Banca de QUALIFICAÇÃO: JESSIKA RAISSA MEDEIROS DE ALMEIDA

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : JESSIKA RAISSA MEDEIROS DE ALMEIDA
DATA : 27/09/2018
HORA: 09:00
LOCAL: Departamento de Odontologia
TÍTULO:

EVALUATION OF SUPERFICIAL ROUGHNESS AND SURFACE TOPOGRAPHY OF BULK FILL, CONVENTIONAL AND FLOW COMPOSITES BEFORE AND AFTER SIMULATED TOOTHBRUSHING

PALAVRAS-CHAVES:

Surface properties, scanning electronic microscopy, wear.

PÁGINAS: 30
GRANDE ÁREA: Ciências da Saúde
ÁREA: Odontologia
SUBÁREA: Materiais Odontológicos
RESUMO:

The increasing of the aesthetic exigency by the patients and the continual development of materials – such as bulk fill and flow composites, demands a crescent need of studies on this area to evaluate the properties of the materials when submitted to the wear occasioned by toothbrushing abrasion over time. This study aims to evaluate the surface characteristics of restorations performed before and after the process of simulated toothbrushing and to compare the results between the composites. In total, 80 samples will be made (7x4mm), being 20 to each type of resin utilized, color A1: Bulk Fill One (3M/ESPE, St. Paul, MN, USA), Bulk Fill Flow (3M/ESPE, St. Paul, MN, USA), Z350XT 3M/ESPE St. Paul, MN, USA) e Z350XT Flow (3M/ESPE, St. Paul, MN, USA). After the confection of the specimens, the samples will be immersed in distilled water for 24 hours and stored at 37°C in stove, moment which will be performed the finishing and polishing with the sequence of sandpaper discs (TDV, Brasil). Half of the specimens will be submitted to 60,000 cycles of simulated toothbrushing, meanwhile the other half will be the control group (n=8). The surface of the restorations will be evaluated through Scanning Electronic Microscopy (SEM), surface roughness (Ra), and weight loss, in two moments: before and after the process of simulated toothbrushing. To the statistical analysis, it will be used the variance analysis ANOVA. In the analysis performed by SEM, in amplification of 500x, it was observed the presence of medium and small protruding particles in all resins tested after the toothbrushing with 60,000 cycles, with exception of the resin Z350 flow.

MEMBROS DA BANCA:
Presidente - 2966816 - MARILIA REGALADO GALVAO RABELO CALDAS
Interno - 2292784 - ISAUREMI VIEIRA DE ASSUNCAO
Externo ao Programa - 1247082 - DIANA FERREIRA GADELHA DE ARAUJO