MEDICAL AND SURGICAL DEVICES AND INSTRUMENTS, NAMELY, HAND-HELD, POWER-DRIVEN ROTARY KNIVES, DERMATOMES, USED IN CONNECTION WITH MEDICAL AND SURGICAL PROCEDURES AND TISSUE AND/OR BONE RECOVERY PROCEDURES, NAMELY, TISSUE REMOVAL INCLUDING CUTTING AND/OR TRIMMING OF SKIN TISSUE, CONNECTIVE TISSUE, SUCH AS LIGAMENTS, TENDONS AND CARTILAGE, AND/OR BONES, ADIPOSE DEBRIDING, WOUND DEBRIDING, AND TISSUE AND/OR BONE RECOVERY; AND REPLACEMENT PARTS FOR THE AFORESAID DEVICES AND INSTRUMENTS