9 documents found, page 1 of 1
Fracture strength of teeth restored with milled ultrathin occlusal veneers made...
Ohse,Laerte; Stona,Deborah; Sly,Marília M.; Burnett Júnior,Luiz Henrique; Spohr,Ana MariaAbstract The purpose was to evaluate, in vitro, the fracture strength of teeth restored with 0.3- or 0.6-mm-thick occlusal veneers made of Vita Enamic® bonded to enamel or dentin. Fifty third molars were allocated into five groups (n=10): Group C - control (sound teeth); Group 0.3E - 0.3-mm-thick occlusal veneers bonded to enamel; Group 0.6E - 0.6-mm-thick occlusal veneers bonded to enamel; Group 0.3D - 0.3-mm-...
Effect of Cariogenic Challenge on the Degradation of Adhesive-Dentin Interfaces
Manfroi,Fernanda Borguetti; Ethur,Eduardo Miranda; Somacal,Deise Caren; Paludo,Tamara; Spohr,Ana MariaAbstract The aim was to evaluate, in vitro, the influence of pH cycling on microtensile bond strength (µTBS) and percentage of nanoleakage (%NL) in the dentin-adhesive interface. Flat dentin surfaces were obtained in 56 extracted third molars. The teeth were randomly divided into four groups (n=14): G1- Single Bond Universal (etch-and-rinse mode); G2- Single Bond Universal (self-etch mode); G3- Scotchbond Multi...
Interfacial Stress and Bond Strength of Bulk-Fill or Conventional Composite Res...
Duarte,Júlio César Lemos; Costa,Ana Rosa; Veríssimo,Crisnicaw; Duarte,Renata Webster; Calabrez Filho,Saturnino; Spohr,Ana Maria; Borges,Gilberto AntonioAbstract The aim was to evaluate the microtensile bond strength (mTBS) to dentin and interfacial stress in a class II cavity restored with bulk-fill or conventional composite resins and the margin interfaces. Vertical slot class II cavities in the mesial face, with the gingival end in dentin, were prepared in 72 third molars, being divided into groups (n=24): G1-Tetric N-Ceram; G2-Tetric N-Ceram Bulk-Fill; G3-S...
Effect of Dentin Preparation Mode on the Bond Strength Between Human Dentin and...
Cerqueira,Lara Almeida Cyrillo; Costa,Ana Rosa; Spohr,Ana Maria; Miyashita,Eduardo; Miranzi,Benito André Silveira; Calabrez Filho,SaturninoAbstract The aim was to evaluate the influence of different dentin preparation mode in the smear layer characteristics (SL), hybrid layer (HL), and microtensile bond strength (µTBS) to dentin with two resin cements. The occlusal dentin of 120 third molars was exposed. The teeth were divided into 4 groups (n=30) according to the dentin preparation mode: 1- fine grain diamond bur; 2- coarse grain diamond bur; 3- ...
Prototype to measure bracket debonding force in vivo
Tonus,Jéssika Lagni; Manfroi,Fernanda Borguetti; Borges,Gilberto Antonio; Grigolo,Eduardo Correa; Helegda,Sérgio; Spohr,Ana MariaABSTRACT Introduction: Material biodegradation that occurs in the mouth may interfere in the bonding strength between the bracket and the enamel, causing lower bond strength values in vivo, in comparison with in vitro studies. Objective: To develop a prototype to measure bracket debonding force in vivo and to evaluate, in vitro, the bond strength obtained with the prototype. Methods: A original plier (3M Unitek...
Microtensile bond strength of CAD/CAM materials to dentin under different adhes...
Bellan,Mariá Cortina; Cunha,Patrícia Fernandes Jerzewski Sotero da; Tavares,Julieta Gomes; Spohr,Ana Maria; Mota,Eduardo GonçalvesAbstract: The present study aimed to evaluate the microtensile bond strength (μTBS) of novel computer-aided design/computer-aided manufacturing (CAD/CAM) restorative materials to dentin using different adhesive strategies. Thirty-two crowns were milled using CAD/CAM materials (Vita Mark II as control, Vita Suprinity, Vita Enamic and Lava Ultimate) and luted to dentin using different resin cements (RelyX ARC, Re...
Assessment of the dimensions and surface characteristics of orthodontic wires a...
Dolci,Gabriel Schmidt; Spohr,Ana Maria; Zimmer,Eduardo Rigon; Marchioro,Ernani MenezesOBJECTIVE: The purpose of this study was to evaluate the dimensions and surface characteristics of orthodontic wires and bracket slots of different commercial brands. METHODS: Thirty metallic brackets (0.022 x 0.028-in and 0.022 x 0.030-in) were divided in three groups: DYN/3M group = Dyna-Lock, 3M/Unitek (stainless steel, or SS); STD/MO group = Slim Morelli (SS); and Ni-Free/MO group = Slim Morelli (Ni-Free). ...
Effect of refrigeration on bond strength of self-etching adhesive systems
Borges,Gilberto Antonio; Spohr,Ana Maria; Oliveira,Wildomar José de; Correr-Sobrinho,Lourenço; Correr,Américo Bortolazzo; Borges,Luis HenriqueThe purpose of this study was to investigate the tensile bond strength to dentin of three self-etching adhesive systems at refrigerated and room temperatures. Seventy-eight bovine incisors were embedded in self-cured acrylic resin, abraded on a water-cooled lathe and polished with 400- and 600-grit sandpapers to obtain standard dentin surfaces. The specimens were randomly assigned to 6 groups (n=13). Clearfil S...
A influência do jateamento na cimentação de bandas ortodônticas
Weissheimer,Felipe; Marchioro,Ernani Menezes; Dolci,Gabriel Schmidt; Spohr,Ana Maria; Hahn,LucianeOBJETIVO: comparar a resistência ao cisalhamento de cinco materiais utilizados na cimentação de bandas ortodônticas: um cimento de ionômero de vidro convencional (Ketac Cem), dois cimentos de ionômero de vidro modificados por resina (3M Multicure Glass Ionomer Cement e Fuji Ortho LC) e duas resinas compostas modificadas por poliácidos (Ultra Band-Lok e Transbond Plus). METODOLOGIA: sobre a superfície de um segm...