Influence of medium-translucency monolithic zirconia thicknesses and light-curing time on the polymerization of dual-cure resin cements
Braz. j. oral sci
; 22: e231336, Jan.-Dec. 2023. ilus
Article
em En
| LILACS, BBO
| ID: biblio-1442820
Biblioteca responsável:
BR218.1
ABSTRACT
Aim:
To investigate and compare the effects of different thicknesses of medium-translucency monolithic zirconia and light curing times on the polymerization of two types of dual-cured resin cement.Methods:
A total of 200 cement specimens were prepared from TheraCem and RelyX U200 cement. The specimens were divided into 5 groups Group I, without interposing zirconia; Group II, 0.50 mm thickness; Group III, 1.00 mm; Group IV, 1.50 mm; and Group V, 2.00 mm thickness. Each group was subdivided into (1) RelyX U200 and (2) TheraCem. Each subgroup was subdivided according to the light-curing time into (a) 20 s and (b) 40 s (n =5). The polymerization was tested using Fourier-transform infrared (FTIR) spectroscopy and a Vickers microhardness tester. The data were statistically analyzed using ANOVA, an independent sample t-test, and Tukey's test at a significance level of 0.05.Results:
The control group had the highest values of DC and VMH, followed by 0.50, 1.00, and 1.50 mm, respectively, while the 2.00 mm group showed the lowest values. The specimens irradiated for 40 s had greater DC and VMH than those irradiated for 20 s. RelyX U200 revealed higher values for both parameters compared to TheraCem cement.Conclusion:
The polymerization of selfadhesive cement depends on the thickness of the monolithic zirconia, the light curing time, and the composition of the cement. The cement should be irradiated for a longer period than recommended to overcome the light attenuation of zirconia. TEGDMA-based self-adhesive cement showed a higher DC and VMH than BISGMA-based cementAssuntos
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
BBO
/
LILACS
Assunto principal:
Zircônio
/
Espectroscopia de Infravermelho com Transformada de Fourier
/
Cimentos de Resina
/
Polimerização
Idioma:
En
Revista:
Braz. j. oral sci
Assunto da revista:
ODONTOLOGIA
Ano de publicação:
2023
Tipo de documento:
Article
País de afiliação:
Iraque
País de publicação:
Brasil