Study of the physical-chemical properties of experimental cements: setting time and soluility

• Grant number: 17/08291-5
• Support type: Scholarships in Brazil - Scientific Initiation
• Effective date (Start): July 01, 2017
• Effective date (End): December 31, 2017
• Field of knowledge: Health Sciences - Dentistry - Endodontics
• Principal Investigator: Luciano Tavares Angelo Cintra
• Grantee: Jéssica Cordeiro Alves Guimarães
• Home Institution: Faculdade de Odontologia (FOA). Universidade Estadual Paulista (UNESP). Campus de Araçatuba. Araçatuba , SP, Brazil

Abstract

One of the goals of endodontics is to find the ideal material for sealing channels. This material must have all appropriate physico-chemical and biological properties, since they will be in close contact with the periapical tissues and will serve to promote the best possible sealing of the root canal system. In this context, SealAta and SealAta Plus cements are being developed to be used for conventional filling and for retrograde filling, respectively. Previous studies by our research group (Process Fapesp 2013 / 08335-1) have shown that these cements have excellent biocompatibility. In addition, in a recent study (Case Fapesp 2015 / 18626-9), some of its physicochemical properties were evaluated and considered appropriate. However, two other important properties have not yet been tested. The aim of the present study will be to evaluate the solubility and the settling time of the SealAta and SealAta Plus endodontic cements, compared to Sealapex® and Pro-Root MTA® cements. The test time and solubility test shall be based on the recommendations of ADA / ASTM standard 57. Test specimens 2 mm high and 10 mm in diameter will be filled with one of the materials (n = 10). Indenting needles weighing 113,5 g and with tip diameter 2mm will be used for the analysis of the initial prey and; Needles weighing 456g and with 1mm tip diameter for final prey analysis. For the solubility test, specimens will be made from Teflon rings of 20mm in diameter and 1,5mm in height. After the prey, the specimens will be immersed in distilled water for a period of 24 hours. The percentage of material lost during immersion of the specimens will be considered as solubility. The results will be submitted to statistical analysis using analysis of variance to two criteria and individual comparisons by Tukey test, with significance level of 5%. (AU)