Banca de DEFESA: FERNANDA GURGEL DE GOIS MOREIRA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : FERNANDA GURGEL DE GOIS MOREIRA
DATE: 09/08/2022
TIME: 09:00
LOCAL: DEPARTAMENTO DE ODONTOLOGIA - AUDITÓRIO
TITLE:

INFLUENCE OF PRINT TYPE, POST PROCESSING AND RESIN TYPE ON FLEXURAL STRENGTH AND DIMENSIONAL STABILITY OF PRINTED RESINS.

KEY WORDS:

Printing, Three-Dimensional; flexural strength, Dental Materials.

PAGES: 67
BIG AREA: Ciências da Saúde
AREA: Odontologia
SUBÁREA: Clínica Odontológica
SUMMARY:

Objective: To evaluate the influence of different post-processing protocols and the type of 3D printing of different printed resins on the three-point bending strength (s) and dimensional stability. Methodology: A bar was modeled (26 x 2.2 x 2.2mm) on Mishmixer software and a STL file was obtained, the it was exported to the 3D printer software SLA (Forms 2/Formslab) and LCD (FlashForge Photo 6.0/ FlashForge). Then, 45 bars of each type of resin (Pr - Provisional/Cosmos Temp, Yller; Pl - Occlusal Plate/Cosmos Splint, Yller; Mo – Models/ Cosmos Model, Yller) were printed by each printing system (SLA and LCD). After printing, the bars of each type of resin were cleaned with isopropyl alcohol and randomly divided (n=15) according to factors: “Post-processing protocol” Control (C: without post-processing); Ultraviolet Light (UV: 15 min in Anycubic Wash and Cure Plus, Anycubic) and Microwave (M: 15 min in microwave oven/1,400W). Thein, the bars were submitted to the s test (100KgF, 1mm/min) and data (MPa) analyzed with 2-way ANOVA and Tukey (5%). Complementary analyzes of dimensional stability (analyzed by paired T tests and 2-way ANOVA) and SEM of surfaces and fractures were also performed. Results: For flexural strength, ANOVA revealed that the factors "Printer" (p<0.05) and "Post processing" (p<0.05) and the interaction between them (p<0.05) presented statistical significance for all the types of resin used in this study. In turn, the groups processed in ultraviolet light, whether in model resin: SLAMod-UV (33.80±4.82AMPa), LCDMod-UV (35.93±4.47AMPa); provisional: LCDProv-UV (52.06±12.40AMPa), SLAProv-UV (42.86±2.09BMPa) or oclusal split: LCDPl-UV (91.46±12.33AMPa), LCDPl-UV (33.20 ±4.84BMPa) showed higher values of  , being statistically superior to the groups without microwave processing and post-processed (Tukey 5%).Conclusion: Post-processing in ultraviolet light should be the choice regardless of type of resin, since this protocol promotes better values of flexural strength and that this strength varies according to the type of resin. As well, that the LCD printing technique for the three types of resin can be the most indicated when associated with post processing in ultraviolet light.

COMMITTEE MEMBERS:
Presidente - 1640419 - RODRIGO OTHAVIO DE ASSUNCAO E SOUZA
Externa ao Programa - 2492886 - SAMIRA ALBUQUERQUE DE SOUSA - UFRNExterna à Instituição - RENATA MARQUES DE MELO - UNESP