4 documents found, page 1 of 1
Characterization of Residual Stresses in Veneering Ceramics for Prostheses with...
Reginato,Vagner Flávio; Kemmoku,Daniel Takanori; Caldas¹,Ricardo Armini; Bacchi³,Ataís; Pfeifer,Carmem Silvia; Consani,Rafael Leonardo XediekAbstract The aim of this study was to evaluate the influence of the coefficient of thermal expansion (CTE or α) and glass transition temperature (Tg) of three veneering ceramics used with zirconia frameworks of full-arch fixed prostheses. The generation of residual stresses and linear contraction after the simulation of the cooling process and mechanical loading were measured. The analysis was based on the fini...
The effect of hydrofluoric acid and resin cement formulation on the bond streng...
Sundfeld,Daniel; Palialol,Alan Rodrigo Muniz; Fugolin,Ana Paula Piovesan; Ambrosano,Gláucia Maria Bovi; Correr-Sobrinho,LourençoAbstract To investigate how the hydrofluoric acid (HF) concentrations applied to a lithium disilicate glass-ceramic (EMX) affects the surface morphology and microtensile bond strength (μTBS) of ceramics to dentin, using light-cured resin cements with or without UDMA. Sixty-three EMX square ceramic blocks were etched for 20 seconds using different HF concentrations (1%, 5% and 10%) and luted to dentin using two ...
Repair Strength in Simulated Restorations of Methacrylate- or Silorane-Based Co...
Consani,Rafael Leonardo Xediek; Marinho,Tatiane; Bacchi,Atais; Caldas,Ricardo Armini; Feitosa,Victor Pinheiro; Pfeifer,Carmem SilviaAbstract The study verified the bond strength in simulated dental restorations of silorane- or methacrylate-based composites repaired with methacrylate-based composite. Methacrylate- (P60) or silorane-based (P90) composites were used associated with adhesive (Adper Single Bond 2). Twenty-four hemi-hourglass-shaped samples were repaired with each composite (n=12). Samples were divided according to groups: G1= P6...
The Effect of Hydrofluoric Acid Concentration and Heat on the Bonding to Lithiu...
Sundfeld,Daniel; Correr-Sobrinho,Lourenço; Pini,Núbia Inocêncya Pavesi; Costa,Ana Rosa; Sundfeld,Renato Herman; Pfeifer,Carmem SilviaAbstract The aim of this study was to evaluate the effects of hydrofluoric acid (HF) concentration and previous heat treatment (PHT) on the surface morphology and micro-shear bond strength (mSBS) of a lithium disilicate glass ceramic (EMX) to resin cement. One hundred four EMX specimens were randomly assigned to two groups (n=52) according to the HF concentration: 5% and 10%. A new random distribution was made ...