title: Mechanical properties of cast commercially pure titanium simulating ceramic firing cycles.
abstract: OBJECTIVE
  To evaluate the mechanical properties (ultimate tensile strength, elongation and hardness) of the commercially pure titanium (cp Ti) as casting and after ceramic firing cycles.
  
  
  METHODS
  Dumbbell-shaped specimens were prepared for the tensile strength testing. Disk-shaped cast specimens were used for microhardness testing. The ceramic firing cycles were made simulating a low fusion ceramic application. Tensile testing was conducted in a universal testing machine at a crosshead speed of 1 mm/min until failure. Ultimate tensile strength and elongation were recorded. The fracture mode was analyzed by scanning electron microscopy. Vickers hardness was measured in a hardness tester. The data from the tensile and hardness tests were subjected to a one-way analysis of variance and Tukey's test (α = 0.05).
  
  
  RESULTS
  The mean values of tensile strength were not changed by the ceramic firing cycles. Lower hardness was observed for cp Ti as casting compared with Ti cast after the firing cycles.
  
  
  CONCLUSIONS
  The ceramic firing cycles did not show any considerable prejudicial effects on the mechanical properties of the cp Ti.
authors.affiliation: Department of Restorative Dentistry, Piracicaba Dental School, State University of Campinas, Piracicaba, Sao Paulo, Brazil.
authors.forename: Johnson Campideli
authors.initials: JC
authors.lastname: Fonseca
authors.forename: Aloisio Oro
authors.initials: AO
authors.lastname: Spazzin
authors.forename: Lucas Zago
authors.initials: LZ
authors.lastname: Naves
authors.forename: Ana Rosa
authors.initials: AR
authors.lastname: Costa
authors.forename: Lourenco
authors.initials: L
authors.lastname: Correr-Sobrinho
authors.forename: Guilhereme Elias Pessanha
authors.initials: GE
authors.lastname: Henriques
mesh_terms: D003735:Dental Casting Technique; D003776:Dental Porcelain; D003799:Dental Stress Analysis; D004548:Elasticity; D006244:Hardness; D008422:Materials Testing; D016876:Metal Ceramic Alloys; D013718:Tensile Strength; D014025:Titanium
chemical_list: D016876:Metal Ceramic Alloys; D003776:Dental Porcelain; D014025:Titanium