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Effect of the regional variability of dentinal substrate and modes of application of adhesive systems on the mechanical properties of the adhesive layer

AIM: This study assessed the effect of the dentin depth and the application mode on the hardness and elastic modulus of the adhesive layer. MATERIALS AND METHODS: Occlusal surfaces of 48 caries-free human third molars were removed, at two levels: Superficial and deep dentin. For each type of surface...

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Autores principales: Pupo, Yasmine Mendes, Michél, Milton Domingos, Gomes, Osnara Maria Mongruel, Lepienski, Carlos Maurício, Gomes, João Carlos
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Medknow Publications & Media Pvt Ltd 2012
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3339006/
https://www.ncbi.nlm.nih.gov/pubmed/22557810
http://dx.doi.org/10.4103/0972-0707.94580
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author Pupo, Yasmine Mendes
Michél, Milton Domingos
Gomes, Osnara Maria Mongruel
Lepienski, Carlos Maurício
Gomes, João Carlos
author_facet Pupo, Yasmine Mendes
Michél, Milton Domingos
Gomes, Osnara Maria Mongruel
Lepienski, Carlos Maurício
Gomes, João Carlos
author_sort Pupo, Yasmine Mendes
collection PubMed
description AIM: This study assessed the effect of the dentin depth and the application mode on the hardness and elastic modulus of the adhesive layer. MATERIALS AND METHODS: Occlusal surfaces of 48 caries-free human third molars were removed, at two levels: Superficial and deep dentin. For each type of surface, the test specimens were randomly divided into groups which underwent the application: A conventional two-step adhesive system (Adper™ Single Bond [SB]) and self-etch adhesives system (Adper™ SE Plus [SE] and AdheSE(®) [AD]). The adhesives applied were active or passive. Composite build-ups were constructed incrementally. The teeth were sectioned, embedded, and polished. The nanoindentation test was performed in the adhesive layer. The results were analyzed by ANOVA and Tukey tests. RESULTS: In the adhesive layer, the higher hardness (0.307 ± 0.006 GPa) and elastic modulus (4.796 ± 0.165 GPa) of SE were obtained in superficial dentin in passive application. The elastic modulus of SE (4.115 ± 0.098 GPa) was lowest in active application in superficial dentin. The active application significantly increased the hardness of the SB in the deep dentin (0.011 ± 0.314 GPa) compared the superficial dentin (0.280 ± 0.010 GPa). For the AD, only the mode of application was statistically significant (P=0.0041) for the hardness, active application (0.289 ± 0.015 GPa) being higher than passive application (0.261 ± 0.013 GPa) (P=0.0042) in deep dentin. CONCLUSION: The experimental results reveal that the mechanical properties were influenced for the application mode of adhesive systems and dentin depth.
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spelling pubmed-33390062012-05-03 Effect of the regional variability of dentinal substrate and modes of application of adhesive systems on the mechanical properties of the adhesive layer Pupo, Yasmine Mendes Michél, Milton Domingos Gomes, Osnara Maria Mongruel Lepienski, Carlos Maurício Gomes, João Carlos J Conserv Dent Original Article AIM: This study assessed the effect of the dentin depth and the application mode on the hardness and elastic modulus of the adhesive layer. MATERIALS AND METHODS: Occlusal surfaces of 48 caries-free human third molars were removed, at two levels: Superficial and deep dentin. For each type of surface, the test specimens were randomly divided into groups which underwent the application: A conventional two-step adhesive system (Adper™ Single Bond [SB]) and self-etch adhesives system (Adper™ SE Plus [SE] and AdheSE(®) [AD]). The adhesives applied were active or passive. Composite build-ups were constructed incrementally. The teeth were sectioned, embedded, and polished. The nanoindentation test was performed in the adhesive layer. The results were analyzed by ANOVA and Tukey tests. RESULTS: In the adhesive layer, the higher hardness (0.307 ± 0.006 GPa) and elastic modulus (4.796 ± 0.165 GPa) of SE were obtained in superficial dentin in passive application. The elastic modulus of SE (4.115 ± 0.098 GPa) was lowest in active application in superficial dentin. The active application significantly increased the hardness of the SB in the deep dentin (0.011 ± 0.314 GPa) compared the superficial dentin (0.280 ± 0.010 GPa). For the AD, only the mode of application was statistically significant (P=0.0041) for the hardness, active application (0.289 ± 0.015 GPa) being higher than passive application (0.261 ± 0.013 GPa) (P=0.0042) in deep dentin. CONCLUSION: The experimental results reveal that the mechanical properties were influenced for the application mode of adhesive systems and dentin depth. Medknow Publications & Media Pvt Ltd 2012 /pmc/articles/PMC3339006/ /pubmed/22557810 http://dx.doi.org/10.4103/0972-0707.94580 Text en Copyright: © Journal of Conservative Dentistry http://creativecommons.org/licenses/by-nc-sa/3.0 This is an open-access article distributed under the terms of the Creative Commons Attribution-Noncommercial-Share Alike 3.0 Unported, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Original Article
Pupo, Yasmine Mendes
Michél, Milton Domingos
Gomes, Osnara Maria Mongruel
Lepienski, Carlos Maurício
Gomes, João Carlos
Effect of the regional variability of dentinal substrate and modes of application of adhesive systems on the mechanical properties of the adhesive layer
title Effect of the regional variability of dentinal substrate and modes of application of adhesive systems on the mechanical properties of the adhesive layer
title_full Effect of the regional variability of dentinal substrate and modes of application of adhesive systems on the mechanical properties of the adhesive layer
title_fullStr Effect of the regional variability of dentinal substrate and modes of application of adhesive systems on the mechanical properties of the adhesive layer
title_full_unstemmed Effect of the regional variability of dentinal substrate and modes of application of adhesive systems on the mechanical properties of the adhesive layer
title_short Effect of the regional variability of dentinal substrate and modes of application of adhesive systems on the mechanical properties of the adhesive layer
title_sort effect of the regional variability of dentinal substrate and modes of application of adhesive systems on the mechanical properties of the adhesive layer
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3339006/
https://www.ncbi.nlm.nih.gov/pubmed/22557810
http://dx.doi.org/10.4103/0972-0707.94580
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