scholarly journals Assessment of shear bond strength of brackets bonded by direct and indirect techniques: an in vitro study

2012 ◽  
Vol 17 (4) ◽  
pp. 1-7 ◽  
Author(s):  
Roberto Hideo Shimizu ◽  
Karlos Giovani Grando ◽  
Isabela Almeida Shimizu ◽  
Augusto Ricardo Andriguetto ◽  
Ana Cláudia Moreira Melo ◽  
...  
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
In Vitro Study ◽  
Adhesive System ◽  
Vitro Study ◽  
Group Iii ◽  
Indirect Bonding ◽  
Group I ◽  
Group Ii

OBJECTIVE: This in vitro study was designed to evaluate the shear bond strength (SBS) of orthodontic metal brackets bonded by direct and indirect techniques. METHODS: Thirty healthy human maxillary premolar teeth were used. The teeth were divided into three groups of 10 teeth each: Group I - indirect bonding with SondhiTM Rapid-Set system (3M/Unitek), Group II - indirect bonding with TransbondTM XT adhesive system (3M/Unitek) and Group III - direct bonding with TransbondTM XT adhesive system (3M/Unitek). After bonding and obtaining the specimens for the study, the specimens were subjected to SBS testing in a universal testing machine (Emic, model DL-500). The Kolmogorov-Smirnov test was applied to ascertain that the data had a normal distribution and the Bartlett test to check whether there was homogeneity of variance. One-factor analysis of variance was performed and, subsequently, Tukey's test for paired means. A 5% significance level was adopted. RESULTS: The results of Group I were 67.6 (N) and 5.9 (MPa); Group II, 68.9 (N) and 6.1 (MPa) and Group III (control), 92.5 (N) and 8.1 (MPa). CONCLUSION: It can therefore be concluded that the means for Group III were significantly higher compared with Groups I and II in both Newton (N) and Megapascal (MPa) values. The means attained by the indirect bonding technique used in Groups I and II, however, exhibited no statistically significant differences.

scholarly journals Indirect versus Direct Bonding—A Shear Bond Strength Comparison: An in vitro Study

2011 ◽  
Vol 12 (4) ◽  
pp. 232-238 ◽  
Author(s):  
Vinaya S Pai ◽  
S Nandini ◽  
M Swetha ◽  
N Sanjay
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
In Vitro Study ◽  
Adhesive System ◽  
Vitro Study ◽  
Tooth Surface ◽  
Indirect Bonding ◽  
Significant Difference ◽  
Bonding Technique

ABSTRACT Aim The process of bonding orthodontic appliances to the enamel surface of the teeth has come to the forefront as a major improvement in bonding techniques. The purpose of this study is to compare the shear bond strength of stainless steel orthodontic brackets bonded using conventional direct bonding and indirect bonding as described by Thomas. Materials and methods Forty sound human premolars were divided into two groups of 20 each. Group I samples were bonded directly on the tooth surface using concise two paste adhesive system after etching and drying. Group II samples were bonded indirectly on the tooth surface according to Thomas indirect bonding technique using concise two paste adhesive system. The stored specimen was tested for shear bond strength in an Instron universal testing machine at a crosshead speed of 0.5 mm/minute. Data obtained were subjected to statistical analysis. Results The results showed that there was no statistically significant difference in the shear bond strength between direct and indirect bonding techniques. Chi-square test showed that there were significant differences among the adhesive remnant index scores between direct and indirect bonding groups. Conclusion In vitro shear bond strength comparison between direct and indirect-bonded attachments showed no significant difference between the two groups. Bond strength obtained with Thomas indirect bonding technique was comparable with direct bonding technique. Clinical significance Thomas indirect bonding technique can be used for bonding of the posterior teeth, where the risk of moisture contamination is high during bonding. How to cite this article Swetha M, Pai VS, Sanjay N, Nandini S. Indirect versus Direct Bonding—A Shear Bond Strength Comparison: An in vitro Study. J Contemp Dent Pract 2011; 12(4):232-238.

scholarly journals Shear Bond Strength of Three Composite Resins to Fluorosed and Sound Dentine: In Vitro Study

2020 ◽  
Vol 2020 ◽  
pp. 1-7
Author(s):  
Sabra Jaâfoura ◽  
Amira Kikly ◽  
Saida Sahtout ◽  
Mounir Trabelsi ◽  
Dorra Kammoun
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
In Vitro Study ◽  
Adhesive System ◽  
Composite Resins ◽  
Vitro Study ◽  
Adhesion Forces ◽  
Average Shear ◽  
One Way Anova

Introduction. This in vitro study compared the shear strength of three composite resin systems to fluorosed and normal dentin. Methods. Silorane FiltekTM P90, FiltekTMZ250 XT in combination with the adhesive system AdperTM Single bond 2, and Amelogen® Plus in association with Peak Universal Bond® were tested. Fifteen normal and 15 fluorosed dentine disks were prepared per material. The shear bond strength test was performed using a universal machine. Results. One-way ANOVA revealed significant differences in bond strength between the tested composite resins. All tested materials had significantly different adhesion at the fluorosed and the nonfluorosed interface. FiltekTM Z250 XT and Silorane had lower adhesion values to fluorosed than to normal dentin. In contrast, Amelogen® Plus presented a better average resistance at the fluorosed interface. Conclusion. Amelogen® Plus presented a better average shear bond strength on the fluorosed dentine. FiltekTMZ250 XT showed the best adhesion forces and shear bond strength with sound dentine. Further studies are needed to better understand the sealing of these systems.

scholarly journals Effect of Saliva/Blood Contamination on Enamel Bond Strength

2021 ◽  
Vol 23 (4) ◽  
pp. 277-281
Author(s):  
Rodrigo Galo ◽  
Isabela Maluta ◽  
Marta Maria Martins Giamatei Contente ◽  
Carolina Paes Torres ◽  
Maria Cristina Borsatto
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Testing Machine ◽  
Adhesive System ◽  
Single Bond ◽  
Fissure Sealants ◽  
Pit And Fissure Sealants ◽  
Group I ◽  
Group Ii

AbstractIn the routine clinical situation, the contamination by blood and/or saliva in restorative procedures can be happen in non-cooperation of the patient in dental office. The aim of the study was to assess in vitro shear bond strength of a resin sealant associated with two types of adhesives contaminated with saliva and blood. Healthy human molars were used and the specimens and the crowns were sectioned in the bucco-lingual direction, thus obtaining two segments of similar proportions (mesial and distal), totaling 60 surfaces, and the surfaces were randomly divided into 4 groups (n = 15). Group I (control) received no type of contamination and the sealant was applied. In group II, the surfaces were contaminated with 10 μl of saliva/blood and the sealant was applied. In group III, the surfaces were contaminated with 10 μl of saliva/blood and the Single Bond total-etch adhesive system was applied followed by application of sealant. In group IV, the surfaces were contaminated with 10 μl of saliva/blood and the Prime & Bond NT total-etch adhesive system was applied followed by the application of sealant. Samples were tested in the universal testing machine and the analysis of shear bond strength was performed. A difference between Group I (12.61MPa) and the other groups was found; Group II (2. 28MPa) was different than Groups III (7.07MPa) and IV (7.79MPa), but Groups III and IV were similar. The application of an adhesive system when there is contamination with saliva/blood is required prior to application of pit and fissure sealants. Keywords: Pit and Fissure Sealants. Biological Contamination. Shear Strength. ResumoNa situação clínica de rotina, a contaminação por sangue e/ou saliva em procedimentos restauradores pode ocorrer em pacientes que não colaboram no consultório odontológico. O objetivo do estudo foi avaliar a resistência ao cisalhamento in vitro de um selante de resina associado a dois tipos de adesivos contaminados com saliva e sangue. Foram utilizados molares humanos saudáveis e os espécimes e as coroas foram seccionados na direção bucal-lingual, obtendo assim dois segmentos de proporções semelhantes (mesial e distal), totalizando 60 superfícies, e as superfícies foram divididas aleatoriamente em 4 grupos (n = 15). O Grupo I (controle) não recebeu nenhum tipo de contaminação e o selante foi aplicado. No grupo II, as superfícies foram contaminadas com 10 μl de saliva / sangue e o selante foi aplicado. No grupo III, as superfícies foram contaminadas com 10 μl de saliva / sangue e o sistema adesivo Single-Bond foi aplicado seguindo a aplicação de selante. No grupo IV, as superfícies foram contaminadas com 10 μl de saliva / sangue e o sistema adesivo de ataque total Prime & Bond NT foi aplicado seguido da aplicação de vedante. As amostras foram testadas na máquina de ensaio universal e a análise da resistência à ligação ao cisalhamento foi realizada. Uma diferença entre o Grupo I (12,61MPa) e os outros grupos foi encontrada; O Grupo II (2,28 MPa) foi diferente dos Grupos III (7,07MPa) e IV (7,79 MPa), mas os Grupos III e IV foram semelhantes. A aplicação de um sistema adesivo quando existe contaminação com saliva / sangue é necessária antes da aplicação de selantes de fissura e fissura.. Palavras-chave: Selantes de Fossas e Fissuras. Contaminação Biológica. Resistência ao Cisalhamento.

Effect of Bonding Agent on Retention of Different Sealants: An in Vitro Study

2021 ◽  
Vol 45 (3) ◽  
pp. 177-185
Author(s):  
Moaz H Attar ◽  
Medhat A Abdallah ◽  
Hussein A Alharthy ◽  
Omar A El Meligy
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
In Vitro Study ◽  
Bonding Agent ◽  
Micro Ct ◽  
Group Iii ◽  
Group I ◽  
Significant Difference ◽  
Sealant Retention

Objectives: To investigate the effect of Co-curing versus Staged-curing and No-bonding on retention of different resin-based sealants (RBS). Study design: For shear bond strength (SBS) and microleakage tests, 90 extracted premolars were divided equally into 3 groups (I, II, III). Each group was further subdivided equally into 3 subgroups (a, b, c). No-bonding subgroups did not receive a bonding agent, Staged-curing subgroups received a bonding agent that was cured before sealant application, while Co-curing subgroups received a bonding agent that was cured after sealant application. Seal-it was applied for group I, Helioseal-F for group II and Clinpro for group III. SBS buttons were tested using Instron machine, while microleakage specimens were examined using micro-CT. Results: Clinpro showed the highest SBS values in Staged-curing and No-bonding groups (8.72±2.39, 12.51±3.16) respectively. Staged-curing was significantly greater in SBS values than those for other groups (P<0.05). There was a significant difference in microleakage values of Staged-curing among different RBS (P = 0.003), while there was no significant difference in values of No-bonding and Co-curing among different RBS (P = 0.541, P = 0.521). Conclusions: The use of a bonding agent as Staged-curing was more effective in improving sealant retention than No-bonding and Co-curing.

scholarly journals Influence of different adhesive systems on bond strength of carbon fiber posts used to restore endodontically treated teeth

2013 ◽  
Vol 1 (4) ◽  
pp. 335
Author(s):  
Lorena Dos Santos Silva ◽  
Kátia Rodrigues Reis ◽  
Glaucia Maria Bovi Ambrosano ◽  
Fabíola Mendonça da Silva Chuí ◽  
Neylla Teixeira Sena ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Bond Strength ◽  
Shear Bond Strength ◽  
Adhesive System ◽  
Adhesive Systems ◽  
Group Iii ◽  
Fiber Posts ◽  
Group I ◽  
Group Ii ◽  
Push Out

The aim of this study was to evaluate the influence of three adhesive systems on resinous bonding of carbon fiber posts on roots of endodontically treated bovine incisors. Thirty bovine lower incisors with similar dimensions were selected for this study. The roots were endodontically treated and subsequently prepared for post cementation. The posts were treated with adhesive systems Scotchbond MultiPurpose Plus – 3M chemical cure (Group I), light cure (Group II) and dual cure (Group III). Carbon fiber posts were adjusted to 8mm and cemented in the canal with resinous dual cement RelyX ARC – 3M. Those were taken to Universal Essay Machine for the push-out shear bond strength test. Analysis of the results were made with 2-Way ANOVA and post-hoc with Tukey’s test (p<0.05). The groups were statistically different. The chemical cure adhesive system (Group I) showed highest values of resistance to push-out, both at all thirds as well as in total average (24.77 MPa), followed by light cure adhesive (Group II, 22.26 MPa), and dual cure (Group III, 18.38 MPa). Scothbond Multi-Purpose Plus – 3M adhesive system presented highest shear bond strength on resinous cementation of carbon posts to root dentin, and therefore is the first choice among the materials presented in this study.

scholarly journals Effect of Saliva Contamination on Shear Bond Strength of Self-etch Adhesive System to Dentin: An In Vitro Study

2021 ◽  
Vol 14 (4) ◽  
pp. 443-446
Author(s):  
Ashwini B Prasad ◽  
Deepak Raisingani ◽  
Renuka P Chinchalkar ◽  
Pooja Sen ◽  
Rahul R Chaudhari ◽  
...  
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
In Vitro Study ◽  
Adhesive System ◽  
Vitro Study ◽  
Saliva Contamination ◽  
Self Etch

scholarly journals EVALUATION OF SHEAR BOND STRENGTH OF COMPOSITE TO DENTIN REWETTED WITH A DESENSITIZER- AN IN-VITRO STUDY

2019 ◽  
Vol 8 (3) ◽  
Author(s):  
Dr. Sundaresan Balagopal ◽  
Dr. Bahavathi Ananthan Hemasathya ◽  
Dr. Ramasamy Saravanan Saravanan Gayathri ◽  
Dr. M. Anisha Anisha Sebatni ◽  
Dr. Vasudevan Navabharathy
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Testing Machine ◽  
In Vitro Study ◽  
Bonding Agents ◽  
Group I ◽  
Group A ◽  
Group Ii ◽  
Group B

Aim: The aim of the study was to evaluate the shear bond strength of composite to dentin with 2 different dentin bonding agents after dry dentin is rewetted with a desensitizer. Materials and Methods: Sixty human mandibular molars were taken and the occlusal surface was ground to expose flat dentinal surface.  The samples were divided into two major groups Group I and Group II based on the bonding agent used. In Group I Gluma Bond5 was used and in Group II Adper Single Bond 2 was used.  Each major group is subdivided into three subgroups a, b and c with ten samples each.  Sub Group ‘a’ is moist dentin group. Sub Group ‘b’ is dry dentin group, Sub Group ‘c’ is rewetted dentin group. The desensitizer used is GLUMA Desensitizer. All these samples were thermocycled and the shear bond test was performed using Instron Universal Testing Machine. Results: Dry dentin rewetted with GLUMA Desensitizer followed by GLUMA Bond5 showed highest shear bond strength than that of other subgroups. The data was analysed using ANOVA and Tukeys honestly significant test. Conclusion: Desensitizer used as a rewetting agent increases the shear bond strength of composite on dry dentin. Keywords: Glutaraldehyde, rewetting.

scholarly journals Reattachment of Fractured Anterior Teeth—Determining Fracture Strength using Different Techniques: An in vitro Study

2012 ◽  
Vol 13 (1) ◽  
pp. 61-65 ◽  
Author(s):  
Ena Mathur ◽  
Srilatha LNU ◽  
Sonal Joshi ◽  
Neha Chhasatia ◽  
PJ Rani
Keyword(s):  
Bond Strength ◽  
Fracture Strength ◽  
Shear Bond Strength ◽  
In Vitro Study ◽  
Group Iv ◽  
Group Iii ◽  
Anterior Teeth ◽  
Strength Recovery ◽  
Group I

ABSTRACT Aim The aim of this in vitro study was to evaluate and compare the shear bond strength of teeth reattached with sixth generation dentin bonding agent: Xeno III and microhybrid resin composite: Esthet-X, using three different techniques: (1) Simple reattachment, (2) overcontour and (3) internal dentinal groove. Methodology A total of 70 human maxillary central incisors were selected and divided into four groups as follows. Group I: Control group comprised of 10 samples. Group II: Simple reattachment, group III: Overcontour and group IV: Internal dentinal groove. Groups II, III and IV comprised of 20 samples each. The teeth in three study groups were sectioned using a diamond disk and the fragment was reattached with Esthet-X and Xeno III using three different techniques. Specimens were stored in tap water for 24 hours and shear bond strength was determined using universal testing machine using a knifeedge chisel (0.5 mm in cross-section) at a crosshead speed of 1 mm/minute. Results The results of this study showed following mean value of fracture strength in Kgf: Group I: Control—27.71; group II: Simple reattachment—9.78; group III: Overcontour—24.41; group IV: Internal dentinal groove—23.83. Conclusion The overcontour technique had the highest strength recovery while the simple reattachment had the lowest. Clinical significance The overcontour technique provided strength recovery almost similar to intact teeth emphasizing that tooth preparation influenced fracture resistance. How to cite this article Srilatha, Joshi S, Chhasatia N, Rani PJ, Mathur E. Reattachment of Fractured Anterior Teeth— Determining Fracture Strength using Different Techniques: An in vitro Study. J Contemp Dent Pract 2012; 13(1):61-65.

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