Banca de QUALIFICAÇÃO: MARCELLA GUEDES PEREIRA GOUVÊA BEZERRA

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : MARCELLA GUEDES PEREIRA GOUVÊA BEZERRA
DATE: 08/06/2022
TIME: 08:00
LOCAL: PLATAFORMA REMOTA
TITLE:

INFLUENCE OF THE BUILD ANGLE AND THICKNESS OF THE PRINTING LAYER ON THE FLEXURAL PROPERTIES, POROSITY AND DIMENSIONAL ACCURACY OF PRINTED RESIN

KEY WORDS:

3D printing, printed resin, angulation, layer thickness.  

PAGES: 35
BIG AREA: Ciências da Saúde
AREA: Odontologia
SUBÁREA: Clínica Odontológica
SUMMARY:

 The objective of the present research is to evaluate the effect of angulation, printing layer thickness and aging on the flexural strength (), porosity and accuracy of a printed provisional resin (Cosmos Temp, Yller,). From the modeling of a bar (26 x 2.2 x 2.2mm) in Meshmixer software (Autodesk) and obtaining an STL file, it will be exported to the SLA 3D printer software (Formlabs), where 450 bars in the same dimensions will be printed (n=15) according to the factors “thickness” (25μm; 50μm; 100μm), “angulation” (00; 300; 450; 600 and 900) and “thermocycling” (with or without). After printing, the samples were subjected to post-processing in an ultraviolet oven (Anycubic, China) for 15 min. Afterwards, the bars that will undergo aging will be subjected to thermocycling (10,000 cycles, 50-550C). The bars will be subjected to the 3-point  test in a universal testing machine (100KgF, 1mm/min). Complementary analyzes of degree of conversion, fractured surface analysis (stereomicroscope and SEM) and porosity will be performed. The precision analysis will be performed by comparing the initially planned measurements of the bars with their dimensions after printing, using a digital caliper. For the data (MPa) of flexural strength and porosity (%) 3-way ANOVA, Tukey (5%) and Weibull analysis will be performed. As for the precision data, the paired T test (5%) will be performed. With the present study, it is expected to elucidate the influence of impression parameters and indicate the protocols that produce the best mechanical properties of provisional restorations made from 3D printed resins. Keywords: 3D printing, printed resin, angulation, layer thickness.  

BANKING MEMBERS:
Presidente - 1640419 - RODRIGO OTHAVIO DE ASSUNCAO E SOUZA
Interna - 1459400 - ADRIANA DA FONTE PORTO CARREIRO
Externa à Instituição - DAYANNE MONIELLE DUARTE MOURA - UERN