DENTAL INSTRUMENTS FOR LIFTING THE SINUS MEMBRANE AND APPLYING BONE POWDER; ADJUSTABLE DOUBLE BLADE-HANDLED KNIFE FOR USE WITH CONNECTIVE TISSUE GRAFTS; DENTAL EXPLANT KITS COMPRISING TREPHINES HAVING A PLURALITY OF BLADES OF DIFFERENT SIZES FOR REMOVING IMPLANTS, DENTAL INSTRUMENTS, NAMELY, ORAL IRRIGATORS, HAND TOOLS FOR DRILLING BONE, HAND TOOLS FOR SEPARATING THE SINUS MEMBRANE FROM THE MAXILLARY BONE, AND HAND TOOLS FOR PACKING BONE; DENTAL INSTRUMENTS, NAMELY, GUIDING SYSTEMS COMPRISING...