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Study of the variation in thermal conductivity of the acrylic resin with the incorporation of silica and silver particles: use of a wireless temperature sensor

Grant number: 18/14231-8
Support type:Scholarships in Brazil - Scientific Initiation
Effective date (Start): June 01, 2019
Effective date (End): May 31, 2020
Field of knowledge:Health Sciences - Dentistry - Dental Materials
Principal Investigator:Tarcisio Jose de Arruda Paes Junior
Grantee:Juliana de Freitas Gouveia Silva
Home Institution: Instituto de Ciência e Tecnologia (ICT). Universidade Estadual Paulista (UNESP). Campus de São José dos Campos. São José dos Campos , SP, Brazil


Polymethylmethacrylate (PMMA) is widely used in prostheses as a base material. It has always been a well-accepted and widely used material in dentistry in the laboratory and clinical area, due to its excellent advantages such as high dimensional stability, low cost, sufficient working time and its biocompatibility. However, like all material, it has several disadvantages, including its low thermal conductivity. The low thermal conductivity of acrylic resins affects patient acceptance and comfort, causing problems in their daily use, but the proportion of this discomfort has never been measured scientifically. This work aims to measure the thermal conductivity of the acrylic resin using a wireless device in the shape of a metallic insert, also the conductivity of the resin will be measured with the incorporation of silica particles and silver nanoparticles, seeking better results. The variants will be the thickness of the acrylic resin, the use of rigid liner and the structural modification of the acrylic resin with silica and silver particles. The time that heat or cold takes to travel the surface of the acrylic resin will be quantified until the device report¬¬s changes in the temperature gradient. Samples without these particles will be done as a control group. The data computed will be submitted to more appropriate statistical analysis.