Banca de DEFESA: ISABELA DANTAS TORRES DE ARAÚJO

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : ISABELA DANTAS TORRES DE ARAÚJO
DATE: 23/05/2024
TIME: 14:00
LOCAL: Departamento de Odontologia - Auditório
TITLE:

MODIFICATION OF A BULK FILL FLOW COMPOSITE RESIN WITH ACETONIC EXTRACT FROM POMEGRANATE PEEL

KEY WORDS:

Streptococcus mutans;  plant extracts;  composite resin;  surface properties.  colorimetry

PAGES: 28
BIG AREA: Ciências da Saúde
AREA: Odontologia
SUBÁREA: Clínica Odontológica
SUMMARY:

Introduction: Caries still constitutes a public health problem. Areas adjacent to restorations are often affected by caries. Even though composite resins are being studied and improved, they still do not have antimicrobial activity. Pomegranate peels are a potential resource for bioactive compounds such as phenolics, proanthocyanidins and flavonoids, presenting antioxidant activity and inhibitory effects against Gram-negative and Gram-positive bacteria. Objective: to modify the Opus Bulk Fill Flow composite resin with the acetone extract of pomegranate peel in different concentrations and evaluate the surface roughness and color change. Methodology: 5g of pomegranate peel was extracted using 100ml of 70% acetone solvent. After rotary evaporation, filtering and lyophilization of the extract, it was macerated, sieved and weighed at different contractions based on the minimum inhibitory concentration capable of inhibiting the growth of Streptococcus mutans. The Opus Bulk Fill Flow composite resin was modified with this extract concentrations in order to generate 5 groups of distinct concentrations: Control 0% (n=10), G1 12.5% (n=10), G2 25% (n=10 ), G3 50% (n=10) and G4 100% (n=10).  Roughness (Ra) and color difference (ΔE00) were subjected to normality tests and non-parametric data were subjected to the Kruskall Wallis test with Dunn's post-test using GraphPad Prism 8 and Microsoft Excel 2019 software. Results : It was found that the average color difference increased as the concentration of the extract in the modified resin increased (p<0.0001), as well as the modified resins became, visibly to the naked eye, a little more yellowish.  Surface roughness (Ra) did not show a statistically significant difference (p=0.0748). All groups presented average values similar to 0.06μm.  Conclusion: The addition of the acetone extract from pomegranate peel changed the color of the Opus Bulk Fill Flow composite resin as its concentration increased.  The surface roughness of all experimental and control groups was within the value expected in the literature (<0.2μm) with the aim of preventing adhesion of biofilm and microorganisms on the surface of the material. Further studies are recommended to verify whether this extract alters other mechanical properties of the fluid composite resin.

COMMITTEE MEMBERS:
Externa à Instituição - CLAUDIA TAVARES MACHADO - UNIFACEX
Externa ao Programa - 1247082 - DIANA FERREIRA GADELHA DE ARAUJO - nullPresidente - 2292784 - ISAUREMI VIEIRA DE ASSUNCAO
Externa ao Programa - 3138832 - MARIA REGINA MACEDO COSTA - nullExterno à Instituição - RODOLFO XAVIER DE SOUSA LIMA - UFPB