Journal article
Influence of collagen cross-linkers addition in phosphoric acid on dentin biomodification and bonding of an etch-and-rinse adhesive
Dental materials, Vol.36(1), pp.E1-E8
01/01/2020
DOI: 10.1016/j.dental.2019.11.019
PMID: 31791738
Abstract
Objective. To investigate the effects of natural collagen cross-linkers incorporation in phosphoric acid etchant on dentin biomodification, microtensile bond strength (mu TBS) and nanoleakage (NL) of a two-step etch-and-rinse adhesive.
Methods. Experimental aqueous solution of 37% ortho-phosphoric acid were prepared with the addition of 2% biomodification agents: Lignin (LIG) from industrial paper production residue, Cardanol (CARD) from cashew-nut shell liquid, and Proanthocyanidin (PAC) from grape-seed extract. Negative control (NC) was acid solution without cross-linker whilst commercial control (CC) was Condac 37 gel (FGM). Dentin specimens were assayed by FTIR after 15 s etching to detect collagen cross-linking. Extracted third molars were used for mu TBS (n = 7) and fracture mode analysis of Optibond S (Kerr), tested after 24 h or 1000 thermal cycles. NL was surveyed by SEM. Statistical analysis was performed with two-way ANOVA and Tukey's test (p <0.05).
Results. FTIR confirmed cross-linking for all agents. mu TBS of CC was the highest (46.6 +/- 6.2 MPa), but reduced significantly after aging (35.7 +/- 5.2 MPa) (p < 0.001). LIG (30.6 +/- 3.7 MPa) and CARD (28.3 +/- 1.8 MPa) attained similar ii,TBS which were stable after aging (p > 0.05). Fracture mode was predominantly adhesive. At 24h, all groups showed presence of silver uptake in hybrid layer, except CARD. After aging, CARD- and LIG-treated specimens exhibited little amount of silver penetration. CC, PAC and NC showed gaps, great nanoleakage at hybrid layer and presence of water channels in adhesive layer.
Significance. Altogether, ortho-phosphoric acid incorporated with LIG and CARD promotes stable resin-dentin bond strength with minor nanoleakage after aging, thereby achieving therapeutic impact without additional clinical steps. (C) 2019 The Academy of Dental Materials. Published by Elsevier Inc. All rights reserved.
Details
- Title: Subtitle
- Influence of collagen cross-linkers addition in phosphoric acid on dentin biomodification and bonding of an etch-and-rinse adhesive
- Creators
- D. M. De-Paula - Universidade Federal do CearáD. Lomonaco - Universidade Federal do CearáA. M. P. Ponte - Paulo Picanco Sch Dent, Fortaleza, Ceara, BrazilK. E. Cordeiro - Paulo Picanco Sch Dent, Fortaleza, Ceara, BrazilM. M. Moreira - Univ Fed Ceara, Postgrad Program Dent, Fortaleza, Ceara, BrazilS. E. Mazzetto - Universidade Federal do CearáV. P. Feitosa - Paulo Picanco Sch Dent, Fortaleza, Ceara, Brazil
- Resource Type
- Journal article
- Publication Details
- Dental materials, Vol.36(1), pp.E1-E8
- Publisher
- Elsevier
- DOI
- 10.1016/j.dental.2019.11.019
- PMID
- 31791738
- ISSN
- 0109-5641
- eISSN
- 1879-0097
- Number of pages
- 8
- Grant note
- FUNCAP; Fundacao Cearense de Apoio ao Desenvolvimento Cientifico e Tecnologico (FUNCAP) Brazilian Ministry of Education and Science 001; 23038.006958/2014-96 / Coordenacao deAperfeicoamento de Pessoal de Nivel Superior - Brasil (CAPES); Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES) 407291/2018-0; 457931/2014-0 / CNPq; Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPQ)
- Language
- English
- Date published
- 01/01/2020
- Academic Unit
- Operative Dentistry
- Record Identifier
- 9984654471402771
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