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Somacal DC, Bellan MC, Monteiro MSG, de Oliveira SD, Bittencourt HR, Spohr AM. Effect of gastric acid on the surface roughness and bacterial adhesion of bulk-fill composite resins. Braz Dent J 2022; 33:94-102. [PMID: 36477970 PMCID: PMC9733363 DOI: 10.1590/0103-6440202205140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Accepted: 10/07/2022] [Indexed: 12/13/2022] Open
Abstract
The purpose of this in vitro study was to evaluate the effect of gastric acid on the surface roughness and biofilm formation of bulk-fill composite resins. Twenty-seven samples of each composite resin were obtained: G1: Filtek Z250 XT (Z250), G2: Filtek Bulk Fill (FTK), G3: Tetric N-Ceram Bulk Fill (TTC), and G4: Aura Bulk Fill (AUR). The samples were quantitatively analyzed for surface roughness (Ra) using a roughness tester (n=15) and for biofilm formation (Cn) by the counting of colony-forming units (CFUs/mL) (n=9) in three different moments: after polishing (Ra0 and Cn0), after gastric acid immersion (Ra1 and Cn1), and after gastric acid and simulated tooth brushing (Ra2 and Cn2). Qualitative analysis through surface topography (n=3) was evaluated by scanning electron microscopy (SEM). Ra values were subjected to two-way repeated measures ANOVA, followed by Tukey's test. Cn values were subjected to Kruskal-Wallis analysis, followed by multiple comparisons analysis (α=0.05). Z250 and FTK showed significant increases in surface roughness at Ra1. There were fewer CFUs/mL on TTC and AUR in relation to those of Z250 and FTK for Cn0, Cn1 and Cn2. The SEM images showed that gastric acid increased the formation of cracks, exposure of fillers and micro cavities for all composite resins. After tooth brushing, the topographical changes were more evident but did not influence biofilm formation. The gastric acid promoted both degradation of the surfaces and bacterial adhesion for all composite resins.
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Affiliation(s)
- Deise Caren Somacal
- Department of Restorative Dentistry, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Mariá Cortina Bellan
- Department of Restorative Dentistry, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Marina Silveira Gregis Monteiro
- Department of Immunology and Microbiology, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Silvia Dias de Oliveira
- Department of Immunology and Microbiology, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Hélio Radke Bittencourt
- Department of Statistics, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Ana Maria Spohr
- Department of Restorative Dentistry, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
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Bellan MC, da Cunha P, Colombino A, Bittencourt HR, Mota EG, Borges GA, Spohr AM. Retention of Manually or CAD/CAM-customized Fiberglass Posts Luted to Enlarged Root Canals with Different Resin Cements. Oper Dent 2022; 47:449-460. [PMID: 35917252 DOI: 10.2341/21-094-l] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/06/2021] [Indexed: 11/23/2022]
Abstract
The aim of this laboratory study was to evaluate the pull-out force of a prefabricated fiberglass post (PP), relined fiberglass post (RP), or milled fiberglass post (MP) luted with Multilink N (MN), RelyX Unicem 2 (RXU2) or RelyX Ultimate (RU) to enlarged root canals. The thickness of the resin cements and the presence of voids in the resin cement film were observed. The root canals of 90 bovine incisors were enlarged, endodontically treated, and randomly divided into 9 groups (n=10) according to the post type and resin cement. The specimens were scanned using micro-CT to analyze the thickness of the resin cement and the presence of voids. The specimens were submitted to mechanical cyclic loading (500,000 cycles at 50 N load) and subjected to pull-out force testing. Two-way ANOVA and Tukey's test analyzed the pull-out force and resin cement thickness data. Kruskal-Wallis and Bonferroni tests analyzed the void scores. The interaction between factors (post x resin cement) was significant (p=0.0001) for the pull-out force. Higher pull-out forces were obtained for RP and MP compared to PP. The post factor was significant (p=0.0001) for resin cement thickness, which was higher for PP (1054 μm), followed by MP (301 μm) and RP (194 μm). More void formation occurred for PP, being less for RP, differing significantly among the posts. Post customization (RP and MP) decreased resin cement thickness and void formation, favoring a higher pull-out force. Resin cements requiring an adhesive application (MN and RU) favored higher pull-out force than self-adhesive resin cement (RXU2).
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Affiliation(s)
- M C Bellan
- Mariá Cortina Bellan, DDS, MS, PhD, Department of Restorative Dentistry, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Pfjs da Cunha
- Patrícia Fernandes Jerzewski Sotero da Cunha, DDS, MsC, Private Practice, Porto, Alegre, Brazil
| | - Acl Colombino
- Ana Caroline Lima Colombino, DDS, Department of Restorative Dentistry, Uberaba University,Uberaba, Brazil
| | - H R Bittencourt
- Hélio Radke Bittencourt, MsC, PhD, Polytechnic School, Pontifical Catholic of Rio Grande do Sul, Porto Alegre, Brazil
| | - E G Mota
- Eduardo Gonçalves Mota, DDS, MS, PhD, Department of Restorative Dentistry, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Brazil
| | - G A Borges
- Gilberto Antonio Borges, DDS, MS, PhD, Department of Restorative Dentistry, School of Dentistry, Uberaba University, Uberaba, Brazil
| | - A M Spohr
- *Ana Maria Spohr, DDS, MS, PhD, Pontifical Catholic University of Rio Grande do Sul Porto Alegre, Rio Grande do Sul, Brazil
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da Cunha PFJS, Tavares JG, Spohr AM, Bellan MC, Bueno CH, Cardoso LI. Examining the effects of acid etching duration on the bond strength between two CAD/CAM materials and one composite resin. Odontology 2021; 110:113-119. [PMID: 34363147 DOI: 10.1007/s10266-021-00644-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Accepted: 07/21/2021] [Indexed: 11/29/2022]
Abstract
This study aimed to evaluate the effect of three hydrofluoric acid (HF) etching periods on the micro-tensile bond strength between two CAD-CAM ceramic systems [Vita Suprinity (VS) and feldspathic CEREC blocs (CB)] and a composite resin. The ceramics were categorized into six groups based on the surface conditioning protocol used, as follows: G1: CB-HF 5% for 20 s; G2: CB-HF 5% for 40 s; G3: CB-HF 5% for 60 s; G4: VS-HF 5% for 20 s; G5: VS-HF 5% for 40 s; G6: VS-HF 5% for 60 s. Scotchbond Universal was applied onto the pretreated ceramic surfaces and covered with Filtek Z350 XT composite resin. After 24 h, the specimens were cut into microbars (n = 16) and a micro-tensile bond strength test (μTBS) was carried out. An optical microscope was used to examine the fractured microbars. The results showed statistically significant differences between the factors tested (p < 0.01). Moreover, the mean MPa of G1(17.27), G2(13.03), G3(12.82), G4(15.83), G5(21.66), and G6(14.50) was seen to significantly differ. The predominant failure type observed was adhesive, and all three periods of HF etching produced satisfactory bonding between the composite resin and CB. An etching time of 40 s provided the highest μTBS value for VS.
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Affiliation(s)
| | - Julieta Gomes Tavares
- Pontifícia Universidade Católica Do Rio Grande Do Sul (PUCRS) School of Dentistry, Av. Ipiranga, 6681-Building 6, Porto Alegre, Rio Grande Do Sul, 90619-900, Brazil
| | - Ana Maria Spohr
- Pontifícia Universidade Católica Do Rio Grande Do Sul (PUCRS) School of Dentistry, Av. Ipiranga, 6681-Building 6, Porto Alegre, Rio Grande Do Sul, 90619-900, Brazil
| | - Mariá Cortina Bellan
- Pontifícia Universidade Católica Do Rio Grande Do Sul (PUCRS) School of Dentistry, Av. Ipiranga, 6681-Building 6, Porto Alegre, Rio Grande Do Sul, 90619-900, Brazil
| | - Caroline Hoffmann Bueno
- Pontifícia Universidade Católica Do Rio Grande Do Sul (PUCRS) School of Dentistry, Av. Ipiranga, 6681-Building 6, Porto Alegre, Rio Grande Do Sul, 90619-900, Brazil
| | - Laura Irgang Cardoso
- Pontifícia Universidade Católica Do Rio Grande Do Sul (PUCRS) School of Dentistry, Av. Ipiranga, 6681-Building 6, Porto Alegre, Rio Grande Do Sul, 90619-900, Brazil.
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Giacomini C, Maurina R, Tomazoni F, Bellan MC, Alessandretti R, Galafassi D. Resistência da união de restaurações confeccionadas com sistemas adesivos universais em dentes acometidos por erosão ácida. JOI 2019. [DOI: 10.18256/2238-510x.2019.v8i1.3067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Objetivos: Avaliar a resistência adesiva de diferentes sistemas adesivos universais em esmalte e dentina erodidos. Métodos: As unidades experimentais foram compostas por 30 fragmentos de esmalte bovino e 30 fragmentos de dentina bovina divididos aleatoriamente em três grupos experimentais de acordo com os sistemas adesivos universais utilizados (n = 10): Single Bond Universal (3M ESPE), Peak Universal (Ultradent) e Ambar Universal (FGM). Previamente as restaurações, os fragmentos de esmalte e dentina foram submetidos à desafio erosivo em ácido cítrico a 0,3% (pH = 2,6) durante cinco minutos, quatro vezes por dia por cinco dias. Um cilindro de resina composta (Forma, Ultradent) com 2mm de diâmetro foi construído em cima de cada fragmento. A resistência ao cisalhamento foi avaliada em máquina de ensaio universal (1mm/min). Os valores obtidos de resistência da união (MPa) foram analisados por ANOVA dois fatores e teste de Bonferroni (α=0,05). Resultados: Não houve diferença significativa entre os sistemas adesivos testados no mesmo substrato. O esmalte apresentou maiores valores de resistência da união que a dentina. Houve predomínio da falha coesiva em resina no esmalte e falha adesiva na dentina. Conclusão: Os sistemas adesivos universais testados apresentaram resistência adesiva semelhantes entre si dentro do mesmo substrato erodido.
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Maurina R, Giacomini C, Tomazoni F, Bellan MC, Alessandretti R, Galafassi D. Comparação da resistência de união ao cisalhamento de dois diferentes sistemas adesivos: estudo in vitro. JOI 2019. [DOI: 10.18256/2238-510x.2019.v8i1.3065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Objetivos: O presente estudo buscou avaliar a resistência de união ao cisalhamento de dois sistemas adesivos aplicados em diferentes quantidades de camadas em amostras de esmalte e dentina bovina. Métodos: Os fatores estudados foram os sistemas adesivos em dois níveis: Single Bond Universal e Single Bond 2. As amostras experimentais foram compostas por 30 fragmentos de esmalte bovino (n=5) e 30 fragmentos de dentina bovina (n=5) divididos aleatoriamente em 2 grupos experimentais de esmalte e dois grupos de dentina, sendo esses subdivididos em 3 modos de aplicação do sistema adesivo em 1, 2 ou 3 camadas. Resultados: Os adesivos Single Bond 2 e Single Bond Universal, quando aplicados em 1 ou 3 camadas em dentina ou esmalte apresentaram similaridade estatística (p= 0,8726). Já quando comparamos o sistema adesivo Single Bond 2 e Single Bond Universal em substrato dentinário a aplicação de 2 camadas do sistema adesivo implicam em aumento da resistência adesiva estatisticamente significante (p=0,000) para o grupo Single Bond Universal aplicado em dentina. Conclusão: O adesivo Single Bond Universal apresentou melhor resistência adesiva que o adesivo Single Bond 2 quando aplicados em duas camadas em substrato dentina. Para o substrato esmalte, ambos os sistemas adesivos são efetivos independente do número de camadas aplicadas.
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Bellan MC, Cunha PFJSD, Tavares JG, Spohr AM, Mota EG. Microtensile bond strength of CAD/CAM materials to dentin under different adhesive strategies. Braz Oral Res 2017; 31:e109. [PMID: 29267670 DOI: 10.1590/1807-3107bor-2017.vol31.0109] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Accepted: 11/23/2017] [Indexed: 11/21/2022] Open
Affiliation(s)
- Mariá Cortina Bellan
- Pontifícia Universidade Católica da Universidade Federal do Rio Grande do Sul – PUC-RS, Brazil
| | | | - Julieta Gomes Tavares
- Pontifícia Universidade Católica da Universidade Federal do Rio Grande do Sul – PUC-RS, Brazil
| | - Ana Maria Spohr
- Pontifícia Universidade Católica da Universidade Federal do Rio Grande do Sul – PUC-RS, Brazil
| | - Eduardo Gonçalves Mota
- Pontifícia Universidade Católica da Universidade Federal do Rio Grande do Sul – PUC-RS, Brazil
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