Banca de QUALIFICAÇÃO: JOSE MONTEIRO DOS SANTOS FILHO

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : JOSE MONTEIRO DOS SANTOS FILHO
DATE: 14/12/2024
LOCAL: Recife
TITLE:

Evaluation  of Physical parameters in blue-stained polyester strips for use in dental restorations

KEY WORDS:

Keywords: Dental Curing Lights, Efficiency, Ergonomics, Operative Dentistry,
Polymerization, Temperature

PAGES: 40
BIG AREA: Ciências da Saúde
AREA: Odontologia
SUMMARY:

The influence of the pigmentation of polyester strips on physical parameters, related
to the photopolymerization process, of a nano-hybrid composite resin was evaluated.
Colored polyester strips, transparent strips and polypropylene films were used for
comparison purposes, divided into the following groups: Group 1 (Negative control) -
absence of strips; Group 2 (Positive control) - transparent strip; Group 3-
Polypropylene; Group 4 - blue pigmentation (#4); Group 5 - blue pigmentation (#5);
Group 6 - prefabricated strip (Contoured Anterior Matrix). Tests were carried out
regarding the intensity of light transmitted by the strips, absorption spectrum,
temperature transmitted during polymerization and polymer conversion rate. When
measuring light intensity, the strips were exposed to the photopolymerizer on the
platform of a radiometer, whose intensity was obtained in mW/cm2. For the
temperature and conversion rate test, specimens were made in composite resin (?)
from an acrylic resin matrix using the tested strips; A thermographic camera was
used during the polymerization to measure the temperature and the Conversion Rate
analyzes were carried out using Fourier Transform Infrared Spectroscopy (FTIR).
The results were favorable for Groups 3 and 4, with a significant difference in light
intensity and degree of polymer conversion between the groups and a reduction in
the temperature transmitted during polymerization. Based on the results,
polypropylene strips proved to be viable in replacing transparent polyester strips,
however there are limits to the degree of saturation of the pigment so that there is no
influence of color on the photopolymerization parameters.

COMMITTEE MEMBERS:
Interna - 2250539 - BRUNA DE CARVALHO FARIAS VAJGEL
Interna - 3496161 - JULIANA RAPOSO SOUTO MAIOR COSTA
Externo ao Programa - 1212122 - CLAUDIO HELIOMAR VICENTE DA SILVA - UFPE