The effect of ionizing radiation on properties of fluoride-releasing restorative materials
Braz. oral res. (Online)
; 34: e005, 2020. tab, graf
Article
in En
| LILACS
| ID: biblio-1055521
Responsible library:
BR1.1
ABSTRACT
Abstract The purpose of this study was to evaluate the effect of ionizing radiation from high energy X-ray on fluoride release, surface roughness, flexural strength, and surface chemical composition of the materials. The study groups comprised five different restorative materials Beautifil II, GCP Glass Fill, Amalgomer CR, Zirconomer, and Fuji IX GP. Twenty disk-shaped specimens (8x2 mm) for fluoride release and 20 bar-shaped specimens (25 x 2x 2 mm) for flexural strength were prepared from each material. Each material group was divided into two subgroups irradiated (IR) and non-irradiated (Non-IR). The specimens from IR groups were irradiated with 1.8 Gy/day for 39 days (total IR = 70.2 Gy). The amount of fluoride released into deionized water was measured using a fluoride ion-selective electrode and ion analyzer after 24 hours and on days 2, 3, 7, 15, 21, 28, 35, and 39 (n = 10). The flexural strength was evaluated using the three-point bending test (n = 10). After the period of measurement of fluoride release, seven specimens (n = 7) from each group were randomly selected to evaluate surface roughness using AFM and one specimen was randomly selected for the SEM and EDS analyses. Data were analyzed with two-way ANOVA and Tukey tests (p = 0.05). The irradiation significantly increased fluoride release and surface roughness for Amalgomer CR and Zirconomer groups (p < 0.05). No significant change in flexural strength of the materials was observed after irradiation (p > 0.05). The ionizing radiation altered the amount of fluoride release and surface roughness of only Amalgomer CR and Zirconomer. The effect could be related to the chemical compositions of materials.
Key words
Full text:
1
Collection:
01-internacional
Database:
LILACS
Main subject:
Apatites
/
Radiation, Ionizing
/
Bisphenol A-Glycidyl Methacrylate
/
Composite Resins
/
Fluorides
/
Glass Ionomer Cements
Type of study:
Evaluation_studies
Language:
En
Journal:
Braz. oral res. (Online)
Journal subject:
ODONTOLOGIA
Year:
2020
Document type:
Article
Affiliation country:
Turkey
Country of publication:
Brazil