Prefabricated thermoplastic clasp
OwnerSol Sorocainventor
Life of this patent
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Abstract
A prefabricated thermoplastic clasp from whose structure a permanent clasp is formed around teeth anchoring partial removable prosthesis and dentures without the necessity of fashioning metal clasps by the lost wax method or by plastic clasps by injection molding processes. The prefabricated clasps are easily contoured by applying heat to the area which the technician wishes to shape and bend. This allows the clasp to be a one step operation thereby omitting time consuming procedures.
Claims6
A method of using a preformed thermoplastic clasp for holding a partial prosthesis to an anchoring toth, the method comprising:
- (a) providing a thermoplastic clasp having an elongated band tapering to a smaller thickness at one end of the clasp, and
- (b) forming a plurality of parallel bars at the other end of said clasp, and
- (c) forming an angle between one of said bars, and said band, with the vertex of the angle at the junction of said one of said bars, and said band, said bars and said band lying in the same plane, and
- (d) fastening said band to a working model of said anchoring tooth by heating and contouring said band thereto, and
- (e) affixing said clasp to said partial prosthesis with a quick setting acrylic.
The method according to claim 11, further comprising curing and finishing the thermoplastic material of the clasp.
In a process for attaching a thermoplastic clasp to an anchoring tooth, and affixing a new or old partial prosthesis to the clasp so that it fits into the mouth, the improvement comprising:
- (a) shaping an elongated prefabricated thermoplastic clasp having a tail, to anchor the clasp around a crown of an anchoring tooth, and
- (b) heating and shaping an elongated part of said clasp around said crown, thus permanently shaping said part, and,
- (c) affixing said tail of said clasp to a partial prosthesis by tacking with a quick cure adhesive.
Dependencies are inferred from the claim text.