Abstract: A drill set for adjusting an implant hole for a self-tap dental screw implant fixture comprises with a diameter d2 at the point of a cutting blade equivalent to a diameter D3 of the tip end of the fixture, a diameter d1 at the back end of the blade equivalent to the maximum root diameter of a first male screw 1e or smaller, and a length l1 of the blade larger than the entire length L1 of the fixture 1, and the second drill 3 with a diameter d5 at the point of a tapered tip end cutting blade 3b equivalent to the diameter D3, and a diameter d3 at the back end of a tapered back end cutting blade 3a equivalent to the maximum root diameter of the first male screw 1e and smaller than the maximum crest diameter thereof, both the blades 3a, 3b forming two-step taper shape.

Abstract: A dental implant for a magnetic attachment comprising a fixture (1) having a cylindrical guide part (1b) larger than outer diameter of an internal thread (1a) and plural engagement recessions (1c); an abutment (2) having a supporting surface (2c), a recessed part (2d) on a center of the supporting surface, and a contact surface (2e) to be contacted with the fixture (1) and having a cylindrical part (2f) protruding to be inserted into the guide part (1b) and a through hole having plural engagement protrusions to be engaged with the engagement recessions (1c); and a keeper with screw (3) having a flange part (3a) to be contacted with the supporting surface (2c) a cylindrical part (3b) to be inserted into the recessed part (2d) and an external thread (3d) to be screwed into the internal thread (1a) with the keeper being fitly inserted into the through hole of the abutment.

Abstract: To provide a fixture of a dental implant capable of acquiring osseointegration in an early stage, keeping a quiet state by sufficient initial stability with a jawbone at the time of the placing, and contributing to improve dental implant treatment results, in the fixture of the dental implant, a cylindrical collar part 1b includes a recessed or projected polygonal formed part 1a at a center of an intraoral side end or a truncated pyramid type abutment part 1a? at the intraoral side end, a male screw 1c is provided to a top end of the outer periphery of an opposite intraoral side of the cylindrical collar part 1b, and an incomplete screw part 1f adjacent to said cylindrical collar part 1b of said male screw 1c has a root diameter smaller than a crest diameter D of a complete screw part and larger than a root diameter d of the complete screw part.

Abstract: A drill set for adjusting an implant hole for a self-tap dental screw implant fixture comprises with a diameter d2 at the point of a cutting blade equivalent to a diameter D3 Of the tip end of the fixture, a diameter d1 at the back end of the blade equivalent to the maximum root diameter of a first male screw 1e or smaller, and a length l1 of the blade larger than the entire length L1 of the fixture 1, and the second drill 3 with a diameter d5 at the point of a tapered tip end cutting blade 3b equivalent to the diameter D3, and a diameter d3 at the back end of a tapered back end cutting blade 3a equivalent to the maximum root diameter of the first male screw 1e and being smaller than the maximum crest diameter thereof, both the blades 3a, 3b forming two-step taper shape.

Abstract: A semiconductor device characterized in that: a circuit substrate of a single or multiple layer which is composed in such a manner that, bumps, which are electrically connected to connection electrodes provided on one face of a surface mount device, are arranged in the same plane arrangement as that of said connection electrodes and protruded onto one side of a sheet of metal foil, on which wiring patterns electrically connected to said bumps with each other are formed, and an insulating adhesive agent layer is made to adhere onto the one side of a sheet of metal foil having bumps, is made to adhere onto one face of the surface mount device by said insulating adhesive agent layer; and tips of the bumps respectively come into contact with the connection electrodes.

Abstract: An angled dental implant includes an implant fixture to be implanted into a hole formed in the mandible of the patient, an abutment having a truncated conical portion configured to be bolted to the fixture, a cylinder configured to engage the abutment, where the cylinder has a center line that is inclined relative to a longitudinal axis of the fixture, wherein the cylinder is fastened to the abutment with a bolt aligned with the center line of the cylinder.

Abstract: A coil packing line in which coils are packed by a plurality of operation processes is provided. The coil packing line is provided with a plurality of work stations, stationary skid mechanisms, carriage mechanisms and a plurality of reciprocating mechanisms. Each operation process has a corresponding work station. The stationary skid mechanisms are provided at each work station for supporting a coil at the work station. The carriage mechanisms are provided between each work station for removing a coil from an upstream stationary skid mechanism, supporting the coil and depositing the coil at a downstream stationary skid mechanism. The plurality of reciprocating mechanisms independently move at least one carriage mechanism back and forth between the upstream and downstream stationary skid mechanisms.

Abstract: A method for casting dental metals with a casting apparatus including a hermetically sealed casting chamber in which an arc electrode is located above, a crucible made of an electrically conductive material is positioned below the arc electrode, and a mold provided with a closed vent is disposed below the crucible, the method including by positioning a dental metal ingot on the crucible, evacuating the casting chamber to vacuum, feeding a small amount of an inert gas at such a pressure as to induce arc discharge all over the upper surface of the ingot, thereby melting the ingot placed on the crucible by arc discharge from the arc electrode, pouring the thus obtained molten metal into a mold through its inlet, and immediately feeding an additional amount of the inert gas into the casting chamber to increase its internal pressure to a level suitable for casting. Also the additional amount of the inert gas is rapidly fed into the casting chamber through a gas tank in the vicinity of the casting chamber.

Abstract: A method for casting dental metals with a casting apparatus including a melting chamber in which there are located an arc electrode above and a crucible formed of an electrically conductive material positioned below the arc electrode, and a mold chamber divided from the melting chamber by a partition wall having a through-hole at a position below the crucible and housing a mold box receiving a mold provided with an extending open vent positioned below the through-hole, the melting chamber communicating hermetically with the mold chamber through the mold, which is characterized by positioning a dental metal ingot on the crucible, vacuumizing the melting and mold chambers, feeding a small amount of an inert gas into the melting chamber at such a pressure as to induce arc discharge all over the upper surface of the ingot, thereby melting the ingot placed on the crucible by arc discharge from the arc electrode, pouring the thus obtained molten metal into the mold through its inlet, and immediately feeding an addi

Abstract: A temperature controller unit for dental agar impression materials is provided, which comprises in combination a box member having a lid disigned to be closed to shut off the outside air or prevent substantial entrance of the outside air, a heating device provided within the box member for heating the air within the box member to heat a dental agar impression material from a first heating temperature at which it is put in a complete sol state to a second heating temperature at which it remains in a sol state to take an intra-oral impression, a fan provided within the box member for circulating the air within the box member, a temperature detecting device provided within the box member for detecting the temperature of the air within the box member, a heating device controlling section provided within the box member for controlling the heating devices in receipt of a signal from the temperature detecting devices and a container holder provided within the box member for holding a plurality of containers filled t

Abstract: A portable polishing unit for dental instruments is characterized by comprising a base member; a motor mounted thereon and driven by a dry cell; a rotary grindstone assembly fixed to the motor through a grindstone rod of a round shape and including a grindstone disc positioned in opposition to the motor, having a diameter larger than that of the grindstone rod and planar on its end face; a supporting member mounted on the base member at a position adjacent to the side of the grindstone disc which does not face the motor, and having a plane face extending in parallel with the upper face of the base member and having a length larger than the diameter of the grindstone disc; and a supporting plate mounted on the base member in the vicinity of the side edge of the supporting member, the supporting plate including a groove for supporting the root of working means extending from a grip of a dental instrument.