| 摘要 |
A biologically compatible non-toxic composition which when mixed, is useful as an in situ curing endodonic filling material. The composition has two separately packaged components. One component is a paste which contains a low viscosity hydroxy terminated polydialkylsiloxane and a non-reactive silicone oil diluent having a viscosity of from about 20 to 20,000 centistrokes at 25 DEG C. and comprising a polydialkylsiloxane. The other component is a liquid which includes (i) the reaction product resulting from the refluxing at ambient pressure and a temperature of about 150 DEG to about 175 DEG C. under a nitrogen blanket in the absence of air and moisture a dialkyltindicarboxylate in which the alkyl groups have from 1 to about 8 carbon atoms and the carboxylate groups contain from about 10 to about 18 carbon atoms and a tetraalkyl orthosilicate, in the molar ratio of 1 to 3; (ii) uncombined alkyl orthosilicate and (iii) a non-reactive silicone oil diluent having a viscosity of from 20 to 120,000 centistrokes at 25 DEG C. and comprising a polydialkylsiloxane. The method of treating a root canal in need of endodontic filling which comprises the steps of forming a mixture by thoroughly mixing, with each 1.5 grams a paste component, 5 to 6 drops of the liquid component. The resulting mixture is injected by syringe or hypodermic needle into an endodontically prepared root canal and allowed to stand for about thirty minutes and harden in situ to form a flexible soft non-toxic filling material which conforms to the shape of the root canal cavity.
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