scholarly journals Comparison of Microleakage of Composite Restorations using Fifth and Sixth Generation Dentin Bonding Agent: An in vivo Study

2012 ◽  
Vol 13 (5) ◽  
pp. 632-636 ◽  
Author(s):  
Pooran Samimi ◽  
Mehrdad Barekatain ◽  
Samaneh Alaei
Keyword(s):  
Nitrate Solution ◽  
Bonding Agent ◽  
Single Bond ◽  
Dentin Bonding ◽  
Composite Restorations ◽  
Sixth Generation ◽  
Dentin Bonding Agent ◽  
Time Periods ◽  
Bonding Systems

ABSTRACT Introduction The success of bonded restorations depends on effective bonding between restorative materials and tooth structure, and it prevents microleakage. New dentin bonding systems have been introduced which promotes this concept. The aim of this study was to compare the amount of microleakage between ‘single bond’ vs ‘Prompt L-Pop’ during different time periods. Materials and methods In this clinical trial study, 60 nonretentive class five cavities were prepared on buccal surfaces of human premolars which were scheduled to be removed for orthodontic purposes. The cavities were restored using two different bonding agents; fifth generation (Single Bond) and sixth generation (Prompt L-Pop) and then filled with resin composite (Filtek Z-250). The samples in both groups were extracted after placing the restoration in three periods of time: Immediately, 1 week and 6 months postplacement. Specimens were sealed with two layers of nail varnish except for 1 mm around restoration and immersed in a silver nitrate solution for 24 hours. The teeth were then sectioned longitudinally and the degree of microleakage was determined by stereomicroscope based on standard usual criteria. Results Single bond showed more leakage at dentin margin than enamel margin in all three extraction periods and differences were significant among three groups (p < 0.05). In samples which were restored with Prompt L-Pop only in groups of 6 months there were significant differences between enamel and dentin margins. At enamel margin there were no significant differences between microleakage of groups according to the passage of time (p > 0.05). Conclusion The results of this study using two different bonding systems, indicate that adhesion to enamel was more valuable than dentin and perhaps systems that include self-etching primers are less sensitive to remaining moisture on dentin and they are less affected during different time periods. How to cite this article Samimi P, Barekatain M, Alaei S. Comparison of Microleakage of Composite Restorations using Fifth and Sixth Generation Dentin Bonding Agent: An in vivo Study. J Contemp Dent Pract 2012;13(5):632-636.

scholarly journals Comparison of patient sensitivity using dentin bonding agent versus zinc phosphate base beneath the amalgam restorations: An in vivo comparative study

2015 ◽  
Vol 4 (4) ◽  
pp. 236
Author(s):  
SarjeevSingh Yadav ◽  
JagadeeswaraRao Sukhabogi ◽  
VemalaBharath Kumar ◽  
MuralikrishnamS Raju ◽  
VenkatV Giri ◽  
...  
Keyword(s):  
Comparative Study ◽  
Zinc Phosphate ◽  
Bonding Agent ◽  
Dentin Bonding ◽  
Dentin Bonding Agent ◽  
Amalgam Restorations

Effect of Different Adhesion Strategies on Bond Strength of Resin Composite to Composite-dentin Complex

2013 ◽  
Vol 38 (1) ◽  
pp. 63-72 ◽  
Author(s):  
M Özcan ◽  
G Pekkan
Keyword(s):  
Bond Strength ◽  
Resin Composite ◽  
Silica Coating ◽  
Bonding Agent ◽  
Acid Etching ◽  
Dentin Bonding ◽  
Composite Restorations ◽  
Composite Type ◽  
Coating Composite ◽  
Dentin Bonding Agent

ABSTRACT Service life of discolored and abraded resin composite restorations could be prolonged by repair or relayering actions. Composite-composite adhesion can be achieved successfully using some surface conditioning methods, but the most effective adhesion protocol for relayering is not known when the composite restorations are surrounded with dentin. This study evaluated the effect of three adhesion strategies on the bond strength of resin composite to the composite-dentin complex. Intact maxillary central incisors (N=72, n=8 per subgroup) were collected and the coronal parts of the teeth were embedded in autopolymerized poly(methyl tfr54methacrylate) surrounded by a polyvinyl chloride cylinder. Cylindrical cavities (diameter: 2.6 mm; depth: 2 mm) were opened in the middle of the labial surfaces of the teeth using a standard diamond bur, and the specimens were randomly divided into three groups. Two types of resin composite, namely microhybrid (Quadrant Anterior Shine; AS) and nanohybrid (Grandio; G), were photo-polymerized incrementally in the cavities according to each manufacturer's recommendations. The composite-enamel surfaces were ground finished to 1200-grit silicone carbide paper until the dentin was exposed. The surfaces of the substrate composites and the surrounding dentin were conditioned according to one of the following adhesion protocols: protocol 1: acid-etching (dentin) + silica coating (composite) + silanization (composite) + primer (dentin) + bonding agent (dentin + composite); protocol 2: silica coating (composite) + acid-etching (dentin) + silanization (composite) + primer (dentin) + bonding agent (dentin + composite); and protocol 3: acid-etching (dentin) + primer (dentin) + silanization (composite) + bonding agent (dentin + composite). Applied primer and bonding agents were the corresponding materials of the composite manufacturer. Silica coating (CoJet sand, 30 μm) was achieved using a chairside air-abrasion device (distance: 10 mm; duration: four seconds in circular motion). After conditioning protocols, the repair resin was adhered to the substrate surfaces using transparent polyethylene molds (diameter: 3.6 mm) incrementally and photo-polymerized. The substrate-adherend combinations were as follows: AS-AS, G-G, AS-G. Shear force was applied to the adhesive interface in a Universal Testing Machine (crosshead speed: 1 mm/min). The types of failures were further evaluated and categorized as follows: 1) cohesive in the composite substrate and 2) adhesive at the interface. Bond strength values (MPa) were statistically analyzed using two-way analysis of variance and least significant difference post hoc tests (α=0.05). Significant effects of the adhesion strategy (p=0.006) and the composite type (p=0.000) were found. Interaction terms were not significant (p=0.292). Regardless of the substrate-adherend combination, protocol 1 (17–22 MPa) showed significantly higher results than did protocols 2 (15–17 MPa) and 3 (11–17 MPa) (p=0.028, p=0.002, respectively). The highest results were obtained from the G-G combination after all three protocols (17–22 MPa). The incidence of cohesive failures was more common when the substrate and the adherend were the same composite type (AS-AS: 87.5%, 87.5%, 75%; G-G: 100%, 75%, 50% for protocols 1, 2, and 3, respectively). When substrate and adherend were used interchangeably, adhesive failures were more frequent (25%, 50%, and 100% for protocol 1, 2, and 3, respectively). When the substrate and the adherend are of the same type, greater repair strength could be expected. In the repair of composites next to the dentin, depending on the composite type, conditioning the composite with silica coating and silanization after etching the dentin adds to the repair strength compared to the results obtained with silane application only.

Use of a dentin bonding agent for the fixation of strain gauges on bone

2021 ◽  
pp. 104545
Author(s):  
Tanja Grobecker-Karl ◽  
Kamran Orujov ◽  
Virgilia Klär ◽  
Matthias Karl
Keyword(s):  
Bonding Agent ◽  
Strain Gauges ◽  
Dentin Bonding ◽  
Dentin Bonding Agent

scholarly journals In vitro antibacterial effect of fifth generation dentin bonding agent incorporated with nisin on Streptococcus mutans

2021 ◽  
Vol 9 (1) ◽  
Author(s):  
Gopal Keerthipriya ◽  
Nesamani Ravikumar ◽  
Sekar Mahalaxmi
Keyword(s):  
Streptococcus Mutans ◽  
Optical Density ◽  
Bacterial Growth ◽  
Membrane Integrity ◽  
Bonding Agent ◽  
Control Group ◽  
Dentin Bonding ◽  
Fifth Generation ◽  
Live Bacteria ◽  
Dentin Bonding Agent

Abstract Introduction Bacterial adherence to restorative materials such as composite resin is one of the aetiology of secondary caries. This study evaluated the antibacterial efficacy of fifth generation bonding agent (BA) modified with nisin, against Streptococcus mutans based on its growth, adherence and membrane integrity. Methods Adhesive eluents of the experimental bonding agents were obtained using 250 μl Brain Heart Infusion (BHI) broth and the groups were control (BA with 0% Nisin), bonding agent with 1 wt% (NBA 1) and 5 wt% nisin (NBA 5). To this, 10 μl S. mutans culture was added and incubated at 37 °C. Bacterial growth was estimated by changes in optical density using spectrophotometer every 20 min for 2 h. The results were statistically analysed using one way ANOVA followed by Tukey Post Hoc test. For adherence and membrane integrity test, 10 μl of BHI supplemented with 1% sucrose and 50 μl of bacterial suspension were inoculated onto the cured specimens, and incubated for 4 h. After rinsing, 1 ml of Live/Dead BacLight bacterial viability stain was added and incubated in the dark for 15 min and observed under confocal laser scanning microscope (CLSM) for intact (green/live) and damaged (red/dead) bacterial membranes. Results Mean optical density was significantly higher in control group at all time intervals with maximum value at 2 h (0.83 ± 0.008), while there was a concentration dependant reduction in bacterial growth with the NBA groups (0.50 ± 0.007). Correspondingly, the NBA groups showed higher amount of dead than live bacteria, while live bacteria were predominant in the control group. Significance Addition of an antibacterial agent nisin in dentin bonding agent may render the resin dentin interface more resistant to bacterial penetration, and adherence of cariogenic bacteria like S. mutans.

scholarly journals Influence of "soft start" polymerization on marginal sealing in resin composite restorations

2003 ◽  
Vol 50 (2) ◽  
pp. 59-64 ◽  
Author(s):  
Larisa Blazic ◽  
Slavoljub Zivkovic
Keyword(s):  
Resin Composite ◽  
Nitrate Solution ◽  
Silver Nitrate Solution ◽  
Class Ii ◽  
Composite Resins ◽  
Human Teeth ◽  
Composite Restorations ◽  
Soft Start ◽  
Significant Difference ◽  
Bonding Systems

The purpose of this study was to evaluate the marginal microleakage in Class II with different materials in resin composite restorations cured by using "soft start" and standard polymerization techniques. Two adhesive Class II cavities were prepared in 50 human teeth with enamel in-between. Samples were divided into 5 groups and filled with composite resins, compatible flow resin composites and bonding systems. The ocluso-mesial restorations were cured with standard curing technique, and the ocluso-distal restorations were cured with "soft start" curing technique. After thermocycling, the teeth were immersed in silver nitrate solution and sectioned for leakage evaluation. The results pointed out, after "soft start" and standard curing techniques, that the best marginal behavior in Class II restorations was obtained with Tetric Ceram / Tetric Flow composite resins, then with Filtek Z 250 / Filtek Flow, followed by Admira Admira Flow and Point / Revolution composite materials. The deepest dye penetration was found in cavities with Diamond Lite / Diamond Link composite restorations. No statistically significant difference was found in the tested composite resin restorations, whether treated with "soft start" polymerization or with standard polymerization technique, in regard to marginal micro leakage.

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