34 documents found, page 1 of 4
Light Transmittance and Depth of Cure of a Bulk Fill Composite Based on the Exp...
Rocha,Mateus Garcia; Roulet,Jean-François; Sinhoreti,Mario Alexandre Coelho; Correr,Américo Bortolazzo; Oliveira,DayaneAbstract The objective of this study was to evaluate the effect of the exposure reciprocity law of a multi-wave light-emitting diode (LED) on the light transmittance (LT), depth of cure (DOC) and degree of conversion in-depth (DC) of a bulk fill composite. A bulk fill composite (EvoCeram® bulk fill, Ivoclar Vivadent) was photoactivated using the multi-wave LED (VALO™ Cordless, Ultradent). The LED was previously...
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), ...
Effect of combining photoinitiators on cure efficiency of dental resin-based co...
Lara,Lucas; Rocha,Mateus Garcia; Menezes,Livia Rodrigues de; Correr,Américo Bortolazzo; Sinhoreti,Mario Alexandre Coelho; Oliveira,DayaneAbstract Camphorquinone is the most conventionally used photoinitiator in Dentistry. Although different alternative photoinitiators have been proposed, no photoinitiator was capable of completely substituting camphorquinone. The combination of photoinitiators has been considered the best alternative. Objectives: To evaluate the effect of combining Norrish type I and II photoinitiators on the cure efficiency of ...
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...
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 ...
Effect of Ceramic Interposition and Post-activation Times on Knoop Hardness of ...
Moreno,Marina Barrêto Pereira; Costa,Ana Rosa; Rueggeberg,Frederick Allen; Correr,Américo Bortolazzo; Sinhoreti,Mário Alexandre CoelhoAbstract The aim of this study was to evaluate Knoop hardness of different shades of a resin cement light-cured directly or through ceramic discs, measured 15 min or 24 h after light exposure, and at different depths. Specimens of a commercial resin cement (Variolink Veneer) in seven shades, were fabricated in an elastomeric mold, covered with a mylar strip, a 0.7 mm thick ceramic disc (IPS e.max Press) was pla...