Degree of conversion of Filtek Silorane Adhesive System and Clearfil SE Bond within the hybrid and adhesive layer: An in situ Raman analysis

Chiara O Navarra; Milena Cadenaro; Steven R Armstrong; Julie Jessop; Francesca Antoniolli; Valter Sergo; Roberto Di Lenarda; Lorenzo Breschi

doi:10.1016/j.dental.2009.05.009

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Degree of conversion of Filtek Silorane Adhesive System and Clearfil SE Bond within the hybrid and adhesive layer: An in situ Raman analysis

Journal article

Peer reviewed

Degree of conversion of Filtek Silorane Adhesive System and Clearfil SE Bond within the hybrid and adhesive layer: An in situ Raman analysis

Chiara O Navarra, Milena Cadenaro, Steven R Armstrong, Julie Jessop, Francesca Antoniolli, Valter Sergo, Roberto Di Lenarda and Lorenzo Breschi

Dental materials, Vol.25(9), pp.1178-1185

2009

DOI: 10.1016/j.dental.2009.05.009

PMID: 19570569

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Abstract

To examine the degree of conversion (DC) of the adhesive interfaces created by Filtek Silorane Adhesive and Clearfil SE Bond using micro-Raman spectroscopy. The adhesives were applied on human dentin in accordance with manufacturer's instructions. Specimens were cut to expose the bonded interfaces to the micro-Raman beam (Ranishaw InVia; laser wl 785 nm). Raman spectra were collected along the dentin/self-etching primer/adhesive interface at 1 μm intervals. The relative intensities of bands associated with mineral (P–O functional group at 960 cm −1) and adhesive (C–C–O group at 605 cm −1) components within the bonded interface were used to detect monomer penetration into the dentin matrix and to calculate the degree of conversion (C C at 1640 cm −1 as reaction peak, C–C–O at 605 cm −1 as reference peak). Data were statistically analyzed with two-way ANOVA. DC of Filtek Silorane Adhesive was 69 ± 7% in the adhesive layer, increasing ( p < 0.05) to 93 ± 5% in the primer and 92 ± 9% in the hybrid layer. Clearfil SE Bond showed a DC of 83 ± 3% in the hybrid and 85 ± 3% in the adhesive layer. Thus, Filtek Silorane Adhesive showed a higher DC than Clearfil SE Bond in the hybrid layer ( p < 0.05), but a lower DC in the adhesive ( p < 0.05). As high DC is a fundamental pre-requisite for the stability of the bond over time, this study supports the hypothesis that optimal stability of Filtek Silorane Adhesive can be obtained. However, further research is needed to investigate the mechanical properties of the hybrid layer created by Filtek Silorane Adhesive and its long-term stability.

Degree of conversion

Silorane

Raman spectroscopy

Dentin bonding systems

Hybrid layer

Details

Title: Subtitle: Degree of conversion of Filtek Silorane Adhesive System and Clearfil SE Bond within the hybrid and adhesive layer: An in situ Raman analysis
Creators: Chiara O Navarra - Department of Biomedicine, University of Trieste, Trieste, Italy
Milena Cadenaro - Department of Biomedicine, University of Trieste, Trieste, Italy
Steven R Armstrong - Department of Operative Dentistry, University of Iowa, Iowa City, IA, USA
Julie Jessop - Department of Chemical & Biochemical Engineering, University of Iowa, Iowa City, IA, USA
Francesca Antoniolli - Department of Biomedicine, University of Trieste, Trieste, Italy
Valter Sergo - Department of Material and Natural Resources, University of Trieste, Italy
Roberto Di Lenarda - Department of Biomedicine, University of Trieste, Trieste, Italy
Lorenzo Breschi - Department of Biomedicine, University of Trieste, Trieste, Italy
Resource Type: Journal article
Publication Details: Dental materials, Vol.25(9), pp.1178-1185
Publisher: Elsevier Ltd
DOI: 10.1016/j.dental.2009.05.009
PMID: 19570569
ISSN: 0109-5641
eISSN: 1879-0097
Language: English
Date published: 2009
Academic Unit: Operative Dentistry; Chemical and Biochemical Engineering
Record Identifier: 9984065989602771

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