Dual resin cement knoop hardness after different activation modes through dental ceramics

Brazilian Dental Journal
Thiago Assunção ValentinoLourenço Correr-Sobrinho

Abstract

This study investigated the influence of ceramic compositions on Knoop Hardness Number (KHN) immediately and 24 h after polymerization and the effect of activation modes on the KHN of a resin cement. Ten Panavia F 2.0 resin cement discs were activated either directly using curing light, or chemically without light, or through 1.2-thick ceramic discs. The following ceramics were evaluated: Duceram, Cergogold, IPS Empress, IPS Empress 2, Procera, Cercon, In Ceram Alumina and In Ceram Zirconia. The KHN was obtained immediately and after 24-h testing time. Two-way ANOVA and Tukey's test were performed for statistical analysis (p<0.05). Direct activation showed higher KHN than activation through ceramics and chemical activation for both immediate and 24-h post activation. The KHN for 24-h post activation time was higher than that of the immediate post activation time except for the direct activation mode. The glass and di-silicate based ceramics showed higher KHN than alumina- and zirconia-based ceramics, immediately and after 24-h. The reinforced and opaque ceramics had the lowest KHN. The ceramic composition resulted in light attenuation, lower polymerization and lower KHN, and the 24-h testing time promoted an improvement of KHN ...Continue Reading

References

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Citations

Feb 26, 2011·Clinical Oral Investigations·Nicoleta Ilie, Alexander Simon
Feb 3, 2016·Dental Materials Journal·Su-Young LeeSung-Eun Yang
Dec 15, 2016·The Journal of Oral Implantology·Marcos Alexandre FadanelliFabiana Mantovani Gomes França
Dec 17, 2016·Brazilian Dental Journal·Amanda Mahmmad MushasheGisele Maria Correr
Aug 21, 2014·Journal of Applied Oral Science : Revista FOB·Luana Menezes de MendonçaRicardo Marins de Carvalho
Apr 27, 2011·Brazilian Dental Journal·Luciana Lira MeneghelAlcides Gonini Júnior
Jan 18, 2021·European Journal of Oral Sciences·Fernanda Brombila BlumentrittNoéli Boscato
Mar 31, 2021·Clinical Oral Investigations·Christie M Tafur-ZeladaJúlio C M Souza

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