Antimicrobial and fluoride release capacity of orthodontic bonding materials

Caldeira, Erika Machado; Osório, Amanda Farias; Oberosler, Edna Lúcia Couto; Vaitsman, Delmo Santiago; Alviano, Daniela Sales; Nojima, Matilde da Cunha Gonçalves

doi:10.1590/1678-775720130010

Cited by 13 publications

(18 citation statements)

References 27 publications

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“…Thus, a material that is capable of releasing both fluoride and calcium ions would be expected to enhance the formation of caries-resistant fluoroapatite on the surface of the tooth which has been shown to make the major contribution to caries prevention. [36] Given the magnitude of the use of composites as dental restoratives, composites that contain available sources of these ions may have substantial advantages compared to those that do not release these ions. As is evident from Figures 1 and 3, both of the BAG composites in this study were found to release calcium and fluoride ions prior to and following fluoride recharge.…”

Section: Discussionmentioning

confidence: 99%

Ion release from, and fluoride recharge of a composite with a fluoride-containing bioactive glass

et al. 2014

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Objectives Materials that are capable of releasing ions such as calcium and fluoride, that are necessary for remineralization of dentin and enamel, have been the topic of intensive research for many years. The source of calcium has most often been some form of calcium phosphate, and that for fluoride has been one of several metal fluoride or hexafluorophosphate salts. Fluoride-containing bioactive glass (BAG) prepared by the sol-gel method acts as a single source of both calcium and fluoride ions in aqueous solutions. The objective of this investigation was to determine if BAG, when added to a composite formulation, can be used as a single source for calcium and fluoride ion release over an extended time period, and to determine if the BAG-containing composite can be recharged upon exposure to a solution of 5,000 ppm fluoride. Methods BAG 61 (61% Si; 31% Ca; 4% P; 3% F; 1% B) and BAG 81 (81% Si; 11% Ca; 4% P; 3% F; 1% B) were synthesized by the sol gel method. The composite used was composed of 50/50 Bis-GMA/TEGDMA, 0.8% EDMAB, 0.4% CQ, and 0.05% BHT, combined with a mixture of BAG (15%) and strontium glass (85%) to a total filler load of 72% by weight. Disks were prepared, allowed to age for 24 h, abraded, then placed into DI water. Calcium and fluoride release was measured by atomic absorption spectroscopy and fluoride ion selective electrode methods, respectively, after 2, 22, and 222 h. The composite samples were then soaked for 5 min in an aqueous 5,000 ppm fluoride solution, after which calcium and fluoride release was again measured at 2, 22, and 222 h time points. Results Prior to fluoride recharge, release of fluoride ions was similar for the BAG 61 and BAG 81 composites after 2 h, and also similar after 22 h. At the four subsequent time points, one prior to, and three following fluoride recharge, the BAG 81 composite released significantly more fluoride ions (p<0.05). Both composites were recharged by exposure to 5,000 ppm fluoride, although the BAG 81 composite was recharged more than the BAG 61 composite. The BAG 61 composite released substantially more calcium ions prior to fluoride recharge during each of the 2 and 22 h time periods. Thereafter, the release of calcium at the four subsequent time points was not significantly different (p>0.05) for the two composites. Significance These results show that, when added to a composite formulation, fluoride-containing bioactive glass made by the sol-gel route can function as a single source for both calcium and fluoride ions, and that the composite can be readily recharged with fluoride.

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Section: Discussionmentioning

confidence: 99%

Ion release from, and fluoride recharge of a composite with a fluoride-containing bioactive glass

et al. 2014

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“…To standardize the dimensions of the specimens, a prefabricated Teflon matrix with perforations of 5 mm of diameter and 2 mm of thickness was used, as described in a previous study. 7 A single researcher manipulated the materials in accordance with the manufacturers' instructions, and then inserted them into the matrix in a single increment. Both light cure bonding composites (XT and PLUS) were inserted into the matrix directly from their syringe.…”

Section: Preparation Of Specimensmentioning

confidence: 99%

“…studies point out that bonding materials' properties, such as surface roughness and fluoride release, can influence risk of development of caries. 5,6,7,8,9,10,11 An ideal orthodontic bonding material, besides being able to resist unintentional debonding forces, must be biocompatible and maintain its biological, physical and chemical properties under any condition. Due to the complexity of the oral cavity, they must be capable of withstanding salivary biochemistry, constant changes in pH, different temperatures, and particularly the resident oral microbiota.…”

Section: Introductionmentioning

confidence: 99%

Surface morphologic evaluation of orthodontic bonding systems under conditions of cariogenic challenge

et al. 2019

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Orthodontic bonding systems are submitted to demineralization and remineralization dynamics that might compromise their surface smoothness, and favor biofilm aggregation and caries development. The aim of the present study was to evaluate the effects of a cariogenic challenge model (in vitro pH-cycling model) on the surface roughness and topography of 3 bonding materials: Transbond TM XT (XT), Transbond TM Plus Color Change (PLUS) and Fuji Ortho TM LC (FUJI), by means of Atomic Force Microscopy (AFM). Six specimens with standardized dimensions and surface smoothness were fabricated per group, and the materials were manipulated in accordance with the manufacturers' instructions. No polishing was necessary. AFM tests were performed before and after pH-cycling, taking 3 readouts per specimen. The roughness results (Ra) were obtained at nanometric levels (nm) and surface records were acquired in two-and three-dimensional images of height and lock-in phase of the material components. The surfaces of all groups analyzed in the study were morphologically altered, presenting images suggestive of matrix degradation and loss of matrix-load integrity. FUJI presented the greatest increase in surface roughness, followed by XT and PLUS, respectively (p≤0.001). Nevertheless, the roughness values found did not present sufficient degradation to harbor bacteria. The surface roughness of all tested materials was increased by pH-cycling. The use of materials capable of resisting degradation in the oral environment is recommended, in order to conserve their integrity and of the surrounding tissues.

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“…In vitro studies have shown fluoride release from adhesive systems, suggesting that these materials have some effect in the enamel and dentin remineralization process and contribute to the control of secondary caries (2,(13)(14)(15)(16)(17). A previous study evaluated fluoride release behavior and the demineralization inhibition capacity of two adhesive systems and the conclusion was that adhesive systems have a fluoride-releasing behavior as they were able to reduce dental tissue demineralization after acid exposure (8).…”

Section: Introductionmentioning

confidence: 99%

Influence of Different Mechanisms of Fluoride Release from Adhesive Systems

2013

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and Adper Single Bond 2 (SB2 -3M ESPE) (negative control). CPB and FLB are fluoride containing adhesives that use different F releasing mechanisms. The tested hypothesis was that the F releasing mechanism influences the amount of released F in water. Discshaped specimens (5 mm x 3 mm) were fabricated using a plastic matrix (Demetron Research Corp). Three specimens were produced for each material and each period of evaluation (1, 7, 14, 21 and 28 days) (n=3). Subsequently, the specimens were stored in 10 mL distilled water at 37° C until the analyses were done using a liquid membrane for selective F ion electrode (Orion 710). Four readings were performed on the first day and the remaining evaluation times had one reading/day. Results were statistically analyzed by two-way ANOVA and Tukey's test (a=0.05). CPB released the greatest amount of fluoride in all evaluated periods with the greatest value at 6 th h (0.183 ppm) thereafter decreasing gradually up to the 7 th day when it significantly increased again until the 21 st day. In most measurements, FLB showed similar mean fluoride release values as SB2. Therefore, the fluoride release mechanism influenced the amount of fluoride released in water, confirming the study hypothesis.

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Antimicrobial and fluoride release capacity of orthodontic bonding materials

Cited by 13 publications

References 27 publications

Ion release from, and fluoride recharge of a composite with a fluoride-containing bioactive glass

Ion release from, and fluoride recharge of a composite with a fluoride-containing bioactive glass

Surface morphologic evaluation of orthodontic bonding systems under conditions of cariogenic challenge

Influence of Different Mechanisms of Fluoride Release from Adhesive Systems

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