Medical instruments for use in spinal surgery, namely, trocars, cannulas, inserters, mechanical levers, curettes, dilators, retractors, and bone separators; spinal implant tools and positioners, namely, screw drivers, screw bushing positioning tools, rod reduction tools, distractors, surgical grippers and measuring gauges; measuring gauges for use in placement of spinal implants; spinal implant devices made of artificial materials, namely, stabilizing cords, screws, pedicle screws, plates, and expanders; spinal fusion devices made of artificial material, namely, rods, screws, expandable screws, plates, fusion cages, and cervical plates; spinal deformity corrective devices made of artificial material, namely, rods, screws, plates, fusion cages, and inter-vertebral disc prostheses