to the most complex situations in spinal surgery, both in traumatic and tumoral origin as well as degenerative. The system is made up by universal pedicle screws and mono or polyaxial screw heads allowing the surgeon to combine them thus reducing dramatically inventory and lowering operation costs and stock. The system is fit for 5mm and 6.3mm diameter rods alike, giving the surgeon the possibility to choose depending on the dimension and patient's demand. Also, some fit hooks can be offered to use with rods of any diameter, for sublaminar, pedicular or transverse fixations. Simple and smart surgical instrumentation to ease and shorten surgical time. This system can be combined with Radal and Crystal Systems