scholarly journals Effect of Self-etchant pH on Shear Bond Strength of Orthodontic Brackets: An in vitro Study

2012 ◽  
Vol 3 (1) ◽  
pp. 41-49
Author(s):  
BM Shivalinga ◽  
H Jyothikiran ◽  
Amit Goyal
Keyword(s):  
Bond Strength ◽  
Failure Mode ◽  
Shear Bond Strength ◽  
Testing Machine ◽  
In Vitro Study ◽  
Orthodontic Brackets ◽  
Control Group ◽  
System Control ◽  
Bond System

ABSTRACT Aims To determine the effect of self-etchant pH on shear bond strength of orthodontic brackets; to compare the shear bond strengths of brackets bonded with three SEPs and brackets bonded with conventional etch, rinse, bond method and to find the brackets/adhesive failure mode. Materials and methods One hundred and twenty premolar teeth were cleaned, mounted, and randomly divided into four groups of 30 samples each- Transbond XT conventional etch and bond system (control), Adper SE Plus SEP (3M ESPE) with a pH of 0.9 to 1.0, Transbond Plus SEP (3M Unitek) with a pH of about 1.0 and Clearfil SE Bond SEP (Kuraray America) with a pH of around 2.0. All teeth were bonded with Transbond XT paste (3M Unitek). The teeth were debonded within half an hour after initial bonding by using a universal testing machine. The residual adhesive on each tooth was evaluated. ANOVA was used to compare the shear bond strength (SBS) of the three groups, and the Chi-square test was used to compare the adhesive remnant index (ARI) scores for the three groups. Results ANOVA indicated significant differences between the groups. Clearfil attained the SBS (6.5 ± 0.6689 MPa) closest to the control group, whereas Adper inspite of being the most aggressive recorded the lowest SBS (5.7 ± 0.5695 MPa). Transbond self-etching primer achieved a mean SBS of 6.1 ± 0.6211 MPa. However, all the three SEPs recorded SBS which was significantly less than that of Transbond conventional etch, rinse and bond system (11.8027 ± 0.8059 MPa). The comparisons of the ARI scores between the three groups indicated that bracket failure mode was significantly different between the three groups (p < 0.05). Conclusion These findings show that factors other than pH, such as the ability of the bonding adhesive to form a chemical bond to enamel and the strength of the bonding adhesive itself, significantly influence the SBS of orthodontic brackets. How to cite this article Goyal A, Jyothikiran H, Shivalinga BM. Effect of Self-etchant pH on Shear Bond Strength of Orthodontic Brackets: An in vitro Study. World J Dent 2012;3(1):41-49.

scholarly journals Shear Bond Strength of Three Orthodontic Bonding Systems on Enamel and Restorative Materials

2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
Andreas Hellak ◽  
Jennifer Ebeling ◽  
Michael Schauseil ◽  
Steffen Stein ◽  
Matthias Roggendorf ◽  
...  
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Testing Machine ◽  
In Vitro Study ◽  
Control Group ◽  
Metal Composite ◽  
Universal Adhesive ◽  
Restorative Materials ◽  
Bonding Systems

Objective.The aim of this in vitro study was to determine the shear bond strength (SBS) and adhesive remnant index (ARI) score of two self-etching no-mix adhesives (iBond™and Scotchbond™) on different prosthetic surfaces and enamel, in comparison with the commonly used total etch system Transbond XT™.Materials and Methods. A total of 270 surfaces (1 enamel and 8 restorative surfaces,n=30) were randomly divided into three adhesive groups. In group 1 (control) brackets were bonded with Transbond XT primer. In the experimental groups iBond adhesive (group 2) and Scotchbond Universal adhesive (group 3) were used. The SBS was measured using a Zwicki 1120™testing machine. The ARI and SBS were compared statistically using the Kruskal–Wallis test (P≤0.05).Results. Significant differences in SBS and ARI were found between the control group and experimental groups.Conclusions. Transbond XT showed the highest SBS on human enamel. Scotchbond Universal on average provides the best bonding on all other types of surface (metal, composite, and porcelain), with no need for additional primers. It might therefore be helpful for simplifying bonding in orthodontic procedures on restorative materials in patients. If metal brackets have to be bonded to a metal surface, the use of a dual-curing resin is recommended.

Comparative evaluation of shear bond strength of composite to dentin in presence of different dental liners: An in-vitro study

2021 ◽  
Author(s):  
Ladan Ranjbar Omrani ◽  
Saba Tohidkhah ◽  
Elham Ahmadi ◽  
Mahdi Abbasi ◽  
Reza Morvaridi Farimani
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Resin Composite ◽  
Testing Machine ◽  
Glass Ionomer Cement ◽  
In Vitro Study ◽  
Control Group ◽  
The One ◽  
Post Hoc

Abstract Background: The aim of the current study was to evaluate and compare the influence of Dycal, Lime-lite, Theracal LC, Biodentine, Resin-modified glass ionomer cement (RMGIC), and Activa Bioactive as the pulp capping material on the shear bond strength of resin composite to dentin.Methods: A total of 70 extracted caries-free molars were randomly assigned to seven groups. Six test groups were covered with various protective liners: Dycal (GD), Theracal LC (GT), lime-lite (GL), Activa Bioactive (GA), Biodentine (GB), RMGIC (GR). The control group (GC)received no liner pretreatment. Each sample was bonded to resin composite using the total-etch tetric N bond adhesive. The samples were then tested for shear bond strength using the universal testing machine at a cross-head speed of 1 mm/min until bond failure occurred. The data were analyzed using the one-way ANOVA test followed by the Tamhane post-hoc test for pairwise comparisons of the groupsResults: Independent of the type of the applied liner, all groups exhibited inferior SBS to dentine compared to the control group. GT and GR showed significantly higher shear bond strength than GB and GD, which showed the lowest shear bond strength. GL and GA also had significantly lower SBS results than GT. The mode of fracture was predominantly cohesive in GD, GB, and GT and adhesive in GA.Conclusion: This present study concludes that the bond strength of resin-composite to dentine can be affected differently using various types of liners.

scholarly journals Effect of Contamination with Hemostatic Agent on Shear Bond Strength of Composite to Dentin Using G-Premio and Single Bond Universal Adhesives

2021 ◽  
Author(s):  
Zahra Khamverdi ◽  
Naemeh Karimian ◽  
Maryam Farhadian ◽  
Hamed Gheitouli
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Testing Machine ◽  
In Vitro Study ◽  
Hemostatic Agent ◽  
Control Group ◽  
Single Bond ◽  
Failure Data ◽  
Universal Adhesives

Objectives: Bond strength of composite restorations plays an important role in their success. This in vitro study evaluated the effect of a hemostatic agent on shear bond strength of universal adhesives. Materials and Methods: Thirty-six extracted human molars were used in this study. Buccal and lingual surfaces were reduced to obtain flat dentin surfaces and were ground with a silicone paper. The samples were randomly divided into three groups (n=12) based on the application of hemostatic agent: group 1: no contamination (control), group 2: aluminum chloride application, and group 3: ferric sulfate application. Each group was then divided into two subgroups (n=6) for using G-Premio and Single Bond Universal. Resin cylinders (Filtek Z550) were bonded to dentin surfaces according to the manufacturer’s instructions. After 1000 thermal cycles, shear load was applied to the specimens using a universal testing machine at a crosshead speed of 1 mm/min until failure. Data were statistically analyzed using two-way ANOVA and Tukey’s post-hoc test (α=0.05). Results: There were statistically significant differences in shear bond strength of the three main groups for both G-Premio and Single Bond Universal (P<0.05). When the adhesive systems were compared with each other, G-Premio showed higher shear bond strength than Single Bond Universal (P<0.05). Conclusion: Contamination with hemostatic agents had an adverse effect on the shear bond strength of universal adhesives. Moreover, G-Premio yielded a higher bond strength than Single Bond Universal.

scholarly journals Bond Strength of Orthodontic Brackets to Temporary Crowns: In Vitro Effects of Surface Treatment

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Suliman Y Shahin ◽  
Tahani H. Abu Showmi ◽  
Sadeem H. Alzaghran ◽  
Hoda Albaqawi ◽  
Latifah Alrashoudi ◽  
...  
Keyword(s):  
Bond Strength ◽  
Surface Treatment ◽  
Shear Bond Strength ◽  
Orthodontic Treatment ◽  
Testing Machine ◽  
Orthodontic Brackets ◽  
Control Group ◽  
Number Of Patients ◽  
Conventional Manner

Background. The number of patients seeking orthodontic treatment has been consistently increasing. During orthodontic treatment, it is recommended to place the provisional restoration and to delay the final restoration until completion of orthodontic treatment. Recurrent bracket debonding necessitates orthodontists to prepare the bonding area with special measures. Objective. This study aimed to evaluate the effect of different grit sizes of diamond burs and sandblasting surface treatment on the shear bond strength of orthodontic brackets to provisional crowns. Materials and Methods. A total of 75 discs were fabricated from a bisacrylic composite and divided into 5 groups (n = 15) according to surface treatment by black, blue, and green diamond burs and sandblasting in addition to a control group. Metal orthodontic brackets were bonded to discs in a standardized conventional manner. All specimens were subjected to thermocycling with 5000 cycles of alternating 5°C and 55°C waterbaths. The shear bond strength test was performed using a universal testing machine. A scanning electron microscope (SEM) was used to analyze the surface treatment effect and features of debonded surfaces. The amount of composite resin left on the specimen surfaces was analyzed and classified with the adhesive remnant index. One-way ANOVA was performed at α = 0.05. Results. The shear bond strength of specimens treated with sandblasting was significantly higher than that of the control group under thermal aging conditions ( p = 0.022 ), as well as blue burs ( p = 0.001 ), while no significant differences were found between different grit diamond burs and the controls ( p > 0.05 ). Conclusion. Under thermocycling conditions, sandblasting of provisional crowns increases the bond strength of orthodontic brackets.

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 Effect of fluoride solutions on the shear bond strength of orthodontic brackets

2012 ◽  
Vol 23 (6) ◽  
pp. 698-702 ◽  
Author(s):  
Gabriela da Rocha Leódido ◽  
Hianna Oliveira Fernandes ◽  
Mateus Rodrigues Tonetto ◽  
Cristina Dupim Presoto ◽  
Matheus Coêlho Bandéca ◽  
...  
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Testing Machine ◽  
In Vitro Study ◽  
Orthodontic Brackets ◽  
Adhesive Remnant Index ◽  
Significant Difference ◽  
Tooth Surfaces ◽  
Pre Treatment

The aim of this in vitro study was to evaluate the shear bond strength of brackets after pre-treatment with different fluoride solutions. This study used 48 freshly extracted sound bovine incisors that were randomly assigned to 4 experimental groups (n=12). CG: (control) without treatment; NF: 4 min application of neutral fluoride; APF: application of 1.23% acidulated phosphate fluoride (APF) for 4 min; and SFV: application of 5% sodium fluoride varnish for 6 h. For each group, after surface treatment, prophylaxis of enamel and bracket bonding with Transbond XT composite resin (3M) were performed following the manufacturer's specifications. The shear bond strength was performed with a universal testing machine 24 h after fixing the brackets. The tooth surfaces were analyzed to verify the adhesive remnant index (ARI). Data were analyzed statistically by ANOVA and Tukey's test (α=0.05). There was statistically significant difference among the groups (p<0.0001). CG and NF groups presented significantly higher bond strength than APF and SFV. There was no significant difference between CG and NF or between APF and SFV (p>0.05). The analysis of ARI scores revealed that most failures occurred at the enamel-resin interface. It may be concluded that the pre-treatment of enamel with 1.23% APF and 5% SFV prior to fixing orthodontic brackets reduces shear bond strength values.

Comparative Evaluation of Shear Bond Strength of Composite to Dentin in Presence of Calcium Releasing Liners: An In-Vitro Study

2021 ◽  
Author(s):  
Saba Tohidkhah ◽  
Elham Ahmadi ◽  
Mahdi Abbasi ◽  
Reza Morvaridi Farimani ◽  
Ladan Ranjbar Omrani
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Resin Composite ◽  
Testing Machine ◽  
Glass Ionomer Cement ◽  
In Vitro Study ◽  
Control Group ◽  
The One ◽  
Post Hoc

Abstract Background: The aim of current study was to evaluate and compare the influence of Dycal, Lime-lite, Theracal LC, Biodentine, Resin-modified glass ionomer cement (RMGIC), and Activa Bioactive as the pulp capping material on the shear bond strength of resin composite to dentin.Methods: A total of 70 extracted caries-free molars were randomly assigned to seven groups. Six test groups were covered with various protective liners: Dycal (GD), Theracal LC (GT), lime-lite (GL), Activa Bioactive (GA), Biodentine (GB), RMGIC (GR). The control group (GC)received no liner pretreatment. Each sample was bonded to resin composite using the total-etch tetric N bond adhesive. The samples were then tested for shear bond strength using the universal testing machine at a cross-head speed of 1 mm/min until bond failure occurred. The data were analyzed using the one-way ANOVA test followed by the Tamhane post-hoc test for pairwise comparisons of the groupsResults: Independent of the type of the applied liner, all groups exhibited inferior SBS to dentine compared to the control group. GT and GR showed significantly higher shear bond strength than GB and GD, which showed the lowest shear bond strength. GL and GA also had significantly lower SBS results than GT. The mode of fracture was predominantly cohesive in GD, GB, and GT and adhesive in GA.Conclusion: This present study concludes that the bond strength of resin-composite to dentine can be affected differently using various types of liners.

scholarly journals Micro-shear bond strength of bioactive cement to translucent zirconia after thermocycyling: a comparative in-vitro study

2020 ◽  
Vol 23 (1) ◽  
Author(s):  
Menna Ahmed ElGendy ◽  
Ihab Mosleh ◽  
Hanaa Zaghloul
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Testing Machine ◽  
In Vitro Study ◽  
Resin Cement ◽  
Zirconia Ceramic ◽  
Control Group ◽  
Significant Difference ◽  
Before And After

Objective: the purpose of the study was to evaluate the micro-shear bond strength of different cements to translucent zirconia before and after thermocycling aging. Material and methods: Twelve translucent zirconia ceramic discs were used in the study. Specimens were sandblasted using 50 ‎μm aluminum oxide (Al2O3) particles. The specimens were divided into three groups (n = 4) according to the cement type: Panavia resin cement (control group), resin modified glass ionomer (RMGI), and Activa bioactive cement. Each group was further sub-divided into two equal subgroups (n = 2) according to whether the specimens were subjected to thermocycling or not. Thermocycling was performed in distilled water at 5000 cycles between 5 oC - 55 oC. The micro-shear bond strength test (μSBS) was measured using universal testing machine. Kruskal-Wallis test was used to compare between the three cements. Dunn’s test was used for pair-wise comparisons when Kruskal-Wallis test is significant. Mann-Whitney U test was used to compare between micro-shear bond strength before and after thermocycling P ≤ 0.05. Results: In non-aged subgroups, there was no significant difference between Panavia and Activa; both showed significantly the highest mean μSBS values (22.9 MPa, 31.3 MPa respectively). While, RMGI showed the lowest μSBS values (4.7 MPa).  In thermocycled subgroups, Panavia showed significantly the highest mean μSBS values (32.2 MPa). There was no significant difference between RMGI and Activa; both showed the lowest significant mean μSBS values (3.2 MPa and 8.7 MPa respectively). Conclusions: RMGI and Activa couldn’t be considered long-term reliable materials for cementing zirconia. However, Panavia provided the most durable bond to zirconia.KEYWORDSBioactive cement; Micro-shear bond strength; Resin cement; Translucent zirconia.

scholarly journals Comparison of Shear Bond Strength of Hydrophilic Bonding Materials: An in vitro Study

2012 ◽  
Vol 13 (5) ◽  
pp. 637-643 ◽  
Author(s):  
C Nirupama ◽  
Sarasa Kavitha ◽  
Josy Jacob ◽  
K Balaji ◽  
B Srinivasan ◽  
...  
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Artificial Saliva ◽  
Testing Machine ◽  
In Vitro Study ◽  
Tooth Surface ◽  
Distinct Advantage ◽  
Control Group ◽  
Factorial Anova

ABSTRACT Aim The aim of this study was to evaluate and compare the shear bond strength of hydrophilic materials like Transbond MIP with Assure-fluoride releasing light cure sealant paste system (Reliance orthodontic product), Enhance Lc-adhesion booster (Reliance Orthodontics) Prime and Bond NT–one step adhesive with nanotechnology (Dentsply Product India) with Transbond XT as the control group. Materials and methods The study was conducted on 180 extracted human premolar teeth which were divided into five main groups. Each group contained 36 teeth, which were further subdivided into three subgroups containing 12 teeth. The teeth were bonded in three different surface environments namely dry, contaminated with artificial saliva and reprimed after contamination with artificial salvia. The brackets were bonded and cured. The shear bond strength was tested using Instron universal testing machine (4501). Results The results were subjected to statistical analysis like 3 factorial ANOVA and compared to post-hoc using the Student Newman levels test. The residual resin on the tooth surface after debonding was evaluated with adhesive remnant index. Clinical significance The results revealed that in situations in which moisture contamination is critical there is distinct advantage in using hydrophilic primers. How to cite this article Nirupama C, Kavitha S, Jacob J, Balaji K, Srinivasan B, Murugesan R, Krishnaswamy NR. Comparison of Shear Bond Strength of Hydrophilic Bonding Materials: An in vitro Study. J Contemp Dent Pract 2012;13(5): 637-643.

scholarly journals Effect of Silver Diamine Fluoride Pretreatment on Shear Bond Strength of Resin Modified Glass Ionomer Cement to Primary Dentin

2021 ◽  
Vol 9 (D) ◽  
pp. 243-247
Author(s):  
Maiada Mohammad Ahmad Sa’ada ◽  
Nagwa Mohammed Ali Khattab ◽  
Maha Ishaq Amer
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Testing Machine ◽  
Glass Ionomer Cement ◽  
In Vitro Study ◽  
Study Groups ◽  
Control Group ◽  
Glass Ionomer ◽  
Silver Diamine Fluoride

AIM: The aim of the study was to evaluate effect of silver diamine fluoride (SDF) on the shear bond strength (SBS) of glass ionomer restoration to primary dentine. MATERIALS AND METHODS: Twenty extracted primary molars with no restorations or developmental anomalies were only chosen for the study. Twenty dentine slices with 2 mm thickness were prepared and then randomly allocated into two groups (n = 10 per group). For Group 1 (experimental): Dentine surfaces were treated with 38% *SDF solution (Elevate oral care, USA) for 3 min using micro-brush, followed by a 30 s rinse with water and Group 2 (Control): Dentine surfaces were treated with distilled water for 3 min then rinsed for 30 s. The cavity conditioner was applied to flat dentin of both groups for 10 s then washed and dried gently with compressed air. All the specimens were restored with *RMGIC (Riva Light Cure, SDI, Australia). SBS was determined using a Universal Testing machine and Failure mode was evaluated using stereomicroscope. Data were collected and statistically analyzed. Independent t test was used to assess differences in SBS between study groups and mode of failure was analyzed using Fisher’s exact test. Level of significance was set at p ≤ 0.05. IBM SPSS statistical software (version 26) was used to analyze the data. RESULTS: The experimental group had significantly higher mean of shear bond (11.92 ± 3.35) strength than the control group (6.99 ± 2.98) (p = 0.003). CONCLUSIONS: Primary dentin pre-treatment with 38% SDF increases the shear bond strength between RMGIC and primary dentin according to the results of this in vitro study.

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