Avaliação das propriedades físico-químicas: tempo de endurecimento e solubilidade dos cimentos endodônticos endomethasone N e Sealer 26

Abstract

In present research, the aim was to evaluate the physicochemical properties, hardening time and solubility of Endomethasone N and Sealer 26 endodontic sealers according to the ANSI/ADA Specification number 57. Both tests were taken to a laboratory stove at a constant temperature of 37°C and 95% relative humidity. For the hardening test, 5 stainless steel molds were made, which were placed on a microscope slide and taken to the stove. A Gilmore needle was placed vertically on a horizontal surface of the material. The molds were carried to the stove after each measurement of the needle. The interval time, from the beginning of the mixing until the needle marks on the surface of the cements were no longer visible, was considered as the hardening time of each sealer tested. In the solubility test, the teflon molds were filled with sealer shutter and placed a black wire inside the material, then pressed the material between the glass slides. The set was taken to a stove. After 3 times the hardening time of the sealer, the samples were removed from the mold and weighed on a precision scale. Each sample was suspended in a plastic container with distilled water. The samples remained in the stove for 7 days, thereafter, the excess distilled water was removed with absorbent paper in a dehumidifier and then the samples were weighed again. The Endomethasone N and Sealer 26 showed differences in both hardening time and solubility, with a wide range of variation between them.