Journal article
Dental adhesives and strategies for displacement of water/solvents from collagen fibrils
Dental materials, Vol.32(6), pp.723-731
06/2016
DOI: 10.1016/j.dental.2016.03.009
PMCID: PMC4867272
PMID: 27068741
Abstract
To evaluate the influence of temperature of evaporation in adhesive systems with different solvents on the apparent modulus of elasticity and mass change of macro-hybrid layers modified by proanthocyanidins (PACs).
Adhesive resin beams (A) from Single Bond Plus (SB), Excite (EX) and One Step Plus (OS) were prepared after solvent evaporation at 23°C or 40°C (n=12). Macro-hybrid layers (M) (n=12) were prepared using demineralized dentin beams sectioned from extracted human third molars. The demineralized dentin specimens were infiltrated with each one of the three adhesive systems at 23°C or 40°C; with or without prior dentin treatment with PACs for 10min. The apparent modulus of elasticity (E) and mass change (Wmc, %) of adhesives beams and resin-infiltrated specimens were assessed in dry and wet conditions after immersion in water (24h, 1, 3 and 6 months). The E was statistically analyzed by Tukey–Kramer test and the Wmc, % by Kruskal Wallis, and Dunn (α=0.05).
Solvent evaporation at 40°C resulted in higher E values for adhesive resin beams at all storage conditions, regardless of the adhesive system (p<0.05). Increased mass loss (3 months: −0.01%; 6 months: −0.05%) was observed in One Step resin beams (p≤0.05). In the macro-hybrid layer models the pretreatment with PACs along with solvent evaporation at 40°C increased E and decreased the Wmc, % (3 months: −2.5; 6 months: 2.75%) for adhesives evaluated over time (p<0.05). No significant differences in ratio (resin/dentin) were found for the macro-hybrid layers (p>0.05).
Improved solvent evaporation at higher temperature, and increased collagen cross-linking induced by PACs, enhanced the mechanical properties resulting in highly stable macro-hybrid layers over 6 months storage.
Details
- Title: Subtitle
- Dental adhesives and strategies for displacement of water/solvents from collagen fibrils
- Creators
- Larissa Sgarbosa de Araújo Matuda - Universidade Estadual de Campinas (UNICAMP)Giselle Maria Marchi - Universidade Estadual de Campinas (UNICAMP)Thaiane Rodrigues Aguiar - University of Illinois at ChicagoAriene Arcas Leme - University of Illinois at ChicagoGláucia M.B. Ambrosano - Universidade Estadual de Campinas (UNICAMP)Ana Karina Bedran-Russo - University of Illinois at Chicago
- Resource Type
- Journal article
- Publication Details
- Dental materials, Vol.32(6), pp.723-731
- Publisher
- Elsevier Ltd
- DOI
- 10.1016/j.dental.2016.03.009
- PMID
- 27068741
- PMCID
- PMC4867272
- ISSN
- 0109-5641
- eISSN
- 1879-0097
- Grant note
- DOI: 10.13039/501100001807, name: FAPESP, award: 2012/08944-5; name: NIH/NIDCR, award: DE0214040
- Language
- English
- Date published
- 06/2016
- Academic Unit
- Operative Dentistry
- Record Identifier
- 9984367743902771
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