Abstract: An orthodontic supporting structure of the present invention comprises an implant unit which is implantable in a jaw bone and a connecting unit which includes an arm part having a fastening portion. The implant unit has a narrow part in its upper portion. The connecting unit further includes an engaging part having an opening at one end. The engaging part fits on the narrow part of the implant unit. The connecting unit can be attached to the implant unit in a simple way by sliding the engaging part along the narrow part and then crimping far ends of the engaging part.

Abstract: An orthodontic supporting structure of the present invention comprises an implant unit (21) which is implanted in a jaw bone and a connecting unit (22) which includes an arm part (14) having a fastening portion (15). The implant unit (21) has a narrow part (18) in its upper portion (17). The connecting unit (22) further includes an engaging part (26) having an opening (16a) at one end. The engaging part (26) can fit on the narrow part (18) of the implant unit (21). The connecting unit (22) can be attached to the implant unit (21) in a simple way by just sliding the engaging part (26) along the narrow part (18) and then crimping far ends (26b) of the engaging part (26).

Abstract: An orthodontic appliance of the present invention has a combination of a bracket with a hook and a bracket without a hook.The bracket with a hook includes a metal body formed with a groove therein adapted for being engaged with an arch wire and provided with a hook thereon, the hook is integrally formed with the metal body; and a synthetic resin housing for accommodating the metal body therein such that inner surface of the groove is exposed and at least top portion of the hook projects from the synthetic resin housing. The bracket without a hook includes a metal body formed with a groove therein adapted for being engaged with an arch wire; and a synthetic resin housing for accommodating the metal body therein such that inner surface of the groove is exposed.

Abstract: An orthodontic appliance of the present invention has a combination of a bracket with a hook and a bracket without a hook. The bracket with a hook includes a metal body formed with a groove therein adapted for being engaged with an arch wire and provided with a hook thereon, the hook is integrally formed with the metal body; and a synthetic resin housing for accommodating the metal body therein such that inner surface of the groove is exposed and at least top portion of the hook projects from the synthetic resin housing. The bracket without a hook includes a metal body formed with a groove therein adapted for being engaged with an arch wire; and a synthetic resin housing for accommodating the metal body therein such that inner surface of the groove is exposed.

Abstract: A practically non-aqueous dental cement composition is disclosed and the dental cement composition comprises a polymer or co-polymer having an .alpha.,.beta.-unsaturated carboxylic acid as an essential component of a main monomer; and an inorganic powder capable of forming a metal chelate in the presence of water characterized in that the polymer or co-polymer exists as a solution in a polymerizable monomer that can dissolve the polymer or co-polymer. This provides a dental composition which has not only the advantages of the conventional glass ionomer cement but also a higher setting rate and more desirable physical properties of the setting product and is excellent also in durability, by eliminating the disadvantages in the setting rate and physical properties of the set cement.

Abstract: A working model for a lower jaw is disposed on the bottom of an articulator, a pair of support rods are disposed on both sides of the articulator so as to extend upward from the bottom of the articulator, a pair of joint portions are provided on top of the paired supprt rods to support both end portions of a shaft, a working model for an upper jaw is mounted to that shaft to permit movement of the upper working model relative to the lower working model, a pair of side pins are disposed at upper, right and left, outside positions of artificial teeth mounted into the articulator, and a tooth aligning device is mounted to the side pins. Further, a center pin is mounted along the midline of the articulator, and holding portions for mouting the tooth aligning device are formed on the support rods and the center pin.

Abstract: A device which allows easy observation of discrepancies between the upper and lower jaw comprises an upper bow (100) and a lower bow (200) which separately hold in place an upper jaw model (UM) and a lower jaw model (LM) prepared based on impressions and position these upper and lower jaw models (UM) and (LM) opposite to each other, checker pins (310) in the upper bow (200) which are positioned at a location corresponding to the opening/closing axis of the upper jaw model (UM) and lower jaw model (LM) and along the opening/closing axis, and checker plates (300) in the upper bow (100) positioned in such a manner that their outer surfaces (306) are perpendicular to the opening/closing axis and adjacent to the tips of the checker pins (310).

Abstract: The present invention provides a supporting body for use in an orthodontic appliance capable of applying a force to the tooth to be treated from the most preferable position. The supporting body includes an implant member having a maximum dimension across the thereof cross section of 2 mm or less for being implanted in a jaw bone (i.e. the maxilla and/or mandibula), and an exposed member forming one end of the supporting body to be exposed to inside of mouth. The exposed portion includes an extended arm and the arm is formed with a hook.

Abstract: A working model for a lower jaw is disposed on the bottom of an articulator, a pair of support rods are disposed on both sides of the articulator so as to extend upward from the bottom of the articulator, a pair of joint portions are provided on top of the paired support rods to support both end portions of a shaft, a working model for an upper jaw is mounted to that shaft to permit movement of the upper working model relative to the lower working model, a pair of side pins are disposed at upper, right and left, outside positions of artificial teeth mounted into the articulator, and a tooth aligning device is mounted to the side pins. Further, a center pin is mounted along the midline of the articulator, and holding portions for mounting the tooth aligning device are formed on the support rods and the center pin.

Abstract: An orthodontic appliance includes a configuration which makes it difficult for dental plaque to be deposited thereon and which prevents lateral movement of an arch wire as well as precisely preforming a torque shift without an auxiliary attachment wire. The orthodontic appliance is used in dental treatment includes a bracket having an arch wire passage formed therein to extend substantially horizontally and a lock pin insertion passage for insertion of a lock pin therethrough, the lock pin being substantially vertically oriented between the surface of a tooth and the arch wire passage for pressing the arch wire toward a side further from the tooth surface to thereby position the arch wire. The lock pin insertion passage has a bow-shape jetting toward the tooth surface and the lock pin is bow-shaped such that the following mathematical expression is satisfied:R.sub.P .ltoreq.R.sub.Lwherein R.sub.P is a radius of curvature of the lock pin insertion passage and R.sub.

Abstract: Medical or dental hardening compositions of the present invention comprise calcium phosphate type devitrification glass-ceramics powder containing apatite and/or calcium phosphate ceramics and a liquid component. The second medical or dental hardening compositions of the present invention comprise strontium phosphate type devitrification glass-ceramics powder containing strontium-apatite crystals and/or calcium strontium phosphate ceramics, or calcium strontium phosphate type devitrification glass-ceramics powder and a liquid component.

Abstract: A dental cement having a composition consisting essentially of a hardening liquid, a hardening accelerator, wherein the hardening liquid consists essentially of carboxyl-modified silicone oil.

Abstract: Antibiotic alloys adapted for making sanitary articles, such as orthodontic fittings and component parts of water purifying apparatus, the alloy containing cobalt to impart an antibiotic ability hereto, and iron and nickel to enhance the workability thereof so that the alloy can be easily worked into intricate shapes.

Abstract: An anaerobic germiculture receptacle comprises a first receptacle and a second receptacle accommodated in the first receptacle; a sealing plug securing the seal against the first receptacle, the sealing plug including a bore in which the second receptacle is held; and a pushing rod insertable in the bore so as to push the second receptacle down, wherein all operation is safely carried out without breaking the air-tight arrangement.

Abstract: A dental material having X-ray contrastability which is excellent in strength, aesthetic appearance, workability, marginal blocking and the like and possesses high value in use can be provided by using a methacrylate having an aromatic hydrocarbon substituted by bromine in the molecule as polymerizable monomer and, as occasion demands, combining a filler and/or hardener suitably selected with this compound.

Abstract: A tooth articulator for use in correcting tooth occlusal disharmony or interference, the articulator keeping the mouth hygienic irrespective of a long period of use in the mouth by utilizing the antibiotic power of the cobalt coating wholly or partly covering the surface of the base material of the articulator.

Abstract: A root canal post for use in constructing a therapeutic foundation on the root tooth for treatment of a broken tooth, the post comprising a head, a shank and a bore axially produced through the head and shank, the bore including a filler releasably filled therein so that after the post is anchored in the tooth, a subsequent treatment for a possible secondary cavities is applied through the bore which is made empty by removing the filler.

Abstract: Powder of chemical material for impression taking and molding for teeth is previously packed with a water-soluble film in an amount determined by each clinical treatment. A desired impression taking or molding material is obtained by putting such pack or packs in a proper amount of water and properly kneading them.

Abstract: An improved device for measuring an inclination angle of the tapered surface of a plaster die duplicated from the prepared tooth in the field of restorative dentistry is disclosed. The device is used also for scraping operation for the was pattern. It includes a turnable tool holding plate which is turnably held in a slot formed on the lower part of a core so as to turn about a support shaft. A rotary ring with its lower end face cut to a predetermined inclination angle, for instance, 7 degrees is rotatably fitted onto the core in such a manner that the lower inclined face comes in contact with the upper faces of wing-shaped lateral projections of the tool holding plate with a transversely extending shaft disposed therebetween. The transversely extending shaft is inserted through the tool holding plate at the same inclination angle as that of the lower inclined end face of the rotary ring so that its axis intersects with the axis of the support shaft.