A Study of Powder-Liquid V.L.C. Reline Materials. Characteristics of Before Curing.

Recently, powder-liquid V.L.C.reline materials have become popular in Japan.Jinichi Obana advocated the direct reline method in 1971.We have studied this procedure and finally developed a new direct reline material-“REBARON LC”by G.C.Corporation-which is light cured.We have performed various basic experiments and used them in clinical tests.“REBARON LC”was formerly compared with chemical-cured or one paste V.L.C.reline materials. Formerly, we didn't compare it with this powder-liquid category of materials. So, I imported some powder-liquid V.L.C.reline materials.I have used these materials and studied their characteristics, fluidity, consistency, compression set and strain in compression before light-curing.The results were as follows:1.The fluidity of powder-liquid V.L.C.reline materials, except“Light liner”, decreased each time when used.2.The consistency of“Extoral”, “astron L.C.”and“Light liner”at room temperature decreased slowly, but“REBARON LC”showed the most significant decrease in consistency.3.The consistency of all four powder-liquid V.L.C.reline materials showed rapid change within 5 minutes.4.The consistency was influenced considerably by temperature.5.The compression set of“REBARON LC”(before curing) was the smallest of other reline materials and after 17 minutes it became similar to alginate impression materials.6.Strain in compression of the higher four powder-liquid V.L.C.reline materials showed 1-3 times more than alginate impression materials.