Abstract: The present invention discloses a drill bit 100 comprising a plurality of cutting blade portions 131 for gradually cutting the surface and the inner wall of bones, a plurality of channels 132 for temporarily storing bone chips produced to be agglomerated by the cut bones and for discharging outside the chips, and a working portion 130 having a blocking portion for blocking further approach of the drill bit 100 after it approaches in the bones as much as the length of the plurality of cutting blade portions 131, wherein the plurality of cutting blade portions 131 and the plurality of channels 132 are alternatively formed to have equal interval in circumferential direction, and at least portion of the bone chips produced to be agglomerated in the plurality of channels 132 is located before the plurality of cutting blades 131.

Abstract: The present invention discloses a drill bit for removing implant fastening screw which comprises the hole drilling drill bit 110 for axially drilling a hole in the fastening screw which broken or damaged in an implant and the screw lifting drill bit 130 for being firmly fixed the hole of the fastening screw and for lifting the fastening screw, and a guiding socket 120 which comprises the fastening portion 121 for being firmly fastened in the upper end portion of an implant in which a broken or damaged fastening screw is remained and a guiding portion 122 for guiding the hole drilling drill bit 110 to meet the central axis of the fastening screw and the central axis of the hole drilling drill bit 110.

Abstract: A drill for sinus membrane lift includes a contact surface for coming in face contact with sinus membrane, the contact surface having a curved periphery, and a bone-maintaining area connected to the contact surface for storing and discharging drilled bone fragments. The bone-maintaining area includes a first inside wall and a second inside wall connected to the first inside wall, the first inside wall oriented in a drilling direction, and the second inside wall opposite the first inside wall. The first inside wall has a drilling surface and is formed higher than the second inside wall so that the drilling surface is exposed in the drilling direction. The front end of the head comes into face contact with the sinus membrane at a wide area to prevent the sinus membrane from being torn or damaged even if the head completely penetrates the maxilla and contacts the sinus membrane.

Abstract: A dental implant of the invention allows an immediate masticatory function just after being implanted in a bone structure, does not need a secondary operation, and can be effectively applied even in thin and short alveolar bone. The dental implant comprises a body portion to be inserted in the bone structure and a mounting portion integrally formed on the body portion, the body portion including a thin and short core, screw blades formed along an outer peripheral surface of the core in the shape of a wide and deep screw, and a connecting portion formed in the shape of a plurality of vertical holes and grooves and capable of containing bone growth factors. The mounting portion has a gum adhering portion to protect bone tissues and a post to be mounted with an abutment or a prosthesis thereon.

Abstract: The present invention discloses a dental implant which allows an immediate masticatory function just after being implanted in a bone structure, does not need a secondary operation, and can be effectively applied even in thin and short alveolar bone. The dental implant comprises a body portion to be inserted in the bone structure and a mounting portion integrally formed on an upper portion of the body portion, the body portion including a thin and short core, screw blades formed along an outer peripheral surface of the core in the shape of a wide and deep screw, and a connecting portion formed in the shape of a plurality of holes and grooves vertically passing through the circumference thereof and capable of containing bone growth factors.

Abstract: An implant fixture remover is provided which includes: a remover screw including a coupling screw portion screwed to a female screw portion of a fixture, and a separating screw portion formed to extend from one end of the coupling screw portion to the outside of the fixture and having a thread formed on the outer circumferential surface thereof; and a remover driver including a separating female screw portion into and to which the separating screw portion of the remover screw is inserted and screwed and in which a thread corresponding to the separating screw portion is formed in the inner circumferential surface thereof, a close coupling portion formed at the lower end of the separating female portion 22 and coming in frictional contact with the upper outer surface of the fixture, and a shank which extends upward from the separating female screw portion and in which a fastening tool is connected to the outer circumferential surface of one end thereof.

Abstract: A drill for sinus membrane lift includes a contact surface for coming in face contact with sinus membrane, the contact surface having a curved periphery, and a bone-maintaining area connected to the contact surface for storing and discharging drilled bone fragments. The bone-maintaining area includes a first inside wall and a second inside wall connected to the first inside wall, the first inside wall oriented in a drilling direction, and the second inside wall opposite the first inside wall. The first inside wall has a drilling surface and is formed higher than the second inside wall so that the drilling surface is exposed in the drilling direction. The front end of the head comes into face contact with the sinus membrane at a wide area to prevent the sinus membrane from being torn or damaged even if the head completely penetrates the maxilla and contacts the sinus membrane.

Abstract: A method for treating a screw-cement retained prosthesis, an abutment and an implant are disclosed. The method for treating the screw-cement retained prosthesis, which relates to an internal implant, comprises the steps of providing an abutment comprising a joining projection, repositioning the joining projection to a joining groove formed in the upper portion of a fixture, engaging the abutment to the fixture by using a screw, providing a prosthetic appliance including a screw hole, and bonding the prosthetic appliance and the abutment by interposing dental cement between the abutment and the prosthetic appliance. The present invention includes all of the advantages of screw retained prostheses and cement retained prostheses and at the same time can solve the disadvantages thereof. Using a leading inclined surface formed in the joining projection, the abutment and prosthetic appliance are easily separated from and remounted to the fixture.