scholarly journals Effect of an hydrophobic layer on a universal adhesive

2018 ◽  
Vol 66 (4) ◽  
pp. 339-344
Author(s):  
Mayara Farah Dallin SERAFIM ◽  
Adriana Mara Araújo LEAL ◽  
José BAUER ◽  
Isabella Azevedo GOMES ◽  
Karina Gama Kato CARNEIRO
Keyword(s):  
Bond Strength ◽  
Adhesive Layer ◽  
Adhesive System ◽  
Control Group ◽  
Test Machine ◽  
Distilled Water ◽  
Universal Adhesive ◽  
Significant Difference ◽  
Ethical Approval ◽  
Hydrophobic Layer

ABSTRACT Objective: evaluate bond strength of a universal adhesive, associated to an extra hydrophobic sealing layer, and compare after three and six months immersed in distilled water. Methods: After ethical approval of the CEP / HUUFMA, 12 human third molars (n = 6) were extracted, which were divided into two groups: SB - control group - selfetching; and SBHidrof - selfetching group associated to the hydrophobic layer (Adhesive layer, 3m ESPE). After incremental restoration with composite resin (Opalis, FGM), the teeth were sliced to obtain specimens (1mm2) and then submitted to the universal test machine (INSTRON 1mm / min.), immediate and after three and six months. The data were submitted to normality (Shapiro Wilk), and comparative Analysis of variance (two ways: technique and time) and Tukey (p <0.05). Results Immediate values showed no statistically significant difference (p> 0.05), but after three and six months of immersion of the specimens, in distilled water, bond strength values were maintained in the group that received the hydrophobic layer (p<0.05). Conclusion: It was observed that, by incorporating a hydrophobic layer on a universal adhesive system, it was possible to preserve dentin adhesion.

scholarly journals Effect of saliva contamination and re-etching time on the shear bond strength of a pit and fissure sealant

2004 ◽  
Vol 12 (3) ◽  
pp. 200-204 ◽  
Author(s):  
Gisele Maria Correr ◽  
Angela S. Caldo-Teixeira ◽  
Roberta Caroline Bruschi Alonso ◽  
Regina Maria Puppin-Rontani ◽  
Mário Alexandre Coelho Sinhoreti ◽  
...  
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Etching Time ◽  
Control Group ◽  
Distilled Water ◽  
Third Molars ◽  
Fissure Sealant ◽  
Significant Difference ◽  
Pit And Fissure Sealant ◽  
Saliva Contamination

The aim of this study was to evaluate the effect of saliva contamination (SCT) and re-etching time (RET) on the shear bond strength (SBS) of the Fluroshield sealant. Forty-five extracted third molars were sectioned and flattened until reach an enamel surface area. Then, all samples were etched for 30 sec with 35% phosphoric acid and then they were distributed into 9 groups (n=10) according to SCT and RET (seconds), respectively: G1- control (no SCT and no RET); G2- 30s and 0s; G3- 60s and 0s; G4-30s and 2s; G5- 30s and 5s; G6- 30s and 15s; G7-60s and 2s; G8- 60s and 5s; G9- 60s and 15s. The sealant was applied according to the manufacturer's instructions. The samples were stored in distilled water at 37ºC for 72h and subjected to the SBS test. The results indicated that there was no statistically significant difference between the groups (p>0.05). However, it could be noticed that: 1- the longer the SCT, the lower the SBS values; 2 - the longer the RET, the higher the SBS values. It could be concluded that there was a tendency to the shortest SCT (30s) associated to the longest RET (5 and 15s) to reach similar SBS values for the control group.

scholarly journals Shear Strength of Brackets Bonded with Universal Adhesive Containing 10-MDP after 20,000 Thermal Cycles

2020 ◽  
Vol 2020 ◽  
pp. 1-7
Author(s):  
Mariana Almeida Mello Proença ◽  
Karime Tavares Lima da Silva ◽  
Alisson Costa e Silva ◽  
Edilausson Moreno Carvalho ◽  
José Bauer ◽  
...  
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Dental Enamel ◽  
Adhesive System ◽  
Test Machine ◽  
Adhesive Systems ◽  
Thermal Cycles ◽  
Universal Adhesive ◽  
Adhesive Remnant Index ◽  
One Way Anova

Objectives. The aim of this study was to evaluate the shear bond strength of metal brackets bonded with different universal adhesive systems containing 10-MDP and Transbond Plus Self Etching Primer after 20,000 thermal cycles. Materials and Methods. A total of 130 sound bovine teeth were used, which are divided into 5 groups (n = 26) according to the adhesive system used: All-Bond Universal (Bisco), Ambar Universal (FGM), Clearfil Universal Bond (Kuraray), Single Bond Universal (3M/ESPE), and Transbond Plus SEP (3M/ESPE) as control. The adhesives were applied for 20 seconds and bonded with a resin Transbond XT (3M/ESPE). After this, the teeth were submitted to 20,000 cycles at 5°C and 55°C. Afterwards, the shear bond strength test was performed in a universal test machine (Instron 3342). The adhesive remnant index (ARI) was evaluated under a stereomicroscope at 10x magnification and scanning electronic microscopy (SEM, Hitachi 3030). The shear bond strength data were submitted to One-Way ANOVA (α = 0.05) and the ARI to the Kruskal–Wallis test (α = 0.05). Results. Statistical analysis showed that the universal adhesive systems presented mean shear bond strength values similar to Transbond Plus SEP (p<0.05). The universal adhesive presented similar ARI values among them but differed from those of Transbond Plus SEP (p<0.001). Transbond Plus SEP presented a high ARI value when compared with the universal adhesive systems and high demineralization of enamel. Conclusions. The results show that universal adhesive systems may be used for bonding metal brackets if the orthodontist wants to maintain dental enamel health.

scholarly journals The effects of different surface contaminators on the shear bond strength of a universal adhesive system to dentin: an experimental study

2021 ◽  
Vol 15 (2) ◽  
pp. 82-86
Author(s):  
Mahmoud Bahari ◽  
Siavash Savadi Oskoee ◽  
Mohammad Esmaeel Ebrahimi Chaharom ◽  
Nasim Molayi
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Adhesive System ◽  
Aluminium Chloride ◽  
Control Group ◽  
Universal Adhesive ◽  
Human Teeth ◽  
Etch And Rinse ◽  
Self Etch ◽  
Composite Samples

Background. Contamination of dentin surface is one of the common problems in restorative dentistry. The aim was to investigate the effects of different surface contaminators on the dentin shear bond strength (SBS) of universal adhesive system (UAS) applied in etch-and-rinse (ER) and self-etch (SE) strategies. Methods. One hundred forty-four maxillary anterior sound human teeth were divided into six groups based on the types of surface contaminators: no surface contaminator (control) and experimental groups contaminated with blood, saliva, aluminium chloride (ALC), ferric sulphate (FS), and caries disclosing agent (CDA). Then, each group was further subdivided into two, based on the application strategy of UAS (ER and SE). After applying the adhesive according to the manufacturer’s instructions, and bonding cylindrical composite samples, the SBS was measured. The data were analysed using two-way ANOVA, Tukey’s HSD test and t test (P<0.05). Results. The SBS in all contaminated groups, except for CDA, was significantly lower in both ER and SE strategies compared to control group (P<0.05). A comparison between the application strategies revealed that ER and SE were only significantly different in the FS contaminated group (P<0.05). Conclusion. All tested contaminators, except CDA, significantly decreased SBS of UAS in both ER and SE strategies.

The Efficacy of Different Sealer Removal Protocols on the Microtensile Bond Strength of Adhesives to a Bioceramic Sealer-Contaminated Dentin

2021 ◽  
Author(s):  
Zeliha Gonca Bek Kürklü ◽  
Oğuz Yoldaş
Keyword(s):  
Bond Strength ◽  
Root Canal ◽  
Calcium Silicate ◽  
Single Step ◽  
Cavity Surface ◽  
Control Group ◽  
Root Canal Sealer ◽  
Universal Adhesive ◽  
Significant Difference ◽  
Bond Strengths

Abstract Background: The optimal bonding of adhesives to dentin requires the sealer to be completely removed from dentinal walls. This study compared the efficacy of different sealer removal protocols on the microtensile bond strengths (MTBS) of single step adhesives to a calcium silicate-based bioceramic root canal sealer contaminated dentin. Methods: Standardized box-shaped Class I cavities were prepared in human lower third molars (N=50). All cavities were contaminated with a bioceramic root canal sealer (Endosequence BC Sealer, Brasseler, Savannah, USA), except the control group cavities. For the experimental groups, dentin surfaces were wiped with dry cotton pellets, cotton pellets saturated with water or rinsed with an air water syringe for 5 seconds, or applied aqueous ultrasonic scaler for 5 seconds prior to restoration procedure. All the cavity surface was restored with a one-bottle universal adhesive and composite resin. All the specimens were subjected to both thermocycling and mechanical loading. The restored specimens were sectioned into resin-dentin beams for mictotensile bond strength (Mtbs) evaluation. Additional specimens were prepared for scanning electron microscopy (SEM) to examination of dentin-adhesive interface (N=10).Results: The Mtbs for the 5 groups, the control, dry cotton, wet cotton, water rinse, and ultrasonic rinse group, were 13.42 ± 4.68, 11.96 ± 5.26, 13.03±6.07, 12.73±3.68, and 14.39±4.22 MPa, respectively. No significant difference was found between the mean bond strengths of the groups (p=0.725). In SEM examination no residual sealer was found in any group. Conclusions: Calcium silicate-based bioceramic sealer was removed from the dentin surface with all removal protocols when evaluated with Mtbs after thermal and mechanical cycle tests.

scholarly journals Effect of Intracanal Medicaments on Pull-Out Bond Strength of Fiber Post Cemented with a Self-Adhesive System

2019 ◽  
Vol 13 (03) ◽  
pp. 420-425
Author(s):  
Pegah Sarraf ◽  
Atoosa Assadi ◽  
Nazanin Kiomarsi ◽  
Fatemeh Mohammadian ◽  
Arsalan Assadi ◽  
...  
Keyword(s):  
Bond Strength ◽  
Adhesive System ◽  
Analysis Data ◽  
Control Group ◽  
Fiber Post ◽  
Root Canals ◽  
Pull Out ◽  
Fiber Posts ◽  
Significant Difference ◽  
Glass Fiber Posts

Abstract Objectives This study aimed to assess the effect of four intracanal medicaments on pull-out bond strength of fiber posts. Materials and Methods A total of 65 single-rooted, single-canal teeth were selected and decoronated. Root canals were prepared and after rinsing were randomly divided into five groups (n = 13). G1: calcium hydroxide (CH), G2: CH plus chlorhexidine (CH+CHX), G3: triple antibiotic paste (TAP), G4: double antibiotic paste (DAP) were applied in the canals in the four groups. The control group (G5) received no medicament. After 4 weeks, the medicaments were rinsed off and the canals were filled with gutta-percha. Post space was then prepared in root canals for the placement of glass fiber posts and self-adhesive cement (Panavia F2). After cementation, they were subjected to pull-out bond strength test. Statistical Analysis Data were statistically analyzed using one-way analysis of variance and Tukey test.Results The pull-out bond strength values were significantly different in the groups (p < 0.001). The highest values of bond strength were seen in G2, G1, and G3 (359.97 ± 81.26, 333.79 ± 98.96, 309.27 ± 78.07), respectively. There was no significant difference between G4 and G5 (p = 0.75). Conclusion The results showed that CH, CH+CHX, and TAP enhanced the pull-out bond strength of fiber post to root canal wall as compared to the control group.

scholarly journals Simplified Surface Treatments for Ceramic Cementation: Use of Universal Adhesive and Self-Etching Ceramic Primer

2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
Heloísa A. B. Guimarães ◽  
Paula C. Cardoso ◽  
Rafael A. Decurcio ◽  
Lúcio J. E. Monteiro ◽  
Letícia N. de Almeida ◽  
...  
Keyword(s):  
Bond Strength ◽  
Surface Treatment ◽  
Hydrofluoric Acid ◽  
Shear Bond Strength ◽  
Strength Test ◽  
Surface Treatments ◽  
Resin Cement ◽  
Test Machine ◽  
Universal Adhesive ◽  
Significant Difference

The aim of this study was to evaluate the shear bond strength of resin cement and lithium disilicate ceramic after various surface treatments of the ceramic. Sixty blocks of ceramic (IPS e.max Press, Ivoclar Vivadent) were obtained. After cleaning, they were placed in polyvinyl chloride tubes with acrylic resin. The blocks were divided into six groups (n=10) depending on surface treatment: H/S/A - 10% Hydrofluoric Acid + Silane + Adhesive, H/S -10% Hydrofluoric Acid + Silane, H/S/UA - 10% Hydrofluoric Acid + Silane + Universal Adhesive, H/UA- 10% Hydrofluoric Acid + Universal Adhesive, MBEP/A - Monobond Etch & Prime + Adhesive, and MBEP - Monobond Etch & Prime. The light-cured resin cement (Variolink Esthetic LC, Ivoclar Vivadent) was inserted in a mold placed over the treated area of the ceramics and photocured with an LED for 20 s to produce cylinders (3 mm x 3 mm). The samples were subjected to a shear bond strength test in a universal test machine (Instron 5965) by 0.5 mm/min. ANOVA and Tukey tests showed a statistically significant difference between groups (p<0.05). The results of the shear strength test were H/S/A (9.61±2.50)A, H/S (10.22±3.28)A, H/S/UA (7.39±2.02)ABC, H/UA (4.28±1.32)C, MBEP/A (9.01±1.97)AB, and MBEP (6.18±2.75)BC. The H/S group showed cohesive failures, and the H/UA group was the only one that presented adhesive failures. The conventional treatment with hydrofluoric acid and silane showed the best bond strength. The use of a new ceramic primer associated with adhesive bonding obtained similar results to conventional surface treatment, being a satisfactory alternative to replace the use of hydrofluoric acid.

scholarly journals Bond strength of orthodontic brackets to polymethylmethacrylate: effect of the surface treatment and adhesive system

2021 ◽  
Vol 62 (1) ◽  
Author(s):  
Rita Cardoso ◽  
◽  
Joana Godinho ◽  
Luís Jardim ◽  
◽  
...  
Keyword(s):  
Bond Strength ◽  
Aluminum Oxide ◽  
Surface Treatment ◽  
Failure Mode ◽  
Shear Bond Strength ◽  
Adhesive System ◽  
Orthodontic Brackets ◽  
Control Group ◽  
Universal Adhesive ◽  
Machine Failure

Objectives: To evaluate the influence of the surface treatment and adhesive system on the shear bond strength and the failure mode of orthodontic brackets bonded to polymethylmethacrylate surfaces. Methods: Ninety metal brackets (n=15) were bonded to aged discs of polymethylmethacrylate SR Ivocron subjected to three surface conditions (no treatment; sandblasting with 50-μm aluminum oxide; roughening with a tungsten bur), using two combinations of adhesives (methylmethacrylate monomer + Transbond XT Primer; Scotchbond Universal Adhesive) followed by the composite Transbond XT. In the control group, metal brackets were bonded with Transbond XT to 15 human mandibular incisors. The specimens were thermocycled, stored in distilled water (37ºC, 7 days), and tested in shear, using an Instron universal machine. Failure mode was classified according to the adhesive remnant index using a stereomicroscope. The data were analyzed with an analysis of variance and posthoc tests (p<0.05). Results: Significant differences were found between the bracket bond strength to polymethylmethacrylate with different surface treatments (p<0.001). Sandblasting with aluminum oxide was superior to tungsten bur roughening. The adhesive system did not significantly influence the shear bond strength nor the failure mode (p=0.8415). All experimental groups showed lower bond strengths than the control group (p=0.1566). Conclusions: Mechanical surface treatment significantly influenced the bracket’s bond strength to polymethylmethacrylate. Sandblasting with aluminum oxide was the most effective mechanical treatment. The weakest adhesive link was found at the acrylic-adhesive interface. Orthodontic bonding to polymethylmethacrylate was weaker than bonding to enamel, regardless of the surface treatment and the adhesive used.

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 Bond Strength and Cytotoxicity of a Universal Adhesive According to the Hybridization Strategies to Dentin

2018 ◽  
Vol 29 (1) ◽  
pp. 68-75 ◽  
Author(s):  
Maria Luísa de Alencar e Silva Leite ◽  
Carlos Alberto de Souza Costa ◽  
Rosângela Marques Duarte ◽  
Ana Karina Maciel de Andrade ◽  
Diana Gabriela Soares
Keyword(s):  
Bond Strength ◽  
Cell Viability ◽  
Cultured Cells ◽  
Resin Composite ◽  
Adhesive Layer ◽  
Adhesive System ◽  
Negative Control ◽  
Hybrid Layer ◽  
Universal Adhesive ◽  
Etch And Rinse

Abstract This study evaluated application protocol (etch-and-rinse/ER and self-etching/SE) and dentin wettability (wet and dry) on microtensile bond strength (μTBS) and transdentinal cytotoxicity of ScotchbondTM Universal (SU) adhesive system. The μTBS values and fracture mode were registered 24 h after adhesive system application and resin composite block build-up (n=5). For analysis of transdentinal cytotoxicity, odontoblast-like MDPC-23 cells were seeded on pulpal surface of dentin discs (0.4 mm thick) adapted to artificial pulp chambers (n=8). The adhesive system was applied to occlusal surface, followed by 24-h incubation time. Cell viability (Alamar Blue) and morphology (SEM) were assessed. Adper Single Bond 2 and Clearfil SE Bond were used as positive controls of the ER and SE application protocols, respectively. No treatment was performed on negative control (NC) group. Data were analyzed by ANOVA and Tukey’s tests (α=5%). Higher μTBS values were found for ER mode in comparison with SE protocol (p<0.05). Dentin wettability had no effect on bond strength of SU in both the ER and SE techniques (p>0.05). Most fractures involved hybrid layer and/or adhesive layer. Neither variable prevented the intense toxic effects of adhesive systems on MDPC-23 cultured cells, since intense reduction in cell viability (±88%) and severe alterations in cell morphology were observed for all groups compared to NC, with no differences among them (p>0.05). Therefore, it was concluded that application of SU following the ER protocol had better adhesive performance. However, this adhesive system featured intense transdentinal cytotoxicity to pulp cells, regardless of application protocol and dentin wettability.

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