25 documents found, page 1 of 3
Feldspathic and Lithium Disilicate Onlays with a 2-Year Follow-Up: Split-Mouth ...
Saavedra,Guilherme de Siqueira Ferreira Anzaloni; Tribst,João Paulo Mendes; Ramos,Nathália de Carvalho; Melo,Renata Marques de; Rodrigues,Vinícius AnéasAbstract The present study was a prospective, controlled, randomized, clinical short-term trial aiming to evaluate the clinical performance of adhesively luted, lithium disilicate and feldspathic glass-ceramics onlays over a period up to 2 years. A total of 11 patients (7 female, 4 male; age range: 18-60 years, mean age: 39 years) were selected for this study. Each patient received a maximum of two restorations...
CAD-FEA modeling and fracture resistance of bilayer zirconia crowns manufacture...
Lima,Julia Magalhães Costa; Costa,Anna Karina Figueiredo; Anami,Lilian Costa; Souza,Karina Barbosa; Silva,Nathalia Ramos daAbstract In the RLT (Rapid Layer Technology), veneering ceramic and framework are fabricated by computer-aided design/computer-aided manufacturing (CAD/CAM) and then cemented to obtain the restoration. This study aimed to evaluate the effect of the thickness of veneering ceramic manufactured by the RLT technique on the fracture resistance (FR) of bilayer crowns with zirconia frameworks. Twenty zirconia framewor...
Reinforced Glass-ceramics: Parametric Inspection of Three-Dimensional Wear and ...
Tribst,João Paulo Mendes; Alves,Larissa Marcia Marques; Piva,Amanda Maria de Oliveira Dal; Melo,Renata Marques de; Borges,Alexandre Luiz SoutoAbstract The aim of this study was to investigate the three-dimensional wear, volumetric loss and surface roughness after chewing simulation of two glass ceramics. Lithium disilicate (LD, Emax CAD, Ivoclar) and Zirconia reinforced lithium silicate (ZLS, Vita Suprinity, Vita Zhanfabrick) discs (n=20/g) were scanned to obtain stereolithography (STL) files for each sample. All discs were submitted to chewing simul...
Bond strength between a polymer-infiltrated ceramic network and a composite for...
Silva,Pollyanna Nogueira Ferreira da; Martinelli-Lobo,Carolina Machado; Bottino,Marco Antonio; Melo,Renata Marques de; Valandro,Luiz FelipeAbstract: The effects of several ceramic surface treatments on bond strength of a polymer-infiltrated ceramic network and resin composite as repair material were evaluated. CAD-CAM blocks of a polymer-infiltrated ceramic network (Vita Enamic) were sliced and subjected to aging process, followed by embedding in acrylic resin. The bonding/repair area was treated as follows (n = 30): C– without treatment; UA– univ...
Influence of ceramic material, thickness of restoration and cement layer on str...
Tribst,João Paulo Mendes; Dal Piva,Amanda Maria de Oliveira; Penteado,Marcela Moreira; Borges,Alexandre Luiz Souto; Bottino,Marco AntonioAbstract The aim of this study was to evaluate stress distribution in an occlusal veneer according to the restorative material, restoration thickness, and cement layer thickness. A tridimensional model of a human maxillary first molar with an occlusal veneer preparation was constructed using a modeling software of finite element analysis. The model was replicated 9 times to evaluate the factors: restoration thi...
Low-Fusing Porcelain Glaze Application on 3Y-TZP Surfaces can Enhance Zirconia-...
Yamamoto,Lígia Tiaki; Rodrigues,Vinícius Anéas; Dornelles,Lucio Strazzabosco; Bottino,Marco Antonio; Valandro,Luiz Felipe; Melo,Renata Marques deAbstract The aim of this study was to assess whether surface treatment improves zirconia-porcelain adhesion. The 3Y-TZP blocks were cut into squares, then polished and sintered. The zirconia surface treatments were performed as follows: no treatment (C); tribochemical silica coating (TBS); glaze application + hydrofluoric acid etching (GA); glaze application + hydrofluoric acid etching + silanization (GAS); dep...
Bonding of the Polymer Polyetheretherketone (PEEK) to Human Dentin: Effect of S...
Rocha,Regina Furbino Villefort; Anami,Lilian Costa; Campos,Tiago Moreira Bastos; Melo,Renata Marques de; Souza,Rodrigo Othávio de Assunção eAbstract Polyetheretherketone (PEEK) is a material suitable for frameworks of fixed dental prostheses. The effect of different surface treatments on the bond strength of PEEK bonded to human dentin was evaluated. One hundred PEEK cylinders (3 mm×3 mm) were divided into five groups according to surface treatment: silica coating, sandblasting with 45 μm Al2O3 particles, etching with 98% sulfuric acid for 5, 30 an...
Effect of Finish Line on Marginal Fit of Sintered Gold Copings
Gwinner,Fernanda Pelogia; Bottino,Marco Antonio; Nogueira-Junior,Lafayete; Bona,Alvaro DellaThe aim of this study was to evaluate the vertical marginal gap of sintered gold copings and metal-ceramic crowns with different finish line preparations: a beveled round shoulder (BRS) and a beveled long chamfer (BLC), testing the null hypotheses that there are no differences in marginal gap regardless of finish line and phase of restoration (coping or crown). Stainless steel master models were fabricated to s...
Surface agents' influence on the flexural strength of bilaminated ceramics
Lima,Julia Magalhaes Costa; Anami,Lilian Costa; Rippe,Marilia Pivetta; Melo,Renata Marques de; Bottino,Marco Antonio; Valera,Marcia CarneiroThe objective of this study was to evaluate the influence of different surface agents on the flexural strength of a ceramic system. Eighty bar-shaped specimens of zirconia were divided into four groups according to the agent to be used: group Control - to be cleaned with alcohol; group VM9 - application of a fluid layer of porcelain; group Effect Bonder - application of a bonding agent; and group Coloring Liqui...
Deposition of SiOx thin films on Y-TZP by reactive magnetron sputtering: influe...
Queiroz,José Renato Calvacanti de; Duarte,Diego Alexandre; Souza,Rodrigo Othávio de Assunção e; Fissmer,Sara Fernanda; Massi,MarcosIn this paper SiOx thin films were deposited on Y-TZP ceramics by reactive magnetron sputtering technique in order to improve the adhesion properties between Y-TZP and resin cement for applications in dental prosthesis. For fixed cathode voltage, target current, working pressure and target-to-substrate distance, SiOx thin films were deposited at different oxygen concentrations in the Ar+O2 plasma forming gas. A...