scholarly journals Effect of ultrasonic vibration on microshear bond strength of flowable composite to enamel

2020 ◽  
Vol 24 (1) ◽  
Author(s):  
Mahtab Ebrahimi Nezhad ◽  
Dana Jafarpour ◽  
Mahdi Gholamrezaei Saravi
Keyword(s):  
Bond Strength ◽  
Ultrasonic Vibration ◽  
Shear Bond Strength ◽  
Internal Diameter ◽  
Bonding Agents ◽  
Vibration Effect ◽  
Flowable Composite ◽  
Significant Difference ◽  
Microshear Bond Strength ◽  
Flowable Composites

Objective: The present study aimed to assess the influence of vibration effect on microshear bond strength (µSBS) of flowable composite to enamel. Material and Methods: Sixty non-carious extracted human premolar teeth were collected and randomly divided into six groups (n = 10) after being trimmed to produce a smooth flat surface: Flowable composites [Wave (SDI), Wave HV (SDI) and Grandioflow (Voco)] were used as bonding agents without or with vibration using an ultrasonic scaler (Mini Piezon, EMS, Switzerland). Composite resin, with an internal diameter of 0.7mm and height of 1mm, was cured on the substrate. The specimens’ µSBS was tested by a microtensile tester (Bisco, USA) at a crosshead speed of 0.5 mm/min. The bond strength values were analyzed using one-way ANOVA and post hoc Tukey test (p < 0.05). Results: Vibration did not lead to any significant difference in the µSBS values of Wave, Wave HV, and Grandio Flow µSBS values (P=0.690, P=1.000 and P=0.947, respectively). No significant difference was found between flowable composites in terms of micro shear bond strength to enamel (p > 0.05). Conclusions: The application of ultrasonic vibration might not be advantageous in terms of improving the shear bond strength of flowable composites to enamel. KEYWORDS Bond strength; Enamel; Flowable composite; Ultrasonic; Vibration.

scholarly journals Microshear Bond Strength of a Self-adhesive Composite to Erbium Laser-Treated Primary Enamel

2020 ◽  
Vol 11 (2) ◽  
pp. 181-186
Author(s):  
Tara Zarabian ◽  
Saba Azadi Mood ◽  
Nazanin Kiomarsi ◽  
Homa Noorollahian ◽  
Neda Hakimiha
Keyword(s):  
Bond Strength ◽  
Surface Treatment ◽  
Laser Irradiation ◽  
Testing Machine ◽  
Enamel Surface ◽  
Flowable Composite ◽  
Significant Difference ◽  
Microshear Bond Strength ◽  
Flowable Composites

Introduction: Advances have been made in the composition of flowable composites in recent years and self-adhering composites, which do not require a bonding agent, have recently been introduced to the market. This study aimed to assess the microshear bond strength (µSBS) of a self-adhering flowable composite (Vertise) to primary enamel treated with a graphite disc with silicon carbide particles (SIC) and laser irradiation, the result of which was compared to that of a conventional flowable composite (Premise). Methods: In this in vitro, experimental study, 72 samples of sound primary enamel were evaluated. A smooth enamel surface was obtained using a graphite disc. Next, the erbium chromium yttrium scandium gallium garnet (Er,Cr:YSGG) laser was used for enamel surface treatment in half of the samples (n=36). All the samples were then randomly divided into 4 groups of (i) Premise flowable composite (PF) without laser (n=18), (ii) Vertise flowable composite (VF) without laser (n=18), (iii) PF with laser (n=18), and (iv) VF with laser (n=18). The teeth were then incubated at 37°C for 24 hours and were then subjected to thermocycling. The µSBS of samples was measured using a universal testing machine and reported in megapascal (MPa). Data were analyzed using SPSS via the two-way ANOVA and independent-samples t test at P<0.05. Results: The mean µSBS of VF was significantly higher to the laser-treated samples (13.60±5.47) compared with the non-treated samples (5.89±2.42) (P<0.001). However, no significant difference was noted in the µSBS of PF to the laser-treated (13.18±3.45) and non-treated samples (16.06±3.52) (P=0.058). Conclusion: The µSBS of the conventional flowable composite is higher than that of the selfadhering flowable composite to the enamel of primary teeth. Enamel surface treatment with laser irradiation increases the µSBS of self-adhering flowable composites.

scholarly journals Comparative Evaluation of the Shear Bond Strength and Debonding Properties of a Conventional Composite and Flowable Composites used for Orthodontic Bracket Bonding

2013 ◽  
Vol 4 (1) ◽  
pp. 6-16 ◽  
Author(s):  
BM Shivalinga ◽  
S Pradeep ◽  
Ravi Shanthraj ◽  
H Jyothi Kiran
Keyword(s):  
Stainless Steel ◽  
Bond Strength ◽  
Comparative Evaluation ◽  
Shear Bond Strength ◽  
Orthodontic Bracket ◽  
Group Iii ◽  
Flowable Composite ◽  
Group I ◽  
Adhesive Remnant Index ◽  
Flowable Composites

ABSTRACT Aim To evaluate and compare shear bond strength (SBS) and debonding characters of the Transbond XT (BisGMA-based composite), Esthet-X flow (flowable composite), Filtek Z-350 (flowable composite). Materials and methods A total of 90 human premolars were divided into group I, Transbond XT (n = 30); group II, Esthet-X flow (n = 30) and group III, Filtek Z-350 (n = 30), the preadjusted edgewise stainless steel premolar brackets were bonded to evaluate the shear bond and debonding properties. Results The results of the statistical analysis comparing the three groups indicated no statistically significant differences between the groups. In general, the SBS with groups I and III exhibited similar bond strength with 11.58 ± 1.3 MPa and 11.07 ± 1.0 MPa respectively. Groups III exhibited least bond strength of 10.7 ± 2 MPa. In modified adhesive remnant index (ARI) the majority of bond failures occurred at enamel-adhesive interface or cohesive type failure in all the three groups. Groups II and III showed increased frequency of score 2, 4 and 5 compared to group I which showed increased frequency of score 0 and 1. Conclusion When considering the SBS and ARI scores obtained, flowable composites can be effectively applied to orthodontic bracket bonding. How to cite this article Pradeep S, Shanthraj R, Kiran HJ, Shivalinga BM. Comparative Evaluation of the Shear Bond Strength and Debonding Properties of a Conventional Composite and Flowable Composites used for Orthodontic Bracket Bonding. World J Dent 2013;4(1):6-16.

scholarly journals Properties of Composite Materials Used for Bracket Bonding

2013 ◽  
Vol 24 (3) ◽  
pp. 279-283 ◽  
Author(s):  
Ana Caroline Silva Gama ◽  
Andre Guaraci de Vito Moraes ◽  
Lilyan Cardoso Yamasaki ◽  
Alessandro Dourado Loguercio ◽  
Ceci Nunes Carvalho ◽  
...  
Keyword(s):  
Flexural Strength ◽  
Bond Strength ◽  
Shear Bond Strength ◽  
Stress Test ◽  
Flexural Modulus ◽  
Significant Difference ◽  
Contraction Stress ◽  
Materials Used ◽  
Flowable Composites

The purpose of this study was to evaluate in vitro the shear bond strength to enamel, flexural strength, flexural modulus, and contraction stress of one orthodontic composite and two flowable composites. Orthodontic brackets were bonded to 45 human maxillary premolars with the composites Transbond XT, Filtek Z-350 flow and Opallis flow and tested for shear bond strength. For measurement of flexural strength and flexural modulus, specimens were fabricated and tested under flexion. For the contraction stress test, cylindrical specimens were tested and an extensometer determined the height of the specimens. The data were subjected to one-way ANOVA and Tukey's test (α=0.05). The shear bond strength values were significantly lower (p<0.05) for the flowable composites compared with the orthodontic composite. For the flexural strength, no statistically significant difference was found among the composites (p>0.05) while the flexural modulus was significantly higher (p<0.05) for Transbond XT than for Filtek Z-350 flow and Opallis flow. The orthodontic composite presented significantly lower contraction stress values than the flowable composites (p<0.05). The light-activated orthodontic composite material presented higher flexural modulus and shear bond strength and lower contraction stress than both flowable composites.

scholarly journals Co-Blend Application Mode of Bulk Fill Composite Resin

Materials ◽  
2019 ◽  
Vol 12 (16) ◽  
pp. 2504
Author(s):  
Mohammad Al-Nabulsi ◽  
Alaa Daud ◽  
Cynthia Yiu ◽  
Hanan Omar ◽  
Salvatore Sauro ◽  
...  
Keyword(s):  
Bond Strength ◽  
Composite Resin ◽  
Degree Of Conversion ◽  
Adhesive Systems ◽  
Bonding Agents ◽  
Force Microscopy ◽  
Flowable Composite ◽  
Etch And Rinse ◽  
Significant Difference ◽  
Nanoindentation Hardness

Objective: To evaluate the effect of a new application method of bulk-fill flowable composite resin material on bond-strength, nanoleakage, and mechanical properties of dentine bonding agents. Materials and methods: Sound extracted human molars were randomly divided into: manufacturer’s instructions (MI), manual blend 2 mm (MB2), and manual blend 4 mm (MB4). Occlusal enamel was removed and flattened, dentin surfaces were bonded by Prime & Bond universal (Dentsply and Optibond FL, Kerr). For the MI group, adhesives were applied following the manufacturer’s instructions then light-cured. For MB groups, SDR flow+ bulk-fill flowable composite resin was applied in 2- or 4-mm increment then manually rubbed by a micro brush for 15 s with uncured dentine bonding agents and the mixture was light-cured. Composite buildup was fabricated incrementally using Ceram.X One, Dentsply nanohybrid composite resin restorative material. After 24-h water storage, the teeth were sectioned to obtain beams of about 0.8 mm2 for 24-h and thermocycled micro-tensile bond strength at 0.5 mm/min crosshead speed. Degree of conversion was evaluated with micro-Raman spectroscopy. Contraction gaps at 24 h after polymerization were evaluated and atomic force microscopy (AFM) nano-indentation processes were undertaken for measuring the hardness across the interface. Depth of resin penetration was studied using a scanning electron microscope (SEM). Bond strength data was expressed using two-way ANOVA followed by Tukey’s test. Nanoindentation hardness was separately analyzed using one-way ANOVA. Results: Factors “storage F = 6.3” and “application F = 30.11” significantly affected the bond strength to dentine. For Optibond FL, no significant difference in nanoleakage was found in MI/MB4 groups between baseline and aged specimens; significant difference in nanoleakage score was observed in MB2 groups. Confocal microscopy analysis showed MB2 Optibond FL and Prime & Bond universal specimens diffusing within the dentine. Contraction gap was significantly reduced in MB2 specimens in both adhesive systems. Degree of conversion (DC) of the MB2 specimens were numerically more compared to MS1 in both adhesive systems. Conclusion: Present study suggests that the new co-blend technique might have a positive effect on bond strengths of etch-and-rinse adhesives to dentine.

scholarly journals Shear Bond Strength of Self-Adhesive Flowable Composite, Conventional Flowable Composite and Resin-Modified Glass Ionomer Cement to Primary Dentin

2019 ◽  
Author(s):  
Kiana Poorzandpoush ◽  
Mehdi Shahrabi ◽  
Alireza Heidari ◽  
Zohre Sadat Hosseinipour
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Glass Ionomer Cement ◽  
Glass Ionomer ◽  
Adhesive Failure ◽  
Flowable Composite ◽  
Significant Difference ◽  
Resin Modified Glass Ionomer ◽  
Group 3 ◽  
Ionomer Cement

Objectives: This study aimed to compare the shear bond strength (SBS) of self-adhesive and conventional flowable composites and resin-modified glass-ionomer cement (RMGIC) to primary dentin. Materials and Methods: In this in vitro, experimental study, the buccal surface of 48 primary canine and first molar teeth was longitudinally sectioned to expose dentin. The teeth were randomly divided into three groups (n=16) of 37.5% phosphoric acid+ OptiBond+ Premise Flow composite (group 1), Vertise Flow composite (group 2) and RMGIC (group 3). A plastic cylindrical mold was placed on the exposed dentin and filled with restorative materials. The samples were then immersed in distilled water at 37°C for 24 hours, subjected to 1000 thermal cycles between 5-55°C and underwent SBS test. The mode of failure was determined under a stereomicroscope. Data were analyzed using one-way ANOVA and Tukey’s test. Results: A significant difference was noted in SBS of the groups (P<0.05). The SBS of conventional flowable composite was significantly higher that of RMGIC and self-adhesive flowable composite (P<0.05). The difference in SBS of RMGIC and self-adhesive flowable composite was not significant (P>0.05). Failure at the dentin-restoration interface (adhesive failure) had the highest frequency in groups 1 and 2. The frequency of adhesive failure was 100% in group 3. Conclusions: Within the limitations of this study, the conventional flowable composite yielded the highest SBS to primary dentin. Self-adhesive flowable composite and RMGIC showed the lowest SBS with no significant difference with each other.

scholarly journals Evaluation of Microshear Bond Strength of Self-Adhesive Versus Conventional Flowable Resin Composite to Sound and Affected Dentin: An In Vitro Study

2021 ◽  
Vol 11 (4) ◽  
pp. 306-312
Author(s):  
Dalia M. Abouelmagd ◽  
Hanan K. Abouelseoud
Keyword(s):  
Bond Strength ◽  
Resin Composite ◽  
In Vitro Study ◽  
Vitro Study ◽  
Flowable Composite ◽  
Significant Difference ◽  
The Mean ◽  
Microshear Bond Strength ◽  
Vertise Flow

Objectives: This study aimed to compare the microshear bond strength (µSBS) of self-adhesive flowable composite and conventional bonded flowable composite to sound and caries affected dentin. Materials and Methods: In this in vitro study, a total of freshly extracted 40 human molar teeth were used. The occlusal surface was sectioned to expose dentin for µSBS test. The teeth were randomly divided into 2 groups according to the type of flowable composite used into two groups (n=20): group A: self- adhesive flowable composite (Vertise flow), group B: Filtek Z350-XT flowable composite and one-step self-etch adhesive Adper Easy One. A plastic cylindrical mold was used to construct resin composite cylinders (0.8mm diameter x 1mm length) on the sound and caries affected exposed dentin and filled with flowable composite restorative materials according to manufacturer’s instructions. The samples were then immersed in distilled water at 37°C for 24 hours, and underwent µSBS test at a crosshead speed of 0.5 mm/min. Data were analyzed using Student's t-test to compare between the two materials as well as to compare between sound and caries affected dentin. Results: The mean values of µSBS of Filtek Z-350XT to sound and caries affected were 26.6 and 26.7 MPa respectively. The mean µSBS of Vertise Flow to sound and affected were 13.2 and 17.9 MPa respectively. With sound dentin FiltekZ-350XT showed statistically significant higher µSBS than Vertise flow. With caries affected dentin, there was no statistically significant difference between the two materials. There was no statistically significant difference between µSBS of sound and caries affected dentin within each material. The significance level was set at P ≤ 0.05. Conclusions: Within the limitations of this study, the conventional flowable composite yielded the highest µSBS to sound dentin. There was no statistical significant difference in µSBS of self-adhesive and conventional flowable to caries affected dentin. Key words: Composite Resins; Dentin; microshear.

scholarly journals Comparing Shear Bond Strength of Two Step vs One Step B onding Agents on Ground Enamel and Dentin: An in vitro Study

2014 ◽  
Vol 3 (1) ◽  
pp. 1-3
Author(s):  
Shubhangi Mani ◽  
Darshan Deepak Shah ◽  
Narendra Manwar ◽  
Rushabh Malde
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Testing Machine ◽  
Single Bond ◽  
Universal Adhesive ◽  
Bonding Agents ◽  
Ground Enamel ◽  
Significant Difference ◽  
One Step

ABSTRACT Aim To compare the shear bond strength of Tetric N Bond (Ivoclar Vivadent) and Single Bond Universal Adhesive (3M ESPE, MN, USA) on ground enamel and dentin. Materials and methods A total of 30 extracted human maxillary and mandibular molars and premolars were used for this study and divided into two groups which were treated with Tetric N Bond (Ivoclar Vivaden) t- and Single Bond Universal Adhesive (3M ESPE, MN, USA). The shear bond strength was tested on Universal testing machine (Instron). Results There was statistically significant difference in the shear bond strength among the two groups. Conclusion Based on the results (Tetric N Bond, Ivoclar Vivadent) had higher bond strength than Single Bond Universal Adhesive (3M ESPE, MN, USA) on ground enamel and dentin. How to cite this article Shah DD, Chandak M, Manwar N, Mani S, Mani A, Saini R, Malde R. Comparing Shear Bond Strength of Two Step vs One Step Bonding Agents on Ground Enamel and Dentin: An in vitro Study. Int J Experiment Dent Sci 2014;3(1):1-3.

scholarly journals Relationships between Flexural and Bonding Properties, Marginal Adaptation, and Polymerization Shrinkage in Flowable Composite Restorations for Dental Application

Polymers ◽  
2021 ◽  
Vol 13 (16) ◽  
pp. 2613
Author(s):  
Akimasa Tsujimoto ◽  
Masao Irie ◽  
Erica Cappelletto Nogueira Teixeira ◽  
Carlos Alberto Jurado ◽  
Yukinori Maruo ◽  
...  
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Early Stage ◽  
Flexural Properties ◽  
Marginal Adaptation ◽  
Polymerization Shrinkage ◽  
Flowable Composite ◽  
Composite Restorations ◽  
Bonding Properties ◽  
Flowable Composites

To evaluate the flexural and bonding properties, marginal adaptation, and polymerization shrinkage in flowable composite restorations and their relationships, four new generation flowable composites, one conventional, and one bulk-fill flowable composite were used in this study. Flexural properties of the composites and shear bond strength to enamel and dentin for flowable restorations were measured immediately and 24 h after polymerization. Marginal adaptation, polymerization shrinkage, and stress were also investigated immediately after polymerization. The flexural properties, and bond strength of the flowable composites to enamel and dentin were much lower immediately after polymerization than at 24 h, regardless of the type of the composite. Polymerization shrinkage and stress varied depending on the material, and bulk-fill flowable composite showed much lower values than the others. The marginal adaptation and polymerization shrinkage of the composites appeared to have a much stronger correlation with a shear bond strength to dentin than to enamel. The weak mechanical properties and bond strengths of flowable composites in the early stage after polymerization must be taken into account when using them in the clinic. In addition, clinicians should be aware that polymerization shrinkage of flowable composites can still lead to the formation of gaps and failure of adaptation to the cavity regardless of the type of composite.

scholarly journals Effect of Adhesion Booster on Fluoride-releasing Composite: An in vitro Study

2018 ◽  
Vol 7 (2) ◽  
pp. 28-31
Author(s):  
Varunjeet Chaudhary ◽  
Sanad Singh Solanki ◽  
Varsha Yadav ◽  
Seema Lahoti
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Testing Machine ◽  
In Vitro Study ◽  
Composite Resins ◽  
Control Group ◽  
Bonding Agents ◽  
Significant Difference ◽  
Group 2

Objective: To evaluate the shear bond strength of stainless steel brackets bonded with fluoride-releasing composite resins, comparing effect of adhesion booster and conventional primer.Materials & Method: Sixty extracted premolars were subjected to bracket bonding with fluoride-releasing composite resin; which were bonded by randomly divided into two groups of bonding agents: Group 1- conventional primer as control group, Group 2- adhesion booster. After bonding, the samples were thermocycled (500 cycles) at 5ºC and 55ºC temperatures. After 48 hours they were subjected to shear bond strength testing in occluso-gingival direction, using an MTS 810 Universal Testing Machine with load speed of 0.5 mm/min.Result: Mean shear bond strength was significantly more in samples bonded with adhesion booster (14.792±3.805 Mpa) as compared to conventional primers (11.327±4.047 Mpa). There was statistically significant difference in shear bond strength between the groups (p=0.001).Conclusion: The use of the adhesion booster significantly increased the bond strength of bracket bonded with fluoride-releasing composite.

scholarly journals Influence of etching time and bonding strategies on the microshear bond strength of self- and light-cured pit-and-fissure sealants

2012 ◽  
Vol 23 (5) ◽  
pp. 477-483 ◽  
Author(s):  
Eduardo José Souza-Junior ◽  
Boniek Castillo Dutra Borges ◽  
Marcos Antônio Japiassú Resende Montes ◽  
Roberta Caroline Bruschi Alonso ◽  
Glaucia Maria Bovi Ambrosano ◽  
...  
Keyword(s):  
Bond Strength ◽  
Failure Modes ◽  
Testing Machine ◽  
Etching Time ◽  
Fissure Sealants ◽  
Pit And Fissure Sealants ◽  
Flowable Composite ◽  
Significant Difference ◽  
Microshear Bond Strength ◽  
The Impact

This study evaluated the impact of extended etching and bonding strategies on the microshear bond strength of three sealant materials. Two pit-and-fissure sealants [FluroShield, Dentsply (light-cured) and AlphaSeal, DFL (self-cured)] and one light-cured flowable composite resin (Permaflo, Ultradent) were evaluated according to different enamel etching times (15 s or 30 s) and bonding procedures (no adhesive application, application of primer/hydrophobic resin or hydrophobic resin only). Intact enamel blocks were obtained from bovine teeth and sealed via the tested protocols. After 24 h, the microshear bond strength test was performed in a universal testing machine at a crosshead speed of 0.5 mm/min. Failure modes were classified by stereomicroscopy. Data were submitted to a three-way ANOVA and to Tukey's test (α=0.05). There was no statistically significant difference (p>0.05) among the materials. Permaflo showed higher bond strength when etched for 30 s alone. Enamel overetching decreased the bond strength of the light-cured sealant. Primer/bond previous treatment improved bond performance for AlphaSeal. In conclusion, from the tested conditions, all sealant materials presented similar bond strength values in relation to bonding protocol and etching time. The flowable composite can be used as a pit-and-fissure sealant. The use of a three-step adhesive system was essential for the self-cured sealant application.

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