Microtensile bond strength of a resin cement to feldpathic ceramic after different etching and silanization regimens in dry and aged conditions

Brentel, Aline Scalone; Özcan, Mutlu; Valandro, Luiz Felipe; Alarça, Lilian Guimarães; Amaral, Rodrigo de Souza; Bottino, Marco Antônio

doi:10.1016/j.dental.2006.11.011

Cited by 162 publications

(157 citation statements)

References 22 publications

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“…In this condition, a significant reduction in bond strength occurred in the groups in which silane was applied. These results are corroborated by the study of Özcan et al [13], in which it was related that storage in distilled water is potentially harmful to the adhesive bond between the ceramic surface and silane; and by the study of Brentel et al [14], who suggested that silanized bond interfaces appear to be unstable in wet conditions. The lowest shear bond strength in this study was found in the group etched with phosphoric acid, irrespective of the time interval of storage in distilled water.…”

Section: Discussionsupporting

confidence: 80%

“…This result is due to its capacity to create the link Orthodontic shear bond strength | Guimarães et al between the silica in porcelain and the organic groups of the bonding resin, forming a bond between the two materials [9]. In the present study, simulation of the intraoral conditions of humidity and temperature was proposed, by means of storing the sample in distilled water for 150 days at a temperature of 37 ºC, according to previously published methodology [13,14]. In this condition, a significant reduction in bond strength occurred in the groups in which silane was applied.…”

Section: Discussionmentioning

confidence: 99%

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Orthodontic shear bond strength to porcelain surface in wet conditions

Guimarães¹,

Cocco

Bueno

et al. 2016

Rev. Odonto Ciênc. (Online)

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Objective: To evaluate the shear bond strength of orthodontic accessories bonded to a porcelain surface after storage in water. Methods: One-hundredand-twenty feldspathic porcelain discs were divided into 4 groups, according to the surface treatment: Group 1 -37% phosphoric acid etching; Group 2 -10% fluorhydric acid; Group 3 -37% phosphoric acid and silane application; Group 4 -10% fluorhydric acid and silane application. After the accessories were bonded, the sample was divided into two subgroups, according to the time interval of storage in distilled water: Control -24 hours; and Test -150 days. Shear bond strength was determined using a universal test machine, and failure type was verified by scanning electron microscopy. Results: In the test groups there was reduction in shear bond strength, particularly when silane was used. Test Groups 2 and 4 presented shear bond strength values within those proposed as adequate for orthodontic bonding. Groups 1 and 3 presented adhesive failures between porcelain and resin, whereas in Groups 2 and 4 cohesive failures in porcelain were recorded. Conclusion: Storage in water for 150 days decreased the bond strength at silanized interfaces. Fluorhydric acid etching generates adequate bond strength in wet conditions, however, increases the fracture rate in porcelain.Key words: Shear strength; Dental porcelain; Dental bonding; Orthodontics Resistência ao cisalhamento de colagem ortodôntica em superfície de porcelana em condições úmidas resumo RESUMO Objetivo: Avaliar resistência ao cisalhamento da colagem de acessórios ortodônticos a superfície de porcelana após armazenamento em água. Metodologia: Cento e vinte discos de porcelana feldspática foram divididos em 4 grupos, de acordo com o tratamento de superfície: Grupo 1 -condicionamento com ácido fosfórico a 37%; Grupo 2 -ácido fluorídrico 10%; Grupo 3 -ácido fosfórico 37% e silano; Grupo 4 -ácido fluorídrico 10% e silano. Após a colagem dos acessórios, a amostra foi dividida em dois subgrupos, de acordo com o tempo de armazenamento em água destilada: Controle -24 horas; e Teste -150 dias. A resistência ao cisalhamento foi determinada utilizando-se uma máquina de ensaios universal, e o tipo de falha após a descolagem através de microscópio eletrônico de varredura. Resultados: Nos grupos teste houve redução na resistência ao cisalhamento, particularmente quando o silano foi utilizado. Grupos Teste 2 e 4 apresentaram valores de resistência ao cisalhamento dentro daqueles propostos como adequados para colagem ortodôntica. Grupos 1 e 3 apresentaram falhas adesivas entre porcelana e resina, enquanto nos grupos 2 e 4 falhas coesivas em porcelana foram averiguadas. Conclusão: Armazenamento em água por 150 dias diminui a força de adesão em interfaces silanizadas. Condicionamento com ácido fluorídrico gerou força de adesão adequada em condições úmidas; entretanto, aumentou a taxa de fratura em porcelana.Palavras-chave: Resistência ao cisalhamento; Porcelana dentária; Colagem dentária; Ortodontia 60Rev Odonto Cienc 2016;31(2):5...

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Section: Discussionsupporting

confidence: 80%

Section: Discussionmentioning

confidence: 99%

Orthodontic shear bond strength to porcelain surface in wet conditions

Guimarães¹,

Cocco

Bueno

et al. 2016

Rev. Odonto Ciênc. (Online)

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“…This suggested that HF etching might well produce a more reliable and consistent result but this has not been confirmed, as the sample size of these studies was too small [100,102].…”

Section: Acidulated Phosphate Fluoridementioning

confidence: 76%

“…For this reason, some studies questioned whether 1.23% acidulated phosphate fluoride gels might serve as a safe and effective substitute for etching ceramic surfaces to bond composite resin to silanized ceramics [99][100][101]. It was concluded that 1.23% acidulated phosphate fluoride gels can be substituted for 9.5% hydrofluoric gels as prolonged etching times were required with the lower concentrations of hydrofluoric acid [102]. However, the specimens etched with 4% acidulated phosphate fluoride gel, showed a wider statistical spread than the ones etched with 9.6% HF.…”

Section: Acidulated Phosphate Fluoridementioning

confidence: 99%

Possible hazardous effects of hydrofluoric acid and recommendations for treatment approach: a review

2011

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Hydrofluoric acid (HF) is commonly used for conditioning the glass ceramics either prior to cementation or for intraoral repair in prosthetic and restorative dentistry. The present study offers a review of chemical properties of HF used, highlight the possible hazardous effects of this agent, and to recommend the treatment approach for potential risks. Available published information documented in PubMed, Medline, and Picarta literature databases was reviewed. Additional information was derived from scientific reports, medical and chemical textbooks, handbooks, product information, manufacturers' instructions, Internet web sites of the HF manufacturers. No report was found on the incidence of the hazardous effects of HF in dentistry. Reports from other fields presented incidences of acute and chronic symptoms in exposure to HF. While acute symptoms include skin or nail burns, chronic ones involve systemic toxicity, eye injuries, inhalation and ingestion-related symptoms that can be even fatal. HF can be harmful and particularly aggressive to soft tissues, but symptoms may not be apparent immediately after exposure. The hazardous effects are not based on the pH value, but on the toxicity of HF. Potential hazards of HF known from other applications than dentistry should be considered also in dental applications. Especially the clinicians, who often deal with adhesive cementation or repair of glass ceramics, should take necessary precautions for possible hazards of HF. Scientific reports, medical and chemical textbooks, handbooks, product information, manufacturers instructions, Internet web sites of the HF manufacturers were also referred. In dentistry, HF is most commonly used for conditioning the glass ceramics either prior to cementation or for intraoral repair.Exposure to HF can be harmful and may not be immediately apparent being particularly aggressive for soft tissues. This is not based on the pH value, but on its toxicity. Common routes of exposure are inhalation, dermal exposure and ingestion that lead to the general symptoms of toxicity such as lung injury, skin burns, systemic toxicity and painful necrotic lesions. General symptoms are skin burns, systemic toxication and eye irritation by fume exposure. No report was found on the hazardous effects of HF in dentistry. HF is commonly used to condition the ceramic surfaces prior to cementation or repair. Especially the clinicians, who often deal with glass ceramics, should take necessary precautions for possible hazards of HF.

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“…Additionally, the silane agent increases the surface energy of ceramic substrates and improves adhesive and/or cement wettability (2). An appropriate silane protocol should therefore be used to assure the bond strength success and longevity of dental restoration (1,4,5).…”

Section: Introductionmentioning

confidence: 99%

Silanated Surface Treatment: Effects on the Bond Strength to Lithium Disilicate Glass-Ceramic

et al. 2015

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The aim of this study was to evaluate the effect of silanization protocols on the bond strength of two resin cements to a lithium disilicate glass-ceramic. Thirty-two ceramic discs were assigned to 2 groups (n=16): G1 -dual-cured resin cement and G2 -lightcured resin cement. Four subgroups were evaluated according to the used silanization protocol. The glass-ceramic was etched with 10% hydrofluoric acid for 20 s and silane was applied for 1 min, as follows: CTL -according to the manufacturer's instructions; HA -dried with hot air; NWA -washed and dried with water and air at room temperature; HWA -washed and dried with hot water and hot air. Thereafter, adhesive was applied and light-cured for 20 s. Silicon molds were used to prepare resin cement cylinders (1x1 mm) on the ceramic surface. The specimens were stored in deionized water at 37 °C for 48 h and subjected to a micro-shear test. The data were submitted to statistical analysis (α=0.05). Group G1 showed higher bond strengths than G2, except for the CTL and NWA subgroups. Differences as function of the silanization protocol were only observed in G1: HWA (25.13±6.83)≥HA (22.95±7.78)≥CTL(17.44±7.24) ≥NWA(14.63±8.76). For G2 there was no difference among the subgroups. In conclusion, the silanization protocol affected the resin cement/ceramic bond strengths, depending on the material. Washing/drying with hot water and/or hot air increased only the bond strength of the dual-cured resin cement.S i l a n a t e d S u r f a c e T r e a t m e n t : Effects on the Bond Strength to Lithium Disilicate Glass-Ceramic

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Microtensile bond strength of a resin cement to feldpathic ceramic after different etching and silanization regimens in dry and aged conditions

Cited by 162 publications

References 22 publications

Orthodontic shear bond strength to porcelain surface in wet conditions

Orthodontic shear bond strength to porcelain surface in wet conditions

Possible hazardous effects of hydrofluoric acid and recommendations for treatment approach: a review

Silanated Surface Treatment: Effects on the Bond Strength to Lithium Disilicate Glass-Ceramic

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