7 documents found, page 1 of 1
Effect of Conditioning Protocols and Ultrasonic Application of an Infiltrant Re...
López López,Edgar Alexander; Dominguez,John Alexis; Gomes,Giovana Mongruel; Mora,Camilo Andrés Pulido; Bittencourt,Bruna Fortes; Gomes,João CarlosAbstract The aim of this study was to evaluate different conditioning protocols and sonic/ultrasonic application of an infiltrant resin (IR) in artificial white spot lesions (AWSL). the V/L surfaces of 48 molars were induced to an AWSL and divided in 6 groups, according to the conditioning protocols and application technique: 15% hydrochloric acid (HA) + manual application of the IR; HA + 37% phosphoric acid (P...
Effect of the Bis-Dimethylamino Benzydrol Coinitiator on the Mechanical and Bio...
Bittencourt,Bruna Fortes; Dominguez,John Alexis; Pinheiro,Luís Antonio; Farago,Paulo Vitor; Santos,Elizabete Brasil dos; Campos,Leticia AntoneloAbstract To examine the effect of the alternative coinitiator 4,4’bis dimethylamino benzydrol (BZN) in degree of conversion (DC), mechanical and biological properties of experimental composites. The coinitiator BZN was used in three concentrations (0.2, 0.5 and 1.2%), and the coinitiator DMAEMA was used as control at the same concentrations as above. The molar concentration of camphorquinone (CQ) and coinitiato...
Active and Passive Application of the Phosphoric Acid on the Bond Strength of L...
Giraldo,Tatiana Cardona; Villada,Vanessa Roldan; Castillo,Mauricio Peña; Gomes,Osnara Maria Mongruel; Bittencourt,Bruna Fortes; Dominguez,John AlexisAbstract The objective of this study was to evaluate the effect of passive or active phosphoric acid (PA) application after hydrofluoric acid (HA) treatment on the microshear bond strength of lithium disilicate. Thirty ceramic discs were made with IPS Emax 2 (10 mm thick and 10 mm diameter). The specimens were divided into 3 groups, A: 9.6% HA application; AF: 9.6% HA application + cleaning with 37% PA in passi...
Effect of bleaching agents containing fluoride or calcium on enamel microhardne...
Rauen,Charles Alex; Chidoski Filho,Júlio Cezar; Bittencourt,Bruna Fortes; Gomes,Giovana Mongruel; Gomes,João Carlos; Gomes,Osnara Maria MongruelAbstract Aim: To evaluate the effect of different in-office bleaching agents on the permeability, roughness and surface microhardness of human enamel. Methods: For evaluation of roughness and microhardness, 40 hemi-faces of 20 premolars were subjected to initial roughness (Ra parameter) and microhardness (VHN) measurements. Thirty-two premolar's crowns were used for permeability test. Then, all specimens were r...
Clinical Evaluation of the Whitening Effect of Over-the-Counter Dentifrices on ...
Horn,Bruna Andrade; Bittencourt,Bruna Fortes; Gomes,Osnara Maria Mongruel; Farhat,Patrícia AlmeidaThis randomized clinical trial evaluated the whitening potential of commercially available toothpastes. Sixty patients were selected and randomly divided into 4 groups (n=15), according to the dentifrice used: GI (control) - Colgate Total 12, GII - Close-up White Now, GIII: Oral-B 3D White, GIV: Colgate Luminous White. Three daily brushings were performed for 2 to 3 min each, during a period of 15 days. Patient...
Effect of finishing and polishing on surface roughness of composite resins afte...
Bittencourt,Bruna Fortes; Gomes,Giovana Mongruel; Trentini,Felipe Auer; Azevedo,Mônica Regina de; Gomes,João Carlos; Gomes,Osnara Maria MongruelAIM: To evaluate the influence of finishing and polishing techniques on the surface roughness of two composite resins (CRs) subjected to bleaching procedure.METHODS: Forty-eight CR specimens were divided into six groups (n=8). For G1 to G3, a microhybrid CR (Opallis; FGM) was used, and G4 to G6, received a nanohybrid CR (Brilliant NewLine; Coltène/Whaledent). All specimens were subjected to bleaching procedure ...
Evaluation of human enamel permeability exposed to bleaching agents
Horning,Diego; Gomes,Giovana Mongruel; Bittencourt,Bruna Fortes; Ruiz,Lucas Manuel; Reis,Alessandra; Gomes,Osnara Maria MongruelAIM: To evaluate the human enamel permeability after different external bleaching techniques. METHODS: The coronal portions of 20 maxillary human incisors were covered with an acid resistant varnish, except the labial surface, to prevent dye penetration of silver nitrate. The specimens were divided randomly into four groups (n=5) according to the bleaching treatments: Group 1 (G1) - without bleaching agent (con...