Medical equipment, namely, orthodontic patient treatment chairs, orthodontic patient treatment chairs combined with adjustable cabinets and sold as a unit, orthodontic patient treatment chairs combined with computers and sold as a unit, orthodontic operation storage units for use with orthodontic patient treatment chairs; medical equipment in the nature of orthodontic operatory delivery units and structural parts therefor, namely, storage drawers, attachments, articulating arms, wheels, brackets, trays, doors, and electrical power outlets, all for use in connection with orthodontic patient treatment chairs; medical equipment specially adapted for use with orthodontic patient treatment chairs, namely, cabinets, drawers, countertops, computer trays, computer keyboard trays, wheels, and casters; medical equipment specially adapted for use with orthodontic patient treatment chairs, namely, chair bases, electric chair bases, chair head rests, chair upholstery, chair armrests, tables, foot switches, hoses, glide brackets, post-mounted orthodontic operatory lights, articulating arms with trays, pivot units and plumbing connections; medical procedure chairs; orthodontic instruments, namely, cephalometric tracing templates, and abrasive heads for interproximal reduction