scholarly journals Shear bond strength evaluation of bonded molar tubes on fluorotic molars

2012 ◽  
Vol 83 (1) ◽  
pp. 152-157 ◽  
Author(s):  
Erika L. Silva-Benítez ◽  
Veronica Zavala-Alonso ◽  
Gabriel A. Martinez-Castanon ◽  
Juan P. Loyola-Rodriguez ◽  
Nuria Patiño-Marin ◽  
...  
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Dental Fluorosis ◽  
In Vitro Study ◽  
Mean Value ◽  
Fixed Appliance ◽  
Adhesive Remnant Index ◽  
The Mean ◽  
Electronic Microscope

Abstract Objective: To study the shear bond strength (SBS), sites of failure, and micromorphology of bonded molar tubes used on teeth affected by dental fluorosis. Materials and Methods: This in vitro study included 140 first molars classified according to Dean's index for dental fluorosis. Samples were divided into seven groups: (1) healthy teeth etched for 15 seconds, (2) teeth with moderate fluorosis (MOF) etched for 15 seconds, (3) teeth with MOF etched for 150 seconds, (4) teeth with MOF microabrasion etched for 15 seconds, (5) teeth with severe fluorosis (SEF) etched for 15 seconds, (6) teeth with SEF etched for 150 seconds, and (7) teeth with SEF microabrasion etched for 15 seconds. All samples were incubated and were then submitted to the SBS test and evaluated with the modified adhesive remnant index (ARI) and analyzed by using a scanning electronic microscope. Results: The SBS mean value for healthy enamel was 20 ± 10.2 MPa. For the group with MOF, the etched 150-second mean value was the highest (19 ± 7.6 MPa); for the group with SEF treated with microabrasion and etched for 15 seconds, the mean value was (13 ± 4.1 MPa). Significant differences (P ≤ .05) were found in the ARI between healthy and fluorosed groups. Conclusions: Fluorotic enamel affects the adhesion of bonded molar tubes. The use of overetching in cases of MOF and the combination of microabrasion and etching in SEF provides a suitable adhesion for fixed appliance therapy.

scholarly journals Shear bond strength evaluation of metallic brackets bonded to a CAD/CAM PMMA material compared to traditional prosthetic temporary materials: an in vitro study

2020 ◽  
Vol 25 (3) ◽  
pp. 31-38
Author(s):  
Gonzalo Andrés Garcés ◽  
Victor Hugo Rojas ◽  
Cristian Bravo ◽  
Camila S. Sampaio
Keyword(s):  
Bond Strength ◽  
Surface Treatment ◽  
Shear Bond Strength ◽  
In Vitro Study ◽  
Insufficient Information ◽  
Adhesive Remnant Index ◽  
Cad Cam ◽  
Negative Effect ◽  
Post Hoc

ABSTRACT Introduction: Orthodontic treatment for adults is currently increasing, and therefore the need to bond brackets to restorations and temporary crowns. The use of CAD/CAM PMMA provisional restorations for orthodontic purposes have not yet been described, and there is currently insufficient information regarding the strength of bracket adhesion. Objective: This study aimed at evaluating the effects of thermocycling (TC) and surface treatment on shear bond strength (SBS) of brackets to different provisional materials. Methods: Forty specimens were made from each material [PMMA (Telio Lab), bis-acryl (Telio CS C&B), and PMMA CAD/CAM (Telio CAD)], sandpapered, and divided according to surface treatment (pumiced or sandblasted) and TC (half of the samples = 1,000 cycles, 5°C/55°C water baths) (n = 10/group). Stainless-steel brackets were bonded to the specimens (using Transbond XT), and SBS testing was performed. Data were analyzed by three-way ANOVA and LSD post-hoc tests (α = 0.05). Failure types were classified with adhesive remnant index (ARI) scores. Results: SBS values ranged from 1.5 to 14.9 MPa. Sandblasted bis-acryl and sandblasted auto-curing PMMA groups presented similar values (p> 0.05), higher than the CAD/CAM material (p< 0.05), with or without TC. When thermocycled, pumiced bis-acryl showed higher SBS than pumiced acrylic (p= 0.005) and CAD/CAM materials (p= 0.000), with statistical difference (p= 0.009). TC showed negative effect (p< 0.05) for sandblasted bis-acryl and pumiced acrylic groups. ARI predominant score was mostly zero (0) for CAD/CAM, 1 and 2 for bis-acryl, and 1 for acrylic groups. Conclusion: In general, bis-acryl material showed the highest SBS values, followed by acrylic and CAD/CAM materials, which showed SBS values lower than an optimum strength for bonding brackets.

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.

scholarly journals Influence of adhesive and thermal cycling on the bond strength of ceramic brackets to dental ceramic

2017 ◽  
Vol 15 (2) ◽  
pp. 176
Author(s):  
Patricia de Fátima Fraga ◽  
Ana Paula Terossi de Godoi ◽  
Ana Rosa Costa ◽  
Lourenço Correr-Sobrinho ◽  
Mario Vedovello Filho ◽  
...  
Keyword(s):  
Bond Strength ◽  
Thermal Cycling ◽  
Hydrofluoric Acid ◽  
Shear Bond Strength ◽  
In Vitro Study ◽  
Single Bond ◽  
Adhesive Remnant Index ◽  
Ceramic Brackets ◽  
Post Hoc

Aim: This in vitro study investigated the effect of the application of an adhesive, silane and thermal cycling (TC) on the shear bond strength (SBS) of ceramic brackets to feldspathic ceramic. Methods: 16 cylinders of feldspathic ceramic were etched with hydrofluoric acid and divided into four groups (n=4): G1 - silane, without TC; G2 – silane, with TC; G3 - adhesive, without TC; G4 - adhesive, with TC. One layer of silane was applied on the surface of cylinders in G1 and G2 e one layer of photo-activated adhesive Single Bond Universal was used in G3 and G4. Ceramic brackets were bonded using Transbond XT. The SBS data were subjected to two-way ANOVA and Tukey’s post hoc test (α=0.05). The Adhesive Remnant Index (ARI) was evaluated at 40× magnification. Results: Silane was more effective than adhesive on the SBS of the brackets to ceramic (p<0.05). TC decreased significantly the SBS values compared with the groups without TC (p<0.05). The ARI results showed predominance of score 0. Conclusions: Groups with silane showed higher SBS than groups with adhesive. TC influence significantly on the bond strength. Regarding ARI, score 0 predominated in all groups.

scholarly journals Comparison of shear bond strength of orthodontic bracket bonding to teeth using light-curing units between halogen and LED: An in vitro study

2019 ◽  
Vol 45 (1) ◽  
pp. 17-22
Author(s):  
Md Kamal Abdullah ◽  
Tanzila Rafique ◽  
Ashis Kumar Biswas ◽  
Ranjit Ghosh ◽  
Md Abdul Gafur ◽  
...  
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
In Vitro Study ◽  
Vitro Study ◽  
Tooth Surface ◽  
Advantages And Disadvantages ◽  
Adhesive Remnant Index ◽  
Halogen Light ◽  
Light Curing

Background: Light-cured bonding systems have been widely accepted among orthodontists. Various light curing units are available now. Recently, the light emitting diode (LED) has been introduced alongside halogen light curing units. There is lack of information on the advantages and disadvantages of different light curing systems. The aim of this in vitro study was to compare the shear bond strength of orthodontic brackets and adhesive remnant index (ARI) of an adhesive cured with two different orthodontic light sources i.e. LED and halogen. Methods: Forty four (22 in each group) extracted human premolars without any defects were etched with 37% phosphoric acid and cleansed with water spray and air dried. The sealant (Ortho Solo) was applied on the tooth surface and the brackets were bonded using adhesive (Enlight). Adhesives were cured with Halogen (Litex) and LED (D-LUX) for 40 seconds. Then the specimens were debonded later using a universal testing machine, with crosshead speed of 0.2 mm/min until the brackets were detached. Adhesive remnant index (ARI) scores were assessed under stereomicroscope at ×10 magnification. Results: The shear bond strength in Halogen group was 19.73 ± 3.44 MPa and in the LED group 20.81±3.02 MPa which is little higher than halogen group. The proportion of being adhesive remaining index for ARI Score 1 in Halogen group was 5 (22.7%) and in LED group 7 (31.8%). While ARI Score 2 in the Halogen group was 13 (59.1%) compared to LED group 8 (36.4%). However, ARI Score 3 in Halogen group was 4 (18.2%) and in LED group 7 (31.8%). The overall model showing no significant difference. Conclusion: Within limitations, this in vitro study showed the shear bond strength of orthodontic adhesives cured with a LED was statistically equivalent to those cured with a halogen light curing unit. There were significant differences in the ARI scores of the light-curing units tested. LED light-curing units can be suggested for the polymerization of orthodontic bonding adhesives because it showed a balanced effect on ARI index. Bangladesh Med Res Counc Bull 2019; 45: 17-22

scholarly journals An Evaluation of Shear Bond Strength of Composite Resin to Enamel under Various Saliva Contaminated Conditions: An in vitro Study

2014 ◽  
Vol 4 (4) ◽  
pp. 101-104
Author(s):  
Smita Khalikar ◽  
Anita Kale ◽  
Abhay Kamra ◽  
Yogesh Kale
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Composite Resin ◽  
In Vitro Study ◽  
Enamel Surface ◽  
Normal Ideal ◽  
Ideal Condition ◽  
Intimate Contact ◽  
The Mean

ABSTRACT To produce good adhesion between composite resin and etched enamel surface, it is necessary to form a microscopi- cally intimate contact between them. Contaminants, like saliva, may interfere with such bonding. Salivary contamination may reduce the bond strength between composite resin and the enamel by 40 to 60%. Recent studies have suggested that only rewashing and drying of the etched and saliva contaminated enamel surface is sufficient in restoring bond strength to the normal ideal condition. Purpose To evaluate the effect of saliva contamination on the shear bond strength of composite resin to enamel by using different parameters. Materials and methods The highest mean shear bond strength of composite resin was obtained on the uncontami- nated enamel surface, and the lowest mean shear bond strength was obtained on the saliva contaminated moist enamel surface. Results The mean shear bond strength of composite resin to saliva contaminated, washed and air-dried enamel surface was less than the mean shear bond strength to the dry enamel surface. Conclusion This suggests that only rewashing of the saliva contaminated enamel surface is not enough in achieving bond strength equal to that of the uncontaminated enamel surface. How to cite this article Kale A, Kamra A, Kale Y, Khalikar S. An Evaluation of Shear Bond Strength of Composite Resin to Enamel under Various Saliva Contaminated Conditions: An in vitro Study. Int J Prosthodont Restor Dent 2014;4(4):101-104.

Chemomechanical Caries Removal in Primary Molars : Evaluation of Marginal Leakage and Shear Bond Strength in Bonded Restorations” - An in Vitro Study

2013 ◽  
Vol 37 (3) ◽  
pp. 269-274 ◽  
Author(s):  
PM Viral ◽  
C Nagarathna ◽  
B S Shakuntala
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
In Vitro Study ◽  
Vitro Study ◽  
Primary Molars ◽  
Strength Evaluation ◽  
Group I ◽  
Caries Removal ◽  
The Mean

Objectives : To evaluate and compare the efficiency, marginal leakage and shear bond strength of Carisolv and Papacarie in primary molars. Method: Freshly extracted 60 human carious primary molars were randomly divided into two experimental groups - Group I [ caries removal by Carisolv ] and Group II [ caries removal by Papacarie ]. The amount of time taken for complete caries removal was recorded using a stopwatch. After bonded restorations, both the experimental groups were further randomly subdivided into four experimental groups and subjected to marginal leakage and shear bond strength evaluation. Results : Papacarie [ 337.67 ± 18.13 ] was clinically more efficient than Carisolv [461.33 ± 27.76 ] in removing caries with respect to time in seconds. 66.7% of teeth treated with Carisolv did not show any marginal leakage as compared to 20% with Papacarie. The mean [ ± SD ] shear bond strength of Carisolv [ 9.67 ± 3.80 ] treated teeth was slightly more when compared to Papacarie [ 8.36 ± 4.51]. Conclusion :Papacarie was clinically more efficient in caries removal but showed significantly more marginal leakage than Carisolv.

scholarly journals Effect of adhesion boosters on indirect bracket bonding

2013 ◽  
Vol 84 (1) ◽  
pp. 171-176 ◽  
Author(s):  
Lylian Kazumi Kanashiro ◽  
Julissa Janet Robles-Ruíz ◽  
Ana Lidia Ciamponi ◽  
Igor Studart Medeiros ◽  
Gladys Cristina Dominguez ◽  
...  
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Pearson Correlation ◽  
Testing Machine ◽  
Bond Failure ◽  
Adhesive Remnant Index ◽  
Group 3 ◽  
The Mean ◽  
Failure Location

ABSTRACT Objective: To determine the influence of two adhesion boosters on shear bond strength and on the bond failure location of indirectly bonded brackets. Materials and Methods: Sixty bovine incisors were randomly divided into three groups (n  =  20), and their buccal faces were etched using 37% phosphoric acid. In group 1 (control), brackets were indirectly bonded using only Sondhi adhesive. In groups 2 and 3, the adhesion boosters Enhance Adhesion Booster and Assure Universal Bonding Resin, respectively, were applied before bonding with Sondhi. Maximum bond strength was measured with a universal testing machine, and the location of bond failure was evaluated using the Adhesive Remnant Index (ARI). One-way analysis of variance followed by the Tukey test (P &lt; .05) was used to compare the shear bond strength among groups, and the differences in ARI scores were evaluated using the Kruskal-Wallis test (P &lt; .05). The Pearson correlation coefficient was calculated to determine whether there was any correlation between bond strength and ARI scores. Results: The mean shear bond strength in group 3 was significantly higher (P &lt; .01) than in the other groups. Evaluation of the locations of bond failure revealed differences (P &lt; .05) among the three groups. There was a moderate correlation between bond strength and ARI scores within group 3 (r  =  0.5860, P &lt; .01). Conclusion: In vitro shear bond strength was acceptable in all groups. The use of the Assure adhesion booster significantly increased both the shear bond strength of indirectly bonded brackets and the amount of adhesive that remained on the enamel after bracket debonding.

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