Medical and surgical apparatus and instruments, namely, surgical implants composed of artificial, non-porous materials for the treatment of diseases of the spine; vertebral discectomy apparatus and instruments, composed of artificial, non-porous materials; solid metal, non-porous vertebral orthopedic apparatus and instruments; orthopedic fixation devices used in vertebral implant surgery, composed of non-porous, artificial materials; pedicle screws and connecting rods used in vertebral surgery, composed of non-porous materials; surgical interbody spacers, cages, and associated instruments, namely, surgical cutters for implant site preparation, implant trials for verifying a fit between the surgical site size and the implant size, and implant holders and insertion tools for holding and inserting the implant into the site, all composed of non-porous artificial materials