Abstract: An orthodontic device (10) according to the invention having an orthodontic attachment (11) which includes an engaging portion (17) formed in a side portion of an archwire slot (16), and an orthodontic cap (13) mounted on the orthodontic attachment (11) while covering the whole of the archwire slot (16) and includes an engaging/receiving portion (22) extending in a direction perpendicular to a mesiodistal direction of the archwire (12) and engageable with the engaging portion (17). A method for mounting and removing an orthodontic cap which to facilitate the mounting and removing of the orthodontic cap with respect to the orthodontic attachment.

Abstract: A clip release tool with a first and second projection, for releasing a clip from a main bracket body of an orthodontic bracket while regulating movement or deformation of the clip, and a related method, and a method of attaching a clip to an orthodontic bracket main body using a clip release tool.

Abstract: An orthodontic bracket has a clip which is curved substantially in U-shape as covering at least one part of an opposite side to a base in an arch wire slot. Catching end portions which are provided at an upper end part of the clip may be caught to enable to creep under a cover portion supported by the bracket main body. The clip is formed at the upper end part thereof with a concave portion as a recess portion which enables to catch a clip release tool for releasing the clip.

Abstract: A method for a surface treatment of a substrate comprises providing a protective layer having a solubility parameter different from that of an adhesive by 1 or less on an bonding surface of a substrate before bonding the substrate with the adhesive.

Abstract: An orthodontic bracket 10 is a plastic bracket, having a base 11 directly or indirectly secured to the teeth, a bracket main body 12 furnished on the base 11 at its one side, an archwire slot 16 formed in groove shape along a mesiodistal direction with respect to the bracket main body 12 for receiving an archwire 14, and a liner 20 of U-shape in cross section provided along the archwire slot 16. This orthodontic bracket 10 is furnished with flared portions 22A, 22B at outsides of the liner 20, and the flared portions 22A, 22B are composed not to project from the surfaces 13A, 13B of the bracket main body 12.

Abstract: An orthodontic appliance comprises a base, a main body equipped on one side of the base, an archwire slot furnished to the main body, a convertible cap closing the archwire slot along the length direction, and stepwise portions provided at ends of the archwire slot for receiving ends of the convertible cap. The convertible cap is fixedly soldered with a silver soldering material containing Ag 90% or more.

Abstract: An orthodontic bracket enabling to securely maintain positive pressure of an archwire effecting to the bottom of an archwire slot even if doing the rotational control more than a determined amount. The orthodontic bracket has a base, a main body furnished on the base, an archwire slot formed in the main body, a guiding part crossing with the slot, and a band-like clip guided in the guiding part. A clip is curved in U-shape as covering at least one part of a reverse base side in the archwire slot, and a locking portion furnished at one end side in the length direction of the clip creeps under a cover portion supported by the main body. The locking claw formed in the locking portion and a covering claw formed in the cover portion get over and engage each other.

Abstract: This present invention relates to an alloy comprising Sn, at least one of Ti and Zr and at least one of Nb and Ta as the major elements. The total percentage of the Nb and Ta in the alloy material is preferably from 8 to 20 atom % and the percentage of the Sn in the alloy material is preferably from 2 to 6 atom %. The alloy material is preferably Ni-free and has shape memory characteristics or superelasticity.

Abstract: An orthodontic bracket has a front side part, a bump portion, an inner side part which are formed on a ceiling face of a guide portion in such a manner that the front side part, the bump portion, the inner side part are formed in order in a guiding direction to which a clip is guided by the guide portion. The orthodontic bracket further has a sliding-rotation supporter provided at the lower end of the clip. When the sliding-rotation supporter slides on the ceiling face and gets over the bump portion from the front side part to reach the inner side part of the ceiling face, the clip can press the archwire down toward the bottom of the archwire slot.

Abstract: An orthodontic appliance comprising a main body for orthodontic treatment and a bonding base connected to the main body and capable of adhering to the teeth, wherein the main body and the bonding base each comprise calcium phosphate crystallizing glass. The calcium phosphate crystallizing glass preferably comprises CaO 10 to 60 wt %, P2O5 25 to 85 wt %, Al2O3 5 to 25 wt % and Li2O 0.01 to 5 wt %, and has Vickers hardness Hv based on JIS Z2244 of 4.5 GPa or lower, and bending strength based on JIS R1601 of 100 MPa or higher.

Abstract: In an orthodontic appliance fit into the mouth, at least either one of an orthodontic bracket or an arch wire is composed of a composite resin. A reinforcing member is provided at a slot of the bracket and exposed to an inner wall surface of the slot. The reinforcing member is extended into tie wings which are formed as being extended toward the gingival side of the slot and towards the occlusal side. The composite resin is a resin, e.g., a polymer alloy, in which two or more kinds of resin having contrary capacities, i.e., durability and adhesiveness, are blended. Further, a thermoplastic elastomer (TPE) is dispersed into a matrix resin to accomplish the strength and the solvent crack prevention, which are difficult to consist with each other. Dispersing TPE into the matrix resin is one kind of polymer alloying, and thus obtained resin is the composite resin.

Abstract: In orthodontic element made of a bracket composed of polycrystalline ceramics, a glass liner is furnished in an archwire slot furnished in the bracket.

Abstract: In an orthodontic device, a main body (1) has an opening (1a) formed to permit detachable passage of a principal wire and a flange (2) formed in a mesiodistal direction so that the device is fixed via said extension flange (2) to an band to be fitted over the crown of molar. The width (W) of the extension flange (2) in an occluso-gingival direction is made greater than the width (B) of said main body (1) in the same direction.