Abstract: Stable cyanoacrylate adhesive compositions having viscosities greater than about 200 centipoise are prepared by incorporating therein, as a thickening agent, a soluble acrylic polymer having a reduced viscosity of about 5 or greater, and a content of free radical polymerization initiator less than 1% by weight. These properties are obtained by subjecting the thickening agent to temperatures of about 140.degree.-180.degree. C. for about 30-180 minutes prior to incorporating it in the cyanoacrylate.

Abstract: A process for repairing dental caries which comprises:A. Removing decayed tooth structure to form a dental cavity;B. Filling said cavity with a dental filling composition comprising1. A free-radical polymerizable acrylate monomer;2. A free radical polymerization initiator; and3. An inorganic filler;C. Applying an aqueous solution of waterglass to the surface of the composition and allowing the water to evaporate to leave a solid, essentially oxygen-impermeable coating of waterglass;D. Permitting said composition to harden to form a restored dental surface; andE. Washing off the waterglass coating with water.