Composite denture combining soft polyurethane and hard polymer c

Details Composite denture combining soft polyurethane and hard polymer c Composite denture combining soft polyurethane and hard polymer c

1981-03-31

1982-11-23

Hayes, Lorenzo B.

Dentistry

Prosthodontics

Denture base construction

433171, 433201, A61C 1300

Patent

active

043603440

ABSTRACT:
An artificial denture of composite construction is provided which comprises a tooth-holding portion fabricated from a hard non-polyurethane polymer having a hardness of not less than about Shore D40 integrally chemically bonded to a mouth-engaging portion fabricated from a soft non-hydrophilic polyurethane elastomer having a hardness of not greater than about Shore A65, said polyurethane being the reaction product of a polyether polyol and an aliphatic, cycloaliphatic or aralkyl di- or polyisocyanate in which the isocyanate groups are directly bonded to the aliphatic, cycloaliphatic or alkyl moieties thereof.

REFERENCES:
patent: 3251910 (1966-05-01), Barnhart
patent: 3258509 (1966-06-01), Barnhart
patent: 3659344 (1972-05-01), Gavazzi
patent: 4024636 (1977-05-01), Colpitts et al.
patent: 4024637 (1977-05-01), Colpitts et al.
patent: 4080412 (1978-03-01), Colpitts et al.
patent: 4225696 (1980-09-01), Colpitts et al.

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