Tomy Incorporated

Kiyoshi Shiga

Hajime Tamura

Masaaki Orikasa

Kozo Kawaguchi

Mikio Mottate

Kenji Nagase

Masumi Kowata

An orthodontic device () according to the invention having an orthodontic attachment () which includes an engaging portion () formed in a side portion of an archwire slot (), and an orthodontic cap () mounted on the orthodontic attachment () while covering the whole of the archwire slot () and includes an engaging/receiving portion () extending in a direction perpendicular to a mesiodistal direction of the archwire () and engageable with the engaging portion (). 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.

Orthodontic device and method for mounting and removing orthodontic cap

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.

Orthodontic appliance

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.

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Fukushima, Japan

Kiyoshi Shiga