Banca de QUALIFICAÇÃO: DAYANNE REGINA BARROS DE LIMA SILVA

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : DAYANNE REGINA BARROS DE LIMA SILVA
DATE: 26/03/2024
LOCAL: Recife-PE
TITLE:

INFLUENCE OF HYDROGEN PEROXIDE-BASED RINSES ON COLOR CHANGE AND SURFACE ROUGHNESS OF COMPOSITE RESIN

KEY WORDS:

Composite Resins; Hydrogen Peroxide; Bleaching Agents; Surface
Properties.

PAGES: 34
BIG AREA: Ciências da Saúde
AREA: Odontologia
SUMMARY:

Composite resins represent aesthetic materials undergoing technological
advancements to enhance their physical and mechanical attributes, focusing on
color, smoothness, and translucency. However, modifications in their composition
may arise due to extrinsic factors, such as the influence of mouthwashes. The
primary objective of this investigation was to assess the in vitro impact of
mouthwashes on the alteration of color and surface roughness in distinct composite
resins. A mount of 120 specimens (n=10/subgroup) were manufactured and shaped
into discs using a metal matrix measuring 5mm in diameter and 2mm in thickness.
These specimens originated from four diverse brands of composite resin: NT
Premium (NT), Ultrafill Resin (UL), TPH Spectrum Resin (TPH), and Herculite Classic
Resin – Kerr (HR). Specimens derived from each composite resin were subjected to
immersion in two types of mouth rinses (Listerine Whitening and Colgate Luminous
White) and distilled water (as a control). The resin discs were immersed in
mouthwashes for 12 hours, equivalent to one year of daily use for 2 minutes. Color
evaluation was conducted using a spectrophotometer, and roughness assessment
was performed using a profilometer at two distinct time points: pre- and post-
immersion in the mouthwashes. The nanohybrid composite resin (NT Premium)
exhibited heightened color stability with diverse immersion substances, whereas the
nanoparticulate composite resin demonstrated diminished color stability. Colgate
Luminous White and Listerine Whitening mouthwashes induced chromatic staining
alterations in the resin, opposed to whitening. Consequently, the sustained use of
mentioned mouthwashes may result in staining of the resins, with only NT Premium
resin showing no substantial alteration in roughness.

COMMITTEE MEMBERS:
Interna - 3496161 - JULIANA RAPOSO SOUTO MAIOR COSTA
Externa ao Programa - 2322139 - HILCIA MEZZALIRA TEIXEIRA - UFPEExterna ao Programa - 3377347 - RENATA PEDROSA GUIMARAES - UFPE