SURGICAL, MEDICAL, DENTAL AND VETERINARY APPARATUS AND INSTRUMENTS, NAMELY, ORTHOTICS FOR FEET; ORTHOTICS FOR ELEVATING THE HEEL AND/OR ANKLE OF PATIENTS TO PREVENT HEEL AND ANKLE PRESSURE ULCERS, ORTHOTICS FOR PREVENTING POPLITEAL VEIN COMPRESSION AND/OR DEEP VEIN THROMBOSIS IN PATIENTS WITH ELEVATED FEET, ORTHOTICS FOR PROTECTING THE ACHILLES TENDON AND/OR RELIEVING PRESSURE ON THE ANKLE OF PATIENTS WITH ELEVATED FEET; SUPPORTIVE MATERIALS, NAMELY, SUPPORTS USED AS REMOVABLE PARTS OF THE AF...