Journal article
Lack of Neutralization of 10-MDP Primers by Zirconia May Affect the Degree of Conversion of Dual-cure Resin Cement
Operative dentistry, Vol.46(1), pp.107-115
01/01/2021
DOI: 10.2341/18-189-L
PMID: 33882140
Abstract
Objective: To assess the effects of different concentrations of 10-methacryloyloxydecyl dihydrogen phosphate (10-MDP) included in experimental ceramic primers on the degree of conversion (DC) and microshear bond strength (mu SBS) of a dual-cure resin cement, and on the acidity neutralization potential of zirconia (ZrO2) in comparison to hydroxyapatite (HAp).
Methods: Experimental ceramic primers were formulated using 5 wt%, 10 wt%, 20 wt%, or 40 wt% 10-MDP as an acidic functional monomer and camphorquinone (CQ)/amine or 1-phenyl-1,2-propanedione (PPD) as a photoinitiator system. Clearfil Ceramic Primer (Kuraray Dental, Tokyo, Japan) was used as the commercial control. Micro-Raman spectroscopy was used to assess the DC of uncured and light-cured resin cements applied onto primer-treated ZrO2 surfaces. The mu SBS and pH of primers were assayed in a universal testing machine and by a digital pH meter (Tec-3MP; Tecnal, Piracicaba, Brazil), respectively. Statistical analysis was performed by one-way analysis of variance (ANOVA) and Tukey's test (p<0.05).
Results: DC was not affected until a concentration of 10% 10-MDP in CQ primer and 5% 10-MDP in PPD primer was reached, when compared with the positive control (p>0.05). Groups 10-MDP 5% in CQ and PPD primers showed the highest mu SBS compared with the positive control (p>0.05); however, higher concentrations of 10-MDP induced significant DC and mu SBS reduction (p<0.05). HAp neutralized 10-MDP primers, but ZrO2 provided higher acidity to the primers' pH.
Conclusion: 10-MDP monomer should be used in low concentrations in ZrO2 primers to avoid reduction of the polymerization and bond strength of resin cement.
Details
- Title: Subtitle
- Lack of Neutralization of 10-MDP Primers by Zirconia May Affect the Degree of Conversion of Dual-cure Resin Cement
- Creators
- D. M. De Paula - Universidade Federal do CearáA. D. Loguercio - Universidade Estadual de Ponta GrossaA. Reis - Universidad Cardenal Herrera CEUS. Sauro - Universidad Cardenal Herrera CEUA. H. Alves - Universidad Cardenal Herrera CEUP. R. Picanco - Universidad Cardenal Herrera CEUK. Yoshihara - Okayama University HospitalV. P. Feitosa - Universidad Cardenal Herrera CEU
- Resource Type
- Journal article
- Publication Details
- Operative dentistry, Vol.46(1), pp.107-115
- DOI
- 10.2341/18-189-L
- PMID
- 33882140
- NLM abbreviation
- Oper Dent
- ISSN
- 0361-7734
- eISSN
- 1559-2863
- Publisher
- Operative Dentistry Inc
- Number of pages
- 9
- Grant note
- 457931/2014-0 / CNPq; Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPQ) AUXPE 23038.006958/2014-96 / CAPES; Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES)
- Language
- English
- Date published
- 01/01/2021
- Academic Unit
- Operative Dentistry
- Record Identifier
- 9984655347202771
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