Cargando…
ADHESIVES WITH DIFFERENT PHS: EFFECT ON THE MTBS OF CHEMICALLY ACTIVATED AND LIGHT-ACTIVATED COMPOSITES TO HUMAN DENTIN
PURPOSE: To evaluate the bond strength between human dentin and composites, using two light-activated single-bottle total-etch adhesive systems with different pHs combined with chemically activated and light-activated-composites. The tested hypothesis was that the dentin bond strength is not influen...
Autores principales: | , , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Faculdade de Odontologia de Bauru da Universidade de São Paulo
2007
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4327427/ https://www.ncbi.nlm.nih.gov/pubmed/19089142 http://dx.doi.org/10.1590/S1678-77572007000400005 |
_version_ | 1782357076746436608 |
---|---|
author | Mallmann, André de Melo, Renata Marques Estrela, Verbênia Pelogia, Fernanda Campos, Laura Bottino, Marco Antonio Valandro, Luiz Felipe |
author_facet | Mallmann, André de Melo, Renata Marques Estrela, Verbênia Pelogia, Fernanda Campos, Laura Bottino, Marco Antonio Valandro, Luiz Felipe |
author_sort | Mallmann, André |
collection | PubMed |
description | PURPOSE: To evaluate the bond strength between human dentin and composites, using two light-activated single-bottle total-etch adhesive systems with different pHs combined with chemically activated and light-activated-composites. The tested hypothesis was that the dentin bond strength is not influenced by an adhesive system of low pH, combined with chemically activated or light-activated composites. MATERIAL AND METHOD: Flat dentin surfaces of twenty-eight human third molars were allocated in 4 groups (n=7), depending on the adhesive system: (One Step Plus-OS and Prime & Bond NT-PB) and composite (light-activated Filtek Z-100 [Z100] and chemically activated Bisfil 2B [B2B]). Each adhesive system was applied on acid-etched dentin and then one of the composites was added to form a 5 mm-high resin block. The specimens were stored in tap water (37°C/24 h) and sectioned into two axes, x and y. This was done with a diamond disk under coolant irrigation to obtain beams with a cross-section area of approximately 0.8 mm(2). Each specimen was then attached to a custom-made device and submitted to the microtensile test (1 mm.min(−1)). Data were analyzed using two-way ANOVA and Tukey’s tests (p<0.05). RESULTS: The anticipated hypothesis was not confirmed (p<0.0001). The bond strengths (MPa) were not statistically different between the two adhesive systems when light-activated composite was used (OS+Z100 = 24.7±7.1ª; PB+Z100 = 23.8±5.7ª). However, with use of the chemically activated composite (B2B), PB (7.8±3.6(b) MPa) showed significantly lower dentin bond strengths than OS (32.2±7.6ª). CONCLUSION: The low pH of the adhesive system can affect the bond of chemically activated composite to dentin. On the other hand, under the present conditions, the low pH did not seem to affect the bond of light-activated composites to dentin significantly. |
format | Online Article Text |
id | pubmed-4327427 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2007 |
publisher | Faculdade de Odontologia de Bauru da Universidade de São Paulo |
record_format | MEDLINE/PubMed |
spelling | pubmed-43274272015-04-16 ADHESIVES WITH DIFFERENT PHS: EFFECT ON THE MTBS OF CHEMICALLY ACTIVATED AND LIGHT-ACTIVATED COMPOSITES TO HUMAN DENTIN Mallmann, André de Melo, Renata Marques Estrela, Verbênia Pelogia, Fernanda Campos, Laura Bottino, Marco Antonio Valandro, Luiz Felipe J Appl Oral Sci Original Article PURPOSE: To evaluate the bond strength between human dentin and composites, using two light-activated single-bottle total-etch adhesive systems with different pHs combined with chemically activated and light-activated-composites. The tested hypothesis was that the dentin bond strength is not influenced by an adhesive system of low pH, combined with chemically activated or light-activated composites. MATERIAL AND METHOD: Flat dentin surfaces of twenty-eight human third molars were allocated in 4 groups (n=7), depending on the adhesive system: (One Step Plus-OS and Prime & Bond NT-PB) and composite (light-activated Filtek Z-100 [Z100] and chemically activated Bisfil 2B [B2B]). Each adhesive system was applied on acid-etched dentin and then one of the composites was added to form a 5 mm-high resin block. The specimens were stored in tap water (37°C/24 h) and sectioned into two axes, x and y. This was done with a diamond disk under coolant irrigation to obtain beams with a cross-section area of approximately 0.8 mm(2). Each specimen was then attached to a custom-made device and submitted to the microtensile test (1 mm.min(−1)). Data were analyzed using two-way ANOVA and Tukey’s tests (p<0.05). RESULTS: The anticipated hypothesis was not confirmed (p<0.0001). The bond strengths (MPa) were not statistically different between the two adhesive systems when light-activated composite was used (OS+Z100 = 24.7±7.1ª; PB+Z100 = 23.8±5.7ª). However, with use of the chemically activated composite (B2B), PB (7.8±3.6(b) MPa) showed significantly lower dentin bond strengths than OS (32.2±7.6ª). CONCLUSION: The low pH of the adhesive system can affect the bond of chemically activated composite to dentin. On the other hand, under the present conditions, the low pH did not seem to affect the bond of light-activated composites to dentin significantly. Faculdade de Odontologia de Bauru da Universidade de São Paulo 2007-08 /pmc/articles/PMC4327427/ /pubmed/19089142 http://dx.doi.org/10.1590/S1678-77572007000400005 Text en http://creativecommons.org/licenses/by-nc/3.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Original Article Mallmann, André de Melo, Renata Marques Estrela, Verbênia Pelogia, Fernanda Campos, Laura Bottino, Marco Antonio Valandro, Luiz Felipe ADHESIVES WITH DIFFERENT PHS: EFFECT ON THE MTBS OF CHEMICALLY ACTIVATED AND LIGHT-ACTIVATED COMPOSITES TO HUMAN DENTIN |
title | ADHESIVES WITH DIFFERENT PHS: EFFECT ON THE MTBS OF CHEMICALLY ACTIVATED AND LIGHT-ACTIVATED COMPOSITES TO HUMAN DENTIN |
title_full | ADHESIVES WITH DIFFERENT PHS: EFFECT ON THE MTBS OF CHEMICALLY ACTIVATED AND LIGHT-ACTIVATED COMPOSITES TO HUMAN DENTIN |
title_fullStr | ADHESIVES WITH DIFFERENT PHS: EFFECT ON THE MTBS OF CHEMICALLY ACTIVATED AND LIGHT-ACTIVATED COMPOSITES TO HUMAN DENTIN |
title_full_unstemmed | ADHESIVES WITH DIFFERENT PHS: EFFECT ON THE MTBS OF CHEMICALLY ACTIVATED AND LIGHT-ACTIVATED COMPOSITES TO HUMAN DENTIN |
title_short | ADHESIVES WITH DIFFERENT PHS: EFFECT ON THE MTBS OF CHEMICALLY ACTIVATED AND LIGHT-ACTIVATED COMPOSITES TO HUMAN DENTIN |
title_sort | adhesives with different phs: effect on the mtbs of chemically activated and light-activated composites to human dentin |
topic | Original Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4327427/ https://www.ncbi.nlm.nih.gov/pubmed/19089142 http://dx.doi.org/10.1590/S1678-77572007000400005 |
work_keys_str_mv | AT mallmannandre adhesiveswithdifferentphseffectonthemtbsofchemicallyactivatedandlightactivatedcompositestohumandentin AT demelorenatamarques adhesiveswithdifferentphseffectonthemtbsofchemicallyactivatedandlightactivatedcompositestohumandentin AT estrelaverbenia adhesiveswithdifferentphseffectonthemtbsofchemicallyactivatedandlightactivatedcompositestohumandentin AT pelogiafernanda adhesiveswithdifferentphseffectonthemtbsofchemicallyactivatedandlightactivatedcompositestohumandentin AT camposlaura adhesiveswithdifferentphseffectonthemtbsofchemicallyactivatedandlightactivatedcompositestohumandentin AT bottinomarcoantonio adhesiveswithdifferentphseffectonthemtbsofchemicallyactivatedandlightactivatedcompositestohumandentin AT valandroluizfelipe adhesiveswithdifferentphseffectonthemtbsofchemicallyactivatedandlightactivatedcompositestohumandentin |