Surgical implant systems for the spinal column; pedicle screws, bone screws and bone plates; link rods, guide threads, positioning screws, retractor instruments, scrapers, expanders, cannulae, intake modules, guiding wires, dilators, drills used in trepanation, connectors and transverse connectors, all aforesaid instruments and apparatus designed to be used in spinal column surgery; endoscopes and endoscope holders; surgical instruments and tools for implanting spinal column implants; instruments for minimum invasion endoscopic surgery