Journal article
In Vitro Evaluation of Experimental Self-Adhesive Orthodontic Composites Used to Bond Ceramic Brackets
Materials, Vol.12(3), p.419
01/30/2019
DOI: 10.3390/ma12030419
PMCID: PMC6385121
PMID: 30704042
Abstract
The aim of this study was to evaluate the degree of conversion (DC), flexural strength (FS), and shear bond strength (SBS) of ceramic brackets bonded to enamel with experimental self-adhesive orthodontic composites. Functional monomers 10-methacryloyloxy-decyl-dihydrogen-phosphate (MDP) and glycerol-dimethacrylate-phosphate (GDMA-P) were used in experimental composites. They were compared to the same composite without an acidic monomer (negative control) and with enamel acid-etching prior to adhesive application (positive control). DC was evaluated by Raman micro-spectroscopy. Flexural three-point bending testing was performed in a universal testing machine. Ceramic brackets were bonded to bovine enamel and SBS was evaluated before and after 2000 thermal-cycles. Fracture patterns were surveyed with manual removal with specific pliers and analyzed by SEM. Statistics was performed using ANOVA and Tukey's test (p < 0.05). DC of the control composite was significantly higher (p < 0.001) than that of GDMA-P and MDP. FS showed no significant difference between composites (p = 0.451). Regarding adhesion, the positive control (8.47 +/- 0.88 MPa) and MDP (7.07 +/- 2.69 MPa) obtained higher overall results. The predominant fracture pattern of the positive control and MDP was mixed while it was adhesive for further groups. The MDP-containing orthodontic composite attained similar adhesion to a conventional three-step orthodontic bonding system, with a similar fracture pattern and mechanical properties. Nevertheless, the presence of acidic functional monomers reduced the DC.
Details
- Title: Subtitle
- In Vitro Evaluation of Experimental Self-Adhesive Orthodontic Composites Used to Bond Ceramic Brackets
- Creators
- Ana Carolina Costa - Univ Fed Ceara, Dept Restorat Dent, BR-60430355 Fortaleza, Ceara, BrazilVicente Saboia - Univ Fed Ceara, Dept Restorat Dent, BR-60430355 Fortaleza, Ceara, BrazilFelipe Marcal - Universidade Federal do CearáNara Sena - Univ Fed Ceara, Dept Restorat Dent, BR-60430355 Fortaleza, Ceara, BrazilDiego De Paula - Paulo Picanco Sch Dent, Div Res, BR-60325218 Fortaleza, Ceara, BrazilThyciana Ribeiro - Universidade Federal do CearáVictor Feitosa - Paulo Picanco Sch Dent, Div Res, BR-60325218 Fortaleza, Ceara, Brazil
- Resource Type
- Journal article
- Publication Details
- Materials, Vol.12(3), p.419
- Publisher
- Mdpi
- DOI
- 10.3390/ma12030419
- PMID
- 30704042
- PMCID
- PMC6385121
- ISSN
- 1996-1944
- eISSN
- 1996-1944
- Number of pages
- 10
- Grant note
- 23038.006958/2014-96 / CAPES; Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES) 457931/2014-0 / CNPq; Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPQ)
- Language
- English
- Date published
- 01/30/2019
- Academic Unit
- Operative Dentistry
- Record Identifier
- 9984655346502771
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