scholarly journals CHX Stabilizes the Resin/demineralized Dentin Interface

2021 ◽  
Vol 32 (4) ◽  
pp. 106-115
Author(s):  
Ana Rosa Costa ◽  
Lucas Zago Naves ◽  
Franklin Garcia-Godoy ◽  
Fernanda Midori Tsuzuki ◽  
Américo Bortolazzo Correr ◽  
...  
Keyword(s):  
Bond Strength ◽  
Storage Time ◽  
Adhesive System ◽  
Control Group ◽  
Treatment Control ◽  
Microtensile Bond Strength ◽  
Pre Treatment ◽  
Acid Gel ◽  
Treatment Application ◽  
Plot Design

Abstract The aim of this study was to evaluate the effect of 2% chlorhexidine digluconate (CHX) on microtensile bond strength (µTBS) between an adhesive system and under 3 dentin conditions. For that, this study evaluated the adhesive interface at initial, after 6 months and 1 year of storage. Forty-eight human third molars were prepared and randomly divided into 3 groups, according to dentin substrates: sound dentin (Sd), caries-infected dentin (Ci) and caries-affected dentin (Ca). The groups were subdivided into two according to the dentin pre-treatment: application of 2% CHX or without pre-treatment (control). The dentin surfaces were etched with 35% phosphoric acid gel and bonded with Adper Single Bond 2 (3M ESPE) adhesive system according to manufacturer’s instructions. Subsequently, the specimens were stored in deionized water at 37°C for 24h, 6 months and 1 year. Two additional teeth were used to analyze the bonding interfaces by SEM. Data was submitted to three-way ANOVA in a split plot design and Tukey’s test (α = 0.05). The results showed that Ci decreased µTBS values when compared to Ca and Sd, regardless storages time or treatment. Stored samples for 6 months and 1 year decreased the µTBS for the control group, but no difference was found between storages time for the CHX group. As a conclusion, the 2% CHX application after etching showed improved dentin bond strength in the storage time, regardless of the substrates evaluated.

scholarly journals Influence of Water Aging on Microtensile Bond Strength of a Flowable and a Packable Bulk-fill Resin Composites to Dentin

2020 ◽  
Vol 8 (D) ◽  
pp. 112-117
Author(s):  
Ayah Atif Selim ◽  
Ahmed Fawzy Abo Elezz ◽  
Rehab Khalil Safy
Keyword(s):  
Bond Strength ◽  
Storage Time ◽  
Resin Composite ◽  
Water Storage ◽  
Aging Effect ◽  
Mean Value ◽  
Control Group ◽  
Microtensile Bond Strength ◽  
Significant Difference ◽  
Influence Of Water

AIM: Investigation of the aging effect on the microtensile bond strength (μTBS) of bulk-fill resin composite (RC) versus a conventionally incrementally applied one. MATERIALS AND METHODS: A total number of 45 sound human impacted third molars extracted molars have been selected to prepare specimens for the μTBS test. Teeth were randomly divided into three groups (C) according to type of RC material which used for restoring the teeth. Where nanohybrid RC (Grandio®SO) was used as the control Group (C1), packable bulk-fill RC (X-tra fil®) was used for restoring teeth in C2 group and flowable bulk-fill RC (X-tra base®) was used for restoring teeth in C3 group. Each group was further subdivided into 3 subgroups (n = 5) according to the water storage time, where in subgroup 1; teeth were stored for 24 h, subgroup 2; teeth were stored for 3 months while for subgroup 3; and teeth were stored for 6 months. After water storage, teeth were sectioned for preparation of μTBS testing beams. Maximum tensile stresses were recorded in megapascal (MPa). RESULTS: After 24 h of water storage, the X-tra base® showed a higher statistically significant μTBS to dentin (33.82 ± 9.84 MPa) than did the other two types of RCs. After 3 months, the X-tra fil® showed the lowest mean value of μTBS (10.90 ± 5.66 MPa), meanwhile, after 6 months of water storage Grandio®SO showed the highest mean value of μTBS (15.85 ± 6.76 MPa). Regardless of the time the X-tra fil® showed the lowest mean of μTBS (15.07 ± 11.73 MPa), while there is no significant difference between the X-tra base® and Grandio®SO. Furthermore, the water aging adversely affects μTBS values which deceased gradually by time. CONCLUSION: The packable bulk-fill RC characterized by lower μTBS to dentin in comparison to the flowable bulk fill and the incrementally applied nanohybrid RCs. Furthermore, the μTBS of the three tested materials decreased gradually by aging.

scholarly journals Effect of Metalloproteinase Inhibitors on the Microtensile Bond Strength of Composite Resin to Er:YAG Laser-Irradiated Dentin

2016 ◽  
Vol 27 (4) ◽  
pp. 442-445 ◽  
Author(s):  
Beatriz Carlos Correa ◽  
Rodrigo Galo ◽  
Camila Scatena ◽  
Maria Cristina Borsatto ◽  
Aloísio Oro Spazzin ◽  
...  
Keyword(s):  
Bond Strength ◽  
Composite Resin ◽  
Er:Yag Laser ◽  
Testing Machine ◽  
Adhesive System ◽  
Fracture Pattern ◽  
Chemical Degradation ◽  
Control Group ◽  
Microtensile Bond Strength ◽  
Cross Sectional

Abstract This study evaluated the effect of matrix metalloproteinase (MMP) inhibitors - 2% (CHX) and sodium fluoride (NaF) (5000 ppm) - on microtensile bond strength (μTBS) of composite resin to Er:YAG laser-irradiated dentin after chemical degradation of the bond interface. The occlusal surface of forty sound human molars was removed exposing the dentin surface (n=10), which was polished, irradiated with Er:YAG laser, acid etched and dried. Twenty specimens were rewetted with 2% CHX (control group) and 20 were rewetted with NaF (5000 ppm). The adhesive system was applied and a 4-mm-high plateau of light-cured composite resin was built up. Resin-dentin sticks were obtained with a rectangular cross-sectional area (0.8-1 mm2) and were either stored in water at 37 ?#61616;C for 24 h or submitted to chemical degradation. For chemical degradation, they were immersed in 10% NaOCl aqueous solution for 5 h and rinsed in water for 1 h. The sticks were submitted to microtensile test in a mechanical testing machine at 0.5 mm/min until failure. Fracture pattern was analyzed using SEM. μTBS values were calculated in MPa and submitted to analysis of variance ANOVA (α=0.05). The variance analysis showed that the 'MMP inhibitor' and 'degradation' factors (p=0.214 and p=0.093, respectively) and interaction between the factors were not statistically significant (p=0.143). Mixed failure predominated in all groups. In conclusion, the 2% CHX and NaF 5000 ppm presented similar μTBS of composite resin to laser-irradiated dentin before and after chemical degradation

scholarly journals Bond strength of universal adhesive applied to dry and wet dentin

2020 ◽  
Vol 19 ◽  
pp. e201662
Author(s):  
Maria Luísa de Alencar e Silva Leite ◽  
Caroline de Farias Charamba ◽  
Renally Bezerra Wanderley e Lima ◽  
Sônia Saeger Meireles ◽  
Rosângela Marques Duarte ◽  
...  
Keyword(s):  
Bond Strength ◽  
Storage Time ◽  
Resin Composite ◽  
Adhesive System ◽  
Microtensile Bond Strength ◽  
Universal Adhesive ◽  
Bonding Quality ◽  
Etch And Rinse ◽  
Significant Difference ◽  
One Year

Aim: This study evaluated the influence of dentin wettability on the immediate and extended microtensile bond strength (mTBS) of a universal adhesive system used in the etch-and-rinse strategy. Methods: Twenty human third molars were selected and divided into four groups according to the adhesive system and dentin wettability. The mTBS values of each group were registered 24 h and one year after adhesive system application and resin composite block build-up (n=30). Data were analyzed by the t-test (p<0.05). Results: When both adhesive systems were compared, there was no statistically significant difference when they were applied following wet bonding (p>0.05). However, the dry bonding reduced μTBS values of the Adper Single Bond 2 adhesive (p<0.05). Regarding storage time, both groups presented similar μTBS values at 24 h and one year (p>0.05). Conclusions: Therefore, the Scotchbond Universal Adhesive can be applied to dry or wet dentin without compromising the etch-and-rinse bonding quality and the durability of the restorations.

Effect of Time and Temperature of Air Jet on the Mechanical and Biological Behavior of a Universal Adhesive System

2021 ◽  
Author(s):  
R Zimmer ◽  
ML Leite ◽  
CA de Souza Costa ◽  
J Hebling ◽  
G Anovazzi ◽  
...  
Keyword(s):  
Bond Strength ◽  
Morphological Changes ◽  
Adhesive System ◽  
Biological Behavior ◽  
Control Group ◽  
Cytotoxicity Test ◽  
Single Bond ◽  
Microtensile Bond Strength ◽  
Universal Adhesive ◽  
Air Jet

SUMMARY Objectives: To evaluate the influence of heat application on the degree of conversion (DC) of the 3M Single Bond Universal Adhesive System, as well as its transdentinal cytotoxicity and microtensile bond strength to dentin. Methods: Experimental groups were established according to the time and temperature of the air jet: G1: 5 seconds–25°C; G2: 10 seconds–25°C; G3: 20 seconds–25°C; G4: 5 seconds–50°C; G5: 10 seconds–50°C; G6: 20 seconds–50°C. In control group (G7), no treatment was performed. The DC was assessed using the Fourier transform infrared spectroscopy–attenuated total reflectance (FTIR–ATR) technique. For the transdentinal cytotoxicity test, dentin discs fitted in artificial pulp chambers (APC) received the application of the adhesive system and the air jets. For the microtensile bond strength, healthy molars were restored and submitted to the microtensile test after 24 hours and 6 months, respectively. Results: Significant reduction in viability of Mouse Dental Papilla Cell-23 (MDPC-23), which exhibited morphological changes, was observed in all experimental groups compared to control (p&lt;0.05). Although all tested protocols resulted in transdentinal diffusion of 2-hydroxyethyl methacrylate (HEMA), the group G6 presented the highest degree of monomeric conversion and the lowest cytotoxic effect, with higher dentin bond strength values in comparison to group G1 (p&lt;0.05). Conclusions: Applying an air blast at 50°C for 20 seconds increases the DC and microtensile bond strength of the 3M Single Bond Universal Adhesive System to dentin, as well as reduces the transdentinal cytotoxicity of the material to pulp cells.

scholarly journals Influence of a heating device and adhesive temperature on bond strength of a simplified ethanol-based adhesive system

2016 ◽  
Vol 45 (2) ◽  
pp. 97-102 ◽  
Author(s):  
Marcos Paulo Marchiori CARVALHO ◽  
Rachel de Oliveira ROCHA ◽  
Ivo KREJCI ◽  
Tissiana BORTOLOTTO ◽  
Fábio Ecke BISOGNO ◽  
...  
Keyword(s):  
Bond Strength ◽  
Adhesive System ◽  
Microtensile Bond Strength ◽  
Air Jet ◽  
Etch And Rinse ◽  
Significant Difference ◽  
The Mean ◽  
Acid Gel ◽  
One Way Anova ◽  
Warming Device

Abstract Introduction Increased adhesive temperature has been reported to promote solvent evaporation, reduce viscosity, and improve monomeric permeation into dentin. Objective The aim of this study was to determine the influence of different heating methods on the microtensile bond strength of an etch-and-rinse adhesive to dentin. Material and method Twenty-four caries-free extracted human third molars were transversally sectioned to expose a flat dentinal surface. The samples were etched with 37% phosphoric acid gel and divided into three groups (n = 8): 1) Control - the adhesive system (Adper Single Bond 2; 3M ESPE) was applied at room temperature; 2) Warming device - the adhesive was warmed to 37°C in a custom device before application; and 3) Warm air - the adhesive was warmed to 50°C with an air jet after application on dentin. The specimens were restored with a composite resin (Filtek Z250 A2, 3M ESPE) and prepared for microtensile bond strength testing, after 24 h in water storage. The data were subjected to one-way ANOVA and Tukey's test (p < 0.05). Result There was no significant difference among the groups (p > 0.05). The mean bond strength values in the control, the warming device, and the warm air groups were 48.5 (± 5.2), 40.35 (± 4.9), and 47.2 (± 5.3) MPa, respectively (p = 0.05). Conclusion The different heating methods had no significant influence on the immediate microtensile bond strength of an etch-and-rinse ethanol-based adhesive to dentin.

The effect of self-etching adhesive system associated with different energy densities of Nd:YAG laser on microtensile bond strength to dentin

2018 ◽  
Vol 2 (3) ◽  
pp. 157-162 ◽  
Author(s):  
Daphne Camara Barcellos ◽  
Priscila Holleben ◽  
Beatriz Maria Fonseca ◽  
Bruna de Cássia Sabino ◽  
Sérgio Eduardo de Paiva Gonçalves
Keyword(s):  
Bond Strength ◽  
Nd:Yag Laser ◽  
Adhesive System ◽  
Microtensile Bond Strength

scholarly journals Effect of Chlorhexidine and Ethanol Application on Longterm Push-out Bond Strength of Fiber Posts to Dentin

2015 ◽  
Vol 16 (7) ◽  
pp. 547-553 ◽  
Author(s):  
Roberta Tarkany Basting ◽  
Cecília Pedroso Turssi ◽  
Flavia Lucisano Botelho do Amaral ◽  
Fabiana Mantovani Gomes França ◽  
Rafaela Crystyan Vaneli ◽  
...  
Keyword(s):  
Bond Strength ◽  
Repeated Measures ◽  
Adhesive System ◽  
Resin Cement ◽  
Control Group ◽  
Test Analysis ◽  
Significance Level ◽  
Fiber Posts ◽  
Etch And Rinse ◽  
Push Out

ABSTRACT Aim The aim of this study was to evaluate the effect of chlorhexidine and ethanol application on the push-out bond strength and bond durability of fiber posts cemented with an etch-and-rinse adhesive system/resin cement to intraradicular dentin. Materials and methods Fifty-four bovine roots were shaped for the cementation of a fiberglass post and received the application of 37% phosphoric acid. They were then randomly divided into three groups, according to the type of dentin treatment (n = 18) performed: no treatment (control group), 100% ethanol, or 2% chlorhexidine. Next, the adhesive system (Adper Scotch Bond Multipurpose Plus, 3M ESPE) was applied to the dentin, according to the manufacturer's instructions. Glass fiber posts were cemented with dual resin cement (Rely X ARC, 3M ESPE). After 48 hours, the specimens were serially sectioned for push-out test analysis, providing two slices from each root third (cervical, medium and apical), one of which was tested immediately and the other stored in distilled water for 180 days. The data were analyzed with three-way analysis of variance (ANOVA) for repeated measures and Tukey's test at a 5% significance level. Results Intraradicular treatment with chlorhexidine yielded the highest bond strength means, followed by ethanol treatment. The control group presented the lowest bond strength means. Water storage exerted no effect on bond strength values. Conclusion Both chlorhexidine and ethanol improved push-out bond strength to intraradicular dentin, with the former providing the best results, regardless of the storage time. Clinical significance The application of 2% chlorhexidine or 100% ethanol may be an important step that can be taken to enhance bond strength of fiber posts to intraradicular dentin, when dual resin cements are used. How to cite this article França FMG, Vaneli RC, de Melo Conti C, Basting RT, do Amaral FLB, Turssi CP. Effect of Chlorhexidine and Ethanol Application on Long-term Pushout Bond Strength of Fiber Posts to Dentin. J Contemp Dent Pract 2015;16(7):547-553.

scholarly journals Microtensile Bond Strength of Methacrylate and Silorane Resins to Enamel and Dentin

2014 ◽  
Vol 25 (4) ◽  
pp. 327-331 ◽  
Author(s):  
Gisele Rodrigues da Silva ◽  
Isabela Sousa Araújo ◽  
Rodrigo Dantas Pereira ◽  
Bruno de Castro Ferreira Barreto ◽  
Célio Jesus do Prado ◽  
...  
Keyword(s):  
Bond Strength ◽  
Aging Time ◽  
Storage Time ◽  
Composite Resin ◽  
Glass Plate ◽  
Composite Resins ◽  
Microtensile Bond Strength ◽  
Bonding Interaction ◽  
Significant Difference ◽  
And Storage

The aim of this study was to evaluate the microtensile bond strength (µTBS) of two substrates (enamel and dentin) considering two study factors: type of composite resin [methacrylate-based (Filtek Supreme) or silorane-based (Filtek LS)] and aging time (24 h or 3 months). Twenty human molars were selected and divided into 2 groups (n=10) considering two dental substrates, enamel or dentin. The enamel and dentin of each tooth was divided into two halves separated by a glass plate. Each tooth was restored using both tested composite resins following the manufacturer's instructions. The samples were sectioned, producing 4 sticks for each composite resin. Half of them were tested after 24 h and half after 3 months. µTBS testing was carried out at 0.05 mm/s. Data were analyzed by three-way ANOVA and Tukey's HSD tests at α=0.05. Significant differences between composite resins and substrates were found (p<0.05), but no statistically significant difference was found for aging time and interactions among study factors. The methacrylate-based resin showed higher µTBS than the silorane-based resin. The µTBS for enamel was significantly higher than for dentin, irrespective of the composite resin and storage time. Three months of storage was not sufficient time to cause degradation of the bonding interaction of either of the composite resins to enamel and dentin.

scholarly journals Reinforcement of bond strength of self-etching orthodontic adhesive

2011 ◽  
Vol 82 (1) ◽  
pp. 30-35
Author(s):  
Shinya Horiuchi ◽  
Shingo Kuroda ◽  
Masahiro Hiasa ◽  
Toshiyuki Suge ◽  
Seitaro Saku ◽  
...  
Keyword(s):  
Citric Acid ◽  
Phosphoric Acid ◽  
Bond Strength ◽  
Polyacrylic Acid ◽  
Shear Bond Strength ◽  
Adhesive System ◽  
Control Group ◽  
Bonding System ◽  
Adhesive Remnant Index ◽  
Debonding Process

Abstract Objective: To determine the reinforcement of bond strength of a self-etching system by applying a pretreatment agent. Materials and Methods: Sixty extracted human premolars were used in this study. The enamel surfaces were treated with four pretreatment agents—phosphoric acid, polyacrylic acid, citric acid, and ammonium hexafluorosilicate (SiF)—and were examined under a scanning electron microscope. Afterward, orthodontic brackets were bonded with a self-etching adhesive system (n  =  10 for each agent), and shear bond strength was measured through a debonding process. The adhesive remnant index (ARI) was also assessed. Results: Enamel surfaces treated with polyacrylic acid seemed almost the same as intact enamel. Treatment with SiF induced slight shallow depressions compared with the intact enamel. On the other hand, enamel surfaces treated with citric acid and phosphoric acid showed severe etching patterns. All pretreatments increased the bond strength, but SiF-treated specimens revealed the greatest strength (12.201 ± 1.048 MPa), followed by polyacrylic acid (12.030 ± 2.103 MPa). The control group with no pretreatment showed the least strength (9.078 ± 1.678 MPa). All pretreatments increased ARI score compared with the control group. Conclusions: Surface conditioning before bracket adhesion could reinforce the bond strength of the self-etching adhesive system, resulting in a more reliable bonding system.

scholarly journals Effect of 2% Chlorhexidine Following Acid Etching on Microtensile Bond Strength of Resin Restorations: A Meta-Analysis

Medicina ◽  
2019 ◽  
Vol 55 (12) ◽  
pp. 769 ◽  
Author(s):  
Tasnim Hamdan-Nassar ◽  
Carlos Bellot-Arcís ◽  
Vanessa Paredes-Gallardo ◽  
Verónica García-Sanz ◽  
Agustín Pascual-Moscardó ◽  
...  
Keyword(s):  
Bond Strength ◽  
Meta Analysis ◽  
Experimental Studies ◽  
In Vivo Studies ◽  
Acid Etching ◽  
Control Group ◽  
Microtensile Bond Strength ◽  
Chlorhexidine Solution ◽  
Resin Restorations

Background and Objectives: The aim of this systematic review was to examine the effect of 2% chlorhexidine following acid etching on the microtensile bond strength of resin restorations for different follow-up times. Materials and Methods: A thorough search of PubMed, Scopus, and Embase databases were conducted. In vitro experimental studies or in vivo studies published up to December 2018 with an experimental group treated with a 2% chlorhexidine solution following acid etching and a control group were included, wherein the final restoration used a resin composite in both the groups. Results: Twenty-one articles were identified for qualitative analysis and 18 for meta-analysis. The difference in the means of microtensile bond strength between the two groups was calculated for the different follow-up times. The differences were significant for 6 months (4.30 MPa; 95% CI 2.72–5.89), 12 months (8.41 MPa; 95% CI 4.93–11.88), and 2–5 years including aged and thermocycling samples (9.08 MPa; 95% CI 5.36–12.81). There were no significant differences for the type of adhesive used. A meta-regression model showed a significant effect of time on the microtensile bond strength. Conclusions: The application of a 2% chlorhexidine solution after acid etching increased the microtensile bond strength significantly for follow-up times of 6 months or more. The adhesive type had no influence.

Sign in / Sign up

Export Citation Format

Share Document