Dental remedy for vital pulp covering and root canal filling, and preparation method therefor

Claim 1

A method for preparing a dental remedy for vital pulp covering and root canal filling, which method comprises the steps of: A. reacting at about 90° C formaldehyde or paraformaldehyde with at least one phenol compound selected from the group consisting of guaiacol, creosote, cresol, eugenol and resorcinol and an alcohol-soluble vegetable oil or the interesterification product of a vegetable oil and a polyhydric alcohol which is at least one member selected from the group consisting of glycerol, polyethylene glycol and propylene glycol in the presence of the catalyst of one or more of bi- or tri-functional organic acids and catalyst promotor of one or more of organic acids other than said organic acids, inorganic acids and their salts; B. then stopping said reaction when a viscous intermediate condensate is produced; C. cooling the reaction product, whereby an oily material separates therefrom; D. collecting the oil material; E. rinsing said oily material with water to refine; F. drying said refined oily material; and G. kneading into a paste said dried oily material with an active calcium agent immediately before use wherein said active calcium agent is the material which is prepared by calcining calcium hydroxide solely or a mixture of calcium hydroxide and one or more body absorable X-ray contrast media, said calcium hydroxide being converted into calcium oxide through said calcination.

Claim 2

A method for preparing a dental remedy for vital pulp covering and root canal filling, which method comprises the steps of: A. reacting at about 90° C formaldehyde or paraformaldehyde with at least one phenol compound selected from the group consisting of guaiacol, creosote, cresol, eugenol and resorcinol and an alcohol-soluble vegetable oil or the interesterification product of a vegetable oil and a polyhydric alcohol which is at least one member selected from the group consisting of glycerol, polyethylene glycol and propylene glycol in the presence of the catalyst of one or more of bi- or tri-functional organic acids and catalyst promotor of one or more of organic acids other than said organic acids, inorganic acids and their salts; B. then stopping said reaction when a viscous intermediate condensate is produced; C. cooling the reaction product, whereby an oily material separates therefrom; D. collecting the oil material; E. rinsing said oily material with water to refine; F. drying said refined oily material; and G. kneading into a paste said dried oily material with an active calcium agent immediately before use wherein said active calcium agent is the material which is prepared by calcining calcium hydroxide solely or a mixture of calcium hydroxide and one or more body absorable X-ray contrast media, said calcium hydroxide being converted into calcium oxide through said calcination.