Surgical instruments and apparatus; instruments and apparatus for dental implants, in particular screws, discs, planning guides and templates for the determination of target positions and anticipated depths of insertion of dental implants before surgery; dental apparatus and instruments for use in surgery, dental implant procedures, and dental restorations; dental apparatus and instruments, in particular, screwdrivers, torque wrenches, dental drills, screw taps, burrs, picks, impression copin...