Preparation of nanoceramic of alumina toughened zirconia and doped with chromium oxide for use in Dentistry

• Grant number: 19/21719-0
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: February 01, 2020
• End date: July 31, 2023
• Field of knowledge: Health Sciences - Dentistry - Dental Materials
• Principal Investigator: Luis Geraldo Vaz
• Grantee: Marina Gaino Jarreta
• Host Institution: Faculdade de Odontologia (FOAr). Universidade Estadual Paulista (UNESP). Campus de Araraquara. Araraquara , SP, Brazil

Abstract

The most commonly used material for implants is titanium and there arecommercially available yttria partially stabilized zirconia ceramic implants (3Y-TZP).However, in the presence of fluid (body fluid), 3Y-TZP presents a transition from thetetragonal to the monoclinic crystalline phase, which leads to a 3-4% volume expansion,generating microcracks that may lead to fracture of the piece. Therefore, new materialsshould emerge to minimize the effect of degradation in the presence of liquid.The use of zirconia toughened alumina (ZTA) may be a technological alternativeto materials currently used to minimize the degradation effect of 3Y-TZP. The methodaims to synthesize chromium oxide doped zirconia toughened alumina which is asintering aid and increases the hardness of the material, and the mechanical propertiesand study of the present crystalline phases and microstructure by scanning materialelectron microscopy after heat treatment at 1500°C/3h.Experimental results will indicate the effect of the addition of chromium oxide onthe initial properties of ZTA, the material will present the pink which may be importantfor use as an implant since this staining is too much can be confused with gingival colormasking. the implant, thus indicating its potential use in dentistry.