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Influence of gastric juice on surface properties of ceramic materials used for CAD/CAM monolithic restorations

Grant number: 16/09628-0
Support Opportunities:Scholarships in Brazil - Scientific Initiation
Effective date (Start): December 01, 2016
Effective date (End): May 31, 2018
Field of knowledge:Health Sciences - Dentistry - Dental Materials
Principal Investigator:Renata Garcia Fonseca
Grantee:Marlon Eduardo Menezes da Cruz
Host Institution: Faculdade de Odontologia (FOAr). Universidade Estadual Paulista (UNESP). Campus de Araraquara. Araraquara , SP, Brazil


The advance in the use of ceramic materials for monolithic restorations obtained via CAD/CAM stimulated the investigation of their mechanical properties towards different challenges. However, little is known about how the surface of these materials behave towards the action of acidic substances from extrinsic (diet) and intrinsic (gastric juice) factors. Thus, the aim of this study is to evaluate the effect of the gastric juice on roughness, hardness, loss of substance and color stability of new restorative materials. Forty-eight discs will be obtained from the following monolithic ceramic materials: Vita Suprinity and IPS e-max CAD, which will be initially (Reading 1) submitted to roughness analysis (n=12), weighing of the specimens (n=12), color stability (n=12) and hardness (n=12). After that, they will be divided into two groups according to the following treatments: 1) storage in artificial saliva (control) (n=6) and 2) erosion by hydrochloric acid (n=6), corresponding to 1 year. Then, specimens will be submitted again to the same analyses (Reading 2) in order to detect changes that they may have suffered. After Reading 2, the specimens obtained for color stability analysis will be immersed in coffee 2x/day for 30 days and a third Reading will be performed. In addition, 2 discs of each material will be analyzed in SEM, before and after exposures. The results will be submitted to statistical analysis based on previous analysis of normality and homoscedasticity. (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
CRUZ, MARLON E. M.; SIMOES, RAFAELA; MARTINS, SAMIRA B.; TRINDADE, FLAVIA Z.; DOVIGO, LIVIA N.; FONSECA, RENATA G.. Influence of simulated gastric juice on surface characteristics of CAD-CAM monolithic materials. JOURNAL OF PROSTHETIC DENTISTRY, v. 123, n. 3, p. 483-490, . (16/09628-0)

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