Dentistry – Prosthodontics – Holding or positioning denture in mouth
Patent
1990-07-16
1991-12-24
Mancene, Gene
Dentistry
Prosthodontics
Holding or positioning denture in mouth
433181, 291606, A61C 1312
Patent
active
050747916
ABSTRACT:
A method for constructing a dental bridge using a prefabricated pontic, comprising positioning the pontic between metal retainers placed on a die formed from an impression of the abutment teeth to be restored, with the pontic having an arm with a free end extending approximate each metal retainer. The pontic and metal retainers are invested with refractory investment for forming a soldering model. A dental material composed of high- and low-fusing temperature metal particles form a porous structure defining an interproximal joint between the free end of each pontic and the corresponding retainer. A dental solder is added over the dental material and the model is heat treated to a first temperature above the melting temperature of the low-fusing temperature metal particles in the dental material. The temperature is then raised to melt the dental solder which fills the voids in the porous structure to form a solid joint between the pontic and each retainer of superior strength.
REFERENCES:
patent: 4704089 (1987-11-01), Shoher et al.
patent: 4957439 (1990-09-01), Shoher et al.
Shoher Itzhak
Whiteman Aharon E.
Lepiane Adriene B.
Mancene Gene
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