Dental instruments for lifting the sinus membrane and applying bone powder, adjustable double blade handle for 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 blades, pins and a blade handle to be used when placing implants; dental instruments, namely, guiding systems comprised of dental hand piece, drill, direction indication unit, namely, a laser guider to be used to ensure correct implant location of surgical implants; dental instruments, namely, guiding systems comprised of dental hand piece, drill, direction indication unit, namely, a laser guider to determine optical implant diameter during placement of surgical implants; dental hand pieces, namely, dental burrs, dental ultrasonic hand pieces, optical scanning appliances for medical and dental use; x-ray appliances for dental and medical use; sprayers for cleaning gums and teeth used in dentists' offices during dental procedures; dental implants; artificial teeth; dentures; dental implant components, namely, analogs, dental implant screws, and implant abutments; dental crowns; dental bridges; braces for teeth