Surgical cement composition
AssigneeMinnesota Mining and Manufacturing Company
InventorsHarvey L. Anderson, Ronald M. Randklev
Life of this patent
Estimating the term…
Abstract
A surgical cement comprised of a concentrated non-gelling aqueous solution of a polycarboxylic acid and an aqueous suspension of metal oxide powder which when mixed together form a plastic mass which is formable into the desired shape before it hardens. The surgical cement has particular utility for dental applications.
Claims10
A process for the preparation of a surgical cement which comprises forming a mixture of an aqueous suspension of metal oxide powder, said powder being about 30 to 60 percent by volume of said suspension, and an aqueous solution of polycarboxylic acid, said acid being about 55 to about 80 percent by weight of said solution, and wherein the weight ratio of said suspension of metal oxide powder to said aqueous polycarboxylic acid is 0.5/1 to 8/1.
A surgical cement pack comprising (a) a first paste consisting essentially of an aqueous solution of polycarboxylic acid, said acid being about 55 to 80 percent by weight of said solution, and (b) a second paste consisting essentially of an aqueous suspension of metal oxide powder, said powder being about 30 to 60 percent by volume of said suspension;
- said pack having means to prevent premature reaction between said first and second pastes;
- whereby when said second paste is mixed with said first paste, in a weight ratio of about 0.5/1 to 8/1, a plastic mass is formed which rapidly hardens as a surgical cement but which remains plastic for a time sufficient to permit forming thereof into the desired shape.
Dependencies are inferred from the claim text.