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

Grant number: 19/21719-0
Support type:Scholarships in Brazil - Scientific Initiation
Effective date (Start): February 01, 2020
Effective date (End): January 31, 2022
Field of knowledge:Health Sciences - Dentistry - Dental Materials
Principal researcher:Luis Geraldo Vaz
Grantee:Marina Gaino Jarreta
Home Institution: Faculdade de Odontologia (FOAr). Universidade Estadual Paulista (UNESP). Campus de Araraquara. Araraquara , SP, Brazil


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

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