65 documents found, page 1 of 7
Force Degradation of Elastomeric Chains after Storage Time and Mechanical Brushing
Silva Chaves-Filho,Antonio Carlos da; Costa,Ana Rosa; Borges,Lincoln Pires Sousa; Santos,Eduardo Cesar Almada; Crepaldi,Marcus ViniciusAbstract The purpose of this in vitro study was to evaluate the force decrease of different elastomeric chains after different times: initial, 10 minutes, 1 day, 28 days and after mechanical brushing. Twenty orthodontic elastomeric chains segments were utilized for each commercial brand. Initially, the elastomeric chain of 15mm long were immediate stretched up to 20 mm in an Instron and the force was measured i...
CHX Stabilizes the Resin/demineralized Dentin Interface
Costa,Ana Rosa; Naves,Lucas Zago; Garcia-Godoy,Franklin; Tsuzuki,Fernanda Midori; Correr,Américo Bortolazzo; Correr-Sobrinho,LourençoAbstract The aim of this study was to evaluate the effect of 2% chlorhexidine digluconate (CHX) on microtensile bond strength (µTBS) between an adhesive system and under 3 dentin conditions. For that, this study evaluated the adhesive interface at initial, after 6 months and 1 year of storage. Forty-eight human third molars were prepared and randomly divided into 3 groups, according to dentin substrates: sound ...
Do dual-cure bulk-fill resin composites reduce gaps and improve depth of cure
Fraga,May Anny Alves; Correr-Sobrinho,Lourenço; Sinhoreti,Mário Alexandre Coelho; Carletti,Talita Malini; Correr,Américo BortolazzoAbstract This in vitro study aimed to evaluate the gaps length and depth of cure of dual-cure bulk-fill resin composites inserted in box-shaped preparations. Box-shaped preparations (4 mm deep) were made in fifteen human third-molars and divided into three groups according to the resin composites (n=5): Dual-cure bulk-fill BulkEZ (BEZ); Dual-cure bulk-fill HyperFIL (HF); and Tetric Evoceram Bulk-fill (TETRIC), ...
Light Activation and Thermocycling Methods on the Shear Bond Strength of Bracke...
Lopes,Gustavo Vallandro; Correr-Sobrinho,Lourenço; Correr,Américo Bortolazzo; Godoi,Ana Paula Terossi de; Vedovello,Silvia Amélia ScudelerAbstract The present study was evaluated the effect of different light activation and thermocycling methods on the shear bond strength (SBS) and on the adhesive remnant index (ARI) of metal brackets bonded to feldspathic ceramic. Hundred metal brackets were bonded to 20 porcelain cylinders, divided into four groups (n=25) based on light activation and thermocycling processes. The cylinders were etched with 10% ...
Physical-Mechanical Properties of Bulk Fill Composites Submitted to Biodegradat...
Camassari,Jessica Rodrigues; Correr-Sobrinho,Lourenço; Correr,Américo Bortolazzo; Puppin-Rontani,Julia; Stipp,Rafael NobregaAbstract The aim of this study was to evaluate the Streptococcus mutans biofilm influence on the roughness (Ra), gloss (GU), surface hardness (KHN) and flexural strength (FS) of high viscosity bulk fill composites. Filtek Bulk Fill (FBF), Tetric N Ceram Bulk Fill (TNC), X-tra fil Bulk Fill (XF) and Filtek Z350 (FZ) were used. Ten discs of each composite were prepared for Ra, KHN and GU and 20 bars for the FS. A...
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...
Color Stability and Gloss of Esthetic Restorative Materials after Chemical Chal...
Ozera,Eduardo Haruki; Pascon,Fernanda Miori; Correr,Américo Bortolazzo; Puppin-Rontani,Regina Maria; Castilho,Aline Rogéria de; Correr-Sobrinho,LourençoAbstract This study evaluated gloss and color changes of esthetic restorative materials subjected to different acidic beverages. Specimens of resin composites (Z350XT (Z350), IPS Empress Direct (ED), Charisma Diamond (CD)) were prepared and the initial surface gloss and color (ΔE) were measured (n=10). Then, the specimens were immersed in 4 mL of each of the different beverages (cranberry juice; Coca-Cola; coff...
Effect of Hydrofluoric Acid Concentration and Thermal Cycling on the Bond Stren...
Aguiar,Ana Paula; Costa,Ana Rosa; Correr,Américo Bortolazzo; Vedovello,Silvia Amélia; Vedovello Filho,Mário; Crepaldi,Marcus ViniciusAbstract This study to evaluate the effects of different hydrofluoric acid (HF) concentrations and thermal cycling on the shear bond strength (SBS) of brackets to ceramic. Cylinders of ceramic were divided into 10 groups (n=15), according to HF concentrations: 1-1%;2-2.5%;3-5%;4-7.5%;5-10% (storage 24 h); 6-1%;7-2.5%;8-5%;9-7.5%; and, 10-10% (thermal cycling). All cylinders were etched for 60s and received one ...
Influence of the incorporation of triclosan methacrylate on the physical proper...
Paula,Andreia Bolzan de; Alonso,Roberta Caroline Bruschi; Taparelli,Jesus Roberto; Camassari,Jéssica Rodrigues; Innocentini-Mei,Lúcia HelenaAbstract The incorporation of antimicrobials in the composites as an attempt to reduce bacterial adhesion without jeopardizing mechanical properties is a challenge for Dentistry. Objective: To evaluate the bacterial adhesion and physical properties of a composite containing the methacrylate triclosan- derivative monomer (TM). Methodology: TM was synthesized and added to an experimental composite. Samples were d...
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- ...