Banca de DEFESA: BARBARA BEATRIZ TEIXEIRA LIMA CARDOSO DE SOUZA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : BARBARA BEATRIZ TEIXEIRA LIMA CARDOSO DE SOUZA
DATE: 20/07/2023
TIME: 08:00
LOCAL: Departamento de Odontologia
TITLE:

EFFECT OF XYLITOL INCORPORATION ON THE SURFACE HARDNESS OF A LOW VISCOSITY BULK FILL COMPOSITE

KEY WORDS:

Xylitol; Antimicrobial Agents; Dental Caries; Composite Resin.

PAGES: 32
BIG AREA: Ciências da Saúde
AREA: Odontologia
SUMMARY:

Introduction: In view of the need for improved longevity of restorations, the development of antimicrobial resins has become necessary. Xylitol, a natural and biocompatible antimicrobial compound, may be a potential additive to include this property in a flowable bulk fill resin without compromising its integrity. Objective: To evaluate which xylitol concentration (0% or control; 2.5%; 5%) is optimal to develop an antimicrobial resin from a commercial flowable bulk fill resin (Tetric N-Flow Bulk Fill, Ivoclar Vivadent, Schaan, Liechtenstein) without modifying its surface microhardness. Methodology: 3 groups (n=12) were obtained by changing the xylitol concentration (0% or control; 2.5%; 5%). To obtain the experimental resins, xylitol powder was incorporated into the flowable resin by manual spatulation for 1 min in a darkroom. Based on an acrylic mold, 5 mm diameter disks were made by curing of a single increment with a 1400 mW/cm² irradiance LED device (Bluephase, Ivoclar Vivadent). The disks were subjected to Vickers microhardness test (HMV-2, Shimadzu, Tokyo, Japan) on the upper side. Statistical analysis was performed using one-way ANOVA and Tukey's test for comparison between groups (p < 0.05). Results: The 5% xylitol group showed lower mean surface microhardness when compared to the 0% and 2.5% groups. Conclusion: Xylitol negatively affected restoration integrity only when a 5% concentration was used.

COMMITTEE MEMBERS:
Presidente - 2042290 - BONIEK CASTILLO DUTRA BORGES
Interna - 2292784 - ISAUREMI VIEIRA DE ASSUNCAO
Externo à Instituição - RODOLFO XAVIER DE SOUSA LIMA - UnP