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Effect of Fluoride-containing Mouthrinses on the Translucence of Resin Modified Glass Ionomer Cements
Garcia, Patrícia Petromilli Nordi Sasso;Corona, Silmara Aparecida Milori;Dibb, Regina Guenka Palma;Chimello, Daniela Thomazatti;Catirse, Alma Blásida Elizaur;Freitas, Emaneula Maurício;
Materials Research , 2002, DOI: 10.1590/S1516-14392002000400015
Abstract: the aim of this in vitro study was to assess the effect of different fluoride-containing mouthrinses on the translucence of resin-modified glass ionomer cements, as a function of the restorative material used, the fluoride-containing solution employed and the time of immersion. disks were prepared (10 mm × 2 mm) with the modified glass ionomer cements vitremer (3m) and fuji ii lc (gc co.), and immersed in three fluoride-containing solutions: fluordent reach (johnson & johnson), fluorgard (colgate-palmolive) and oral b (gillette do brasil ltda). translucence was measured with electrophoresis equipment (jouan) after different immersion times. the results obtained were submitted to anova and tukey's test, and a statistically significant decrease was observed in the translucence of the materials after immersion in the fluoride-containing solutions. fuji ii lc demonstrated the lowest alteration in translucence, independently of the solution employed. fluorgard was the fluoride-containing mouthrinse that promoted the highest alteration. it can be concluded that the fluoride-containing mouthrinses influenced the translucence of the resin-modified glass ionomer cements.
Effect of Fluoride-containing Mouthrinses on the Translucence of Resin Modified Glass Ionomer Cements
Garcia Patrícia Petromilli Nordi Sasso,Corona Silmara Aparecida Milori,Dibb Regina Guenka Palma,Chimello Daniela Thomazatti
Materials Research , 2002,
Abstract: The aim of this in vitro study was to assess the effect of different fluoride-containing mouthrinses on the translucence of resin-modified glass ionomer cements, as a function of the restorative material used, the fluoride-containing solution employed and the time of immersion. Disks were prepared (10 mm x 2 mm) with the modified glass ionomer cements Vitremer (3M) and Fuji II LC (GC Co.), and immersed in three fluoride-containing solutions: Fluordent Reach (Johnson & Johnson), Fluorgard (Colgate-Palmolive) and Oral B (Gillette do Brasil Ltda). Translucence was measured with electrophoresis equipment (JOUAN) after different immersion times. The results obtained were submitted to ANOVA and Tukey's test, and a statistically significant decrease was observed in the translucence of the materials after immersion in the fluoride-containing solutions. Fuji II LC demonstrated the lowest alteration in translucence, independently of the solution employed. Fluorgard was the fluoride-containing mouthrinse that promoted the highest alteration. It can be concluded that the fluoride-containing mouthrinses influenced the translucence of the resin-modified glass ionomer cements.
Effects of etching and adhesive applications on the bond strength between composite resin and glass-ionomer cements
Pamir, Tijen;?en, Bilge Hakan;Evcin, ?zgür;
Journal of Applied Oral Science , 2012, DOI: 10.1590/S1678-77572012000600008
Abstract: objective: this study determined the effects of various surface treatment modalities on the bond strength of composite resins to glass-ionomer cements. material and methods: conventional (ketactm molar quick applicaptm) or resin-modified (photactm fil quick aplicaptm) glass-ionomer cements were prepared. two-step etch-rinse & bond adhesive (adpertm single bond 2) or single-step self-etching adhesive (adpertm prompttm l-poptm) was applied to the set cements. in the etch-rinse & bond group, the sample surfaces were pre-treated as follows: (1) no etching, (2) 15 s of etching with 35% phosphoric acid, (3) 30 s of etching, and (4) 60 s of etching. following the placement of the composite resin (filtektm z250), the bond strength was measured in a universal testing machine and the data obtained were analyzed with the two-way analysis of variance (anova) followed by the tukey's hsd post hoc analysis (p=0.05). then, the fractured surfaces were examined by scanning electron microscopy. results: the bond strength of the composite resin to the conventional glass-ionomer cement was significantly lower than that to the resin-modified glass-ionomer cement (p<0.001). no significant differences were determined between the self-etching and etch-rinse & bond adhesives at any etching time (p>0.05). however, a greater bond strength was obtained with 30 s of phosphoric acid application. conclusions: the resin-modified glass-ionomer cement improved the bond strength of the composite resin to the glass-ionomer cement. both etch-rinse & bond and self-etching adhesives may be used effectively in the lamination of glass-ionomer cements. however, an etching time of at least 30 s appears to be optimal.
Effects of etching and adhesive applications on the bond strength between composite resin and glass-ionomer cements  [cached]
Tijen Pamir,Bilge Hakan ?en,?zgür Evcin
Journal of Applied Oral Science , 2012,
Abstract: OBJECTIVE: This study determined the effects of various surface treatment modalities on the bond strength of composite resins to glass-ionomer cements. MATERIAL AND METHODS: Conventional (KetacTM Molar Quick ApplicapTM) or resin-modified (PhotacTM Fil Quick AplicapTM) glass-ionomer cements were prepared. Two-step etch-rinse & bond adhesive (AdperTM Single Bond 2) or single-step self-etching adhesive (AdperTM PromptTM L-PopTM) was applied to the set cements. In the etch-rinse & bond group, the sample surfaces were pre-treated as follows: (1) no etching, (2) 15 s of etching with 35% phosphoric acid, (3) 30 s of etching, and (4) 60 s of etching. Following the placement of the composite resin (FiltekTM Z250), the bond strength was measured in a universal testing machine and the data obtained were analyzed with the two-way analysis of variance (ANOVA) followed by the Tukey's HSD post hoc analysis (p=0.05). Then, the fractured surfaces were examined by scanning electron microscopy. RESULTS: The bond strength of the composite resin to the conventional glass-ionomer cement was significantly lower than that to the resin-modified glass-ionomer cement (p<0.001). No significant differences were determined between the self-etching and etch-rinse & bond adhesives at any etching time (p>0.05). However, a greater bond strength was obtained with 30 s of phosphoric acid application. CONCLUSIONS: The resin-modified glass-ionomer cement improved the bond strength of the composite resin to the glass-ionomer cement. Both etch-rinse & bond and self-etching adhesives may be used effectively in the lamination of glass-ionomer cements. However, an etching time of at least 30 s appears to be optimal.
Fluoride release profile of a nanofilled resin-modified glass ionomer cement
Paschoal, Marco Aurélio Benini;Gurgel, Carla Vecchione;Rios, Daniela;Magalh?es, Ana Carolina;Buzalaf, Marília Afonso Rabelo;Machado, Maria Aparecida de Andrade Moreira;
Brazilian Dental Journal , 2011, DOI: 10.1590/S0103-64402011000400002
Abstract: the present study aimed to compare the fluoride (f-) release pattern of a nanofilled resin-modified glass ionomer cement (gic) (ketac n100 - kn) with available gics used in dental practice (resin-modified gic - vitremer - v; conventional gic - ketac molar - km) and a nanofilled resin composite (filtek supreme - rc). discs of each material (n=6) were placed into 4 ml of deionized water in sealed polyethylene vials and shaken, for 15 days. f- release (μg f-/cm2) was measured each day using a fluoride-ion specific electrode. cumulative f- release means were statistically analyzed by linear regression analysis. in order to analyze the differences among materials and the influence of time in the daily f- release, 2-way anova test was performed (α=0.05). the linear fits between the cumulative f- release profiles of rc and km and time were weak. kn and v presented a strong relationship between cumulative f- release and time. there were significant differences between the daily f- release overtime up to the third day only for gics materials. the daily f- release means for rc were similar overtime. the results indicate that the f- release profile of the nanofilled resin-modified gic is comparable to the resin-modified gic.
Tensile bond strength between different glass ionomer cement and composite resin using three adhesive systems Avalia o da resistência de uni o interfacial entre diferentes cimentos de ion mero de vidro e resina composta, usando três sistemas adesivos  [cached]
Fátima Cristina de Sá,Guilherme Augusto de Barros Nolasco,Jorge Augusto César,Raul Santos de Sá
Semina : Ciências Biológicas e da Saúde , 2005,
Abstract: The purpose of this study was to evaluate the tensile bond strength (TBS) among a Composite Resin (Filtek Z250) and six conventional Glass Ionomer Cements, three used for lining (Bioglass F, Vidrion F and Glass Ionomer L.C.) and three for restorations (Ketac Fil, Vidrion R and Glass Ionomer type II) etched and non etched, using three adhesive systems (Single Bond, Bond 1 and Stae). Thirty-six groups were made, ten samples for each group, totalizing 360 specimens. There were significant differences on TBS among groups. Group 31 (Glass Ionomer Cement type II) showed the highest TBS (9.65 MPa) in comparison to other tested groups. Group 16 (Glass Ionomer L.C) presented the lowest TBS (2.72 MPa) in comparison to all the other groups. Therefore, it can be concluded that the acid etching of the Glass Ionomer Cement is not necessary. Foi avaliada, ">in vitro, a resistência de uni o, por tra o, entre uma Resina Composta micro-híbrida (Filtek Z-250) e seis Cimentos de Ion mero de Vidro (CIV) convencionais: três utilizados para base/forramento (Bioglass F, Vidrion F e Glass Ionomer Lining Cement) e três para restaura o (Ketac Fil, Vidrion R e Glass Ionomer Cement type II), sem e com condicionamento ácido ortofosfórico a 37%, usando três sistemas adesivos (Single Bond, Bond 1 e Stae). Foram confeccionados 36 grupos de 10 corpos-de-prova cada, totalizando 360 espécimes. Para análise estatística, foi utilizado o teste de Tukey-Kramer. Dentre os três CIV de base/forramento, os grupos 2 e 5 (Bioglass F) apresentaram valores mais altos de adesividade à resina (7,24 e 6,03 MPa) respectivamente. Quanto aos três CIV de restaura o, todos apresentaram maior resistência de uni o, superior aos de base/forramento, sendo que o Glass Ionomer Cement type II (Grupo 31) e Vidrion R apresentaram maior for a de ades o (9,65 e 7,47 MPa) à resina composta. O grupo 16 (Glass Ionomer L.C.) mostrou menor adesividade à resina (2,72 MPa). Houve diferen as significantes entre os 36 grupos experimentais. Conclui-se que o condicionamento ácido é dispensável tanto para os CIV de base/restaura o como para os CIV de restaura o.
Long-term fluoride release from resin-reinforced orthodontic cements following recharge with fluoride solution
Santos, Rogério Lacerda dos;Pithon, Matheus Melo;Vaitsman, Delmo Santiago;Araújo, M?nica Tirre de Souza;Souza, Margareth Maria Gomes de;Nojima, Matilde Gon?alves da Cunha;
Brazilian Dental Journal , 2010, DOI: 10.1590/S0103-64402010000200002
Abstract: the aim of this study was to test the hypothesis that there is no difference in the fluoride release behavior of resin-reinforced glass ionomer cements before or after fluoride recharge. the materials were divided into 5 groups: 2 resin-reinforced glass ionomer cements used for attaching orthodontic bands, that is, group fob (fuji ortho band) and group mcb (multi-cure glass ionomer orthodontic band cement); 2 resin-reinforced glass ionomer cements and a composite used for bonding orthodontic brackets, that is, group oglc (ortho glass lc), group folc (fuji ortho lc), and group txt (transbond xt), respectively. fluoride release was measured during a 60-day period by using selective ion electrodes connected to an ionic analyser. after 4 weeks, the samples were exposed to 0.221% sodium fluoride solution. the results showed that cements achieved a maximum fluoride release 24 h after initial setting. no statistically significant differences were observed between groups fob and oglc regarding the amount of released fluoride following fluoride recharge from day 31 to day 36 (p>0.05). in conclusion, fob and oglc cements showed a higher capacity of capturing and releasing fluoride compared to the other cements studied.
A comparative study to evaluate the effect of fluoride releasing sealant cured by visible light, argon laers, and light emitting diode curing units: An in vitro study  [cached]
Das U,Prashanth S
Journal of the Indian Society of Pedodontics and Preventive Dentistry , 2009,
Abstract: In Pediatric Dentistry, the use of pit and fissure sealant is one of the essential forms of prevention. Pit and fissure caries may be substantially decreased by obliteration of these developmental defects in occlusal, buccal and lingual surfaces with resin based dental sealants. Visible light-curing units, or LCUs, are an integral part of modern adhesive dentistry" They are used to cure resin based composite restoration materials, resin modified glass-ionomer and pit and fissure sealants, as well as to bond orthodontic teeth. Most recently, the argon laser has been approved for initiating the setting reaction with visible light cured-resins. Argon curing of resin materials has been show to enhance the physical properties and degree of polymerization of the resin, while reducing the polymerization time by 75 percent. The study is undertaken considering the inadequate research reports of regarding the comparison of curing ability using argon laser. LEDs and visible light as well as the resistant towards caries activity of the preventive fluoride releasing pit and fissure sealant cured by above mentioned curing units.
Microhardness evaluation around composite restorations using fluoride-containing adhesive systems
Magalh?es, Cláudia Silami de;Hara, Anderson Takeo;Turssi, Cecilia Pedroso;Serra, M?nica Campos;Giannini, Marcelo;
Journal of Applied Oral Science , 2005, DOI: 10.1590/S1678-77572005000300011
Abstract: the purpose of this study was to evaluate the microhardness of dental enamel around composite restorations bonded with fluoride-containing adhesive systems (fcas), after thermo- and ph-cycling protocols. standardized cylindrical cavities were prepared on enamel surfaces of 175 dental fragments, which were randomly assigned into seven experimental groups (n=25). four groups used fcas: optibond solo (os); prime&bond 2.1 (pb); syntac sprint (ss) and tenure quick (tc). other groups consisted of "sandwich" technique restoration (str) (glass ionomer liner + hydrophobic adhesive resin /restorative composite) or used single bond with (sb) or without (sbwc) cycling protocols. adhesive systems were applied according to manufacturers' instructions and cavities were restored with a microfilled composite (durafill vs). after finishing and polishing, all groups were submitted to 1,000 thermal cycles (5 oc and 55 oc) and to demineralization (ph 4.3) and remineralization (ph 7.0) cycling protocols, except for sbwc group. the knoop microhardness of enamel surfaces were measured around restorations. indentations were recorded at 150, 300 and 450-mm from the cavity wall. data were analyzed by two-way anova and duncan's test (a=0.05%). means ± sd of enamel microhardness for the groups were (kg/mm2): sbwc: 314.50 ± 55.93a ; sb: 256.78 ± 62.66b; str: 253.90 ± 83.6b; tq: 243.93 ± 68.3b; os: 227.97 ± 67.1c; pb: 213.30 ± 91.3d; ss: 208.73 ± 86.6d. means ± sd of microhardness for the distances 150, 300, 450mm from the cavity wall were, respectively: 234.46 ± 77.81a; 240.24 ± 85.12a; 262.06 ± 79.46b. sbwc group, which was not submitted to thermo- and ph-cycling protocols, showed the highest enamel microhardness mean value and the fcas resulted in lower microhardness values. at 450 mm from the cavity wall, the enamel microhardness increased significantly.
A comparative survey on the increased fracture resistance of amalgam restored teeth using three types of Glass Ionomer as adhesive liners
Shafiee F.,Borhan Haghighi Z
Journal of Dental Medicine , 2004,
Abstract: Statement of Problem: Because dental amalgam does not adhere to tooth structure, using adhesive cements in amalgam-bonded restorations have been increased. Purpose: The goal of this in-vitro study was to compare the effects of three types of glass ionomer as adhesive liners as well as varnish liner in increasing fracture resistance of teeth restored with amalgam. Materials and Methods: Seventy extracted human maxillary premolars were selected and MOD cavities were prepared on them excluding ten intact teeth as positive control group and ten cavity prepared teeth without restoration as negative control group. All the prepared teeth were then restored with spherical amalgam (gs.80) with one of the following liners silver alloy glass ionomer liner, conventional glass ionomer liner, varnish liner, resin-modified glass ionomer and resin-modified glass ionomer with delayed light curing. The teeth were stored in 37 C distilled water for 7 days and were then loaded under compressive strength using an Instron testing machine. The force required to fracture teeth were recorded and the data were analyzed statistically using ANOVA and Tukey HSD tests. Results: Statistically significant differences were observed in fracture resistance between restored and non-restored samples. Comparisons between groups attributed significant effects to resin-modified glass ionomer in increasing fracture resistance of amalgam restored teeth (P<0.05). In most specimens, one cusp was separated from tooth structure whereas amalgam remained bonded to the intact cusp. Conclusion: According to these findings, resin-modified glass ionomer put a statistically significant effect in fracture resistance of amalgam-restored teeth.
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