Wear resistance of a pressable low-fusing ceramic opposing conventional dental alloys and CP Ti

• Grant number: 11/21778-4
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: February 01, 2012
• End date: January 31, 2013
• Field of knowledge: Health Sciences - Dentistry - Dental Clinics
• Principal Investigator: Adriana Cláudia Lapria Faria
• Grantee: André Almeida de Oliveira
• Host Institution: Faculdade de Odontologia de Ribeirão Preto (FORP). Universidade de São Paulo (USP). Ribeirão Preto , SP, Brazil

Abstract

Dental alloys have been increasingly replaced by ceramics because of aesthetics and improved physical and mechanical properties that have afforded the construction of restorations without metal, known as metal-free. However, a difficulty to be overcome in ceramic systems is the abrasion. Studies demonstrate that feldspathic porcelains are more abrasive than pressable ceramics. Nevertheless, there are studies relating that low-fusing ceramics and conventional feldspathic porcelains wear equally dental enamel. Enamel is the ideal antagonist, but restorative materials replace enamel because of caries, periodontal disease or trauma. Among the available restorative materials, there are composites, alloys and ceramics. Several studies evaluated wear resistance of the materials using ceramics, composites and gold alloys as antagonists, but there are lack of studies that correlate wear of pressable ceramics opposed to dental alloys commonly used in the oral cavity of the patients, such as nickel-chromium, cobalt-chromium and pure titanium. Thus, the aim of this in vitro study is to evaluate wear resistance and microhardness of a pressable low-fusing ceramic opposing to different restorative materials: commercially pure titanium (cp Ti), nickel-chromium alloy (Ni-Cr) and cobalt-chromium alloy (Co-Cr). (AU)

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)

LAPRIA FARIA, ADRIANA CLAUDIA; DE OLIVEIRA, ANDRE ALMEIDA; GOMES, ERICA ALVES; SILVEIRA RODRIGUES, RENATA CRISTINA; RIBEIRO, RICARDO FARIA. Wear resistance of a pressable low-fusing ceramic opposed by dental alloys. JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS, v. 32, p. 46-51, APR 2014. (11/21778-4)