Process for preparing a cast metal surface structure for bonding

Details Process for preparing a cast metal surface structure for bonding Process for preparing a cast metal surface structure for bonding

1983-11-28

1985-11-12

Lusignan, Michael R.

Coating processes

Medical or dental purpose product; parts; subcombinations;...

Particulate or unit-dosage-article base

106 35, 264 17, 433191, 4332001, 433206, 433208, A01N 102, C09K 300, A61C 1322

Patent

active

045527792

ABSTRACT:
A process for preparing a cast metal surface such that it is usable for bonding to a tooth structure. A water soluble adhesive medium is placed on a stone cast of a tooth or teeth. A mixture of soluble and non-soluble particles are then placed onto the adhesive. The soluble particles partially dissolve into the adhesive medium while the non-soluble particles adhere to the adhesive. Wax or resin is flowed over the resultant surface to imbed the particles therein. The desired tooth form is then completed after which the adhesive is dissolved away to release the pattern from the cast. The remaining soluble particles are then washed away leaving voids in the surface of the pattern. These voids are then duplicated using standard lost wax casting procedures to reproduce the surface in metal. The surface, which has a multiplicity of voids, roughnesses, and undercuts, is then filled with a bonding medium to attach the rigid cast metal appliance to a tooth surface.

REFERENCES:
patent: 3578493 (1971-05-01), Smith
patent: 4172323 (1979-10-01), Orlowski
patent: 4269595 (1981-05-01), Nemethy
patent: 4369033 (1983-01-01), Webb et al.

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