Shear Bond Strength of Stainless Steel Brackets Bonded to Porcelain Surface Treated with 1.23 % Acidulated Phosphate Fluoride Gel Compared to Hydro Fluoric Acid with Silane Coupling Agent : In Vitro Comparative Study

2013 ◽  
Vol 25 (Speacial Issue 1) ◽  
pp. 167-173
Author(s):  
Tariq M. M. Al-Najjar ◽  
Fakhri A. Ali
Keyword(s):  
Stainless Steel ◽  
Bond Strength ◽  
Comparative Study ◽  
Coupling Agent ◽  
Shear Bond Strength ◽  
Silane Coupling Agent ◽  
Silane Coupling

Evaluating Various Preparation Protocols on the Shear Bond Strength of Repaired Composite

2017 ◽  
Vol 18 (3) ◽  
pp. 182-187
Author(s):  
Ayah A Al-Asmar ◽  
Khaled S Hatamleh ◽  
Muhanad Hatamleh ◽  
Mohammad Al-Rabab'ah
Keyword(s):  
Phosphoric Acid ◽  
Bond Strength ◽  
Coupling Agent ◽  
Shear Bond Strength ◽  
Silane Coupling Agent ◽  
Acid Etching ◽  
Air Abrasion ◽  
Group V ◽  
Silane Coupling ◽  
Phosphoric Acid Etching

ABSTRACT Introduction The aim of this study is to evaluate the effect of different combinations of various surface treatments on the shear bond strength (SBS) of repaired composite resin. Materials and methods A total of 122 composite samples were prepared from Filtek Z350 XT. Samples were light cured and stored for 6 weeks. Surface treatment of old composite was done in five groups: Group I: bur roughening + phosphoric acid etching, group II: bur roughening + hydrofluoric acid etching + silane coupling agent, group II: air abrasion + phosphoric acid etching, group IV: air abrasion + phosphoric acid etching + silane coupling agent, group V: air abrasion + hydrofluoric acid etching + silane coupling agent. Bonding agent was applied to all surface-treated old composites and light cured. The fresh composite resin was bonded to treated surfaces and cured and stored in water at 37°C for 6 weeks. Shear bond strength was measured by a universal testing machine. Results Shear bond strength values of all groups were not statistically significant except for group V, which showed statistically significant higher SBS than group III. Conclusion Techniques with readily available materials at the clinic can attain similar SBS to more elaborate technique involving potentially hazardous materials. How to cite this article Al-Asmar AA, Hatamleh KS, Hatamleh M, Al-Rabab'ah M. Evaluating Various Preparation Protocols on the Shear Bond Strength of Repaired Composite. J Contemp Dent Pract 2017;18(3):182-187.

scholarly journals Chemo-Mechanical Approach to Improve Repair Bond Strength of Denture Teeth

2020 ◽  
Vol 2020 ◽  
pp. 1-8
Author(s):  
Zahra A. AlZaher ◽  
Danah F. Almaskin ◽  
Masoumah S. Qaw ◽  
Tahani H. Abu Showmi ◽  
Reem Abualsaud ◽  
...  
Keyword(s):  
Bond Strength ◽  
Thermal Cycling ◽  
Surface Treatment ◽  
Coupling Agent ◽  
Shear Bond Strength ◽  
Silane Coupling Agent ◽  
Testing Machine ◽  
Control Group ◽  
Denture Base ◽  
Silane Coupling

Background. Detachment of acrylic teeth from denture base material is a common complication in dentistry which accounts for 26–30% of repair cases. This study aimed to evaluate the effect of alumina-blasting, silane coupling agent, and thermal cycling on the shear bond strength of repaired teeth to denture base. Materials and Methods. Specimens (140) of repaired teeth to denture bases were fabricated and divided into 14 groups: 7 groups before thermal cycling and 7 groups after thermal cycling (n = 10). The groups were divided according to surface treatment into no treatment (control), treatment of the base (B), the tooth (T), or both (BT). Each group was further subdivided according to the surface treatment method into alumina-blasting or alumina-blasting and silane coupling agent. After treatment, acrylic discs and teeth were fixed in a jig, and the repair procedure was done. Half the specimens were thermally cycled. Shear bond strength was measured using a universal testing machine. ANOVA and Tukey HSD tests were performed at α = 0.05. Results. Surface treatment significantly improved the bond strength compared to the control group P < 0.001 . Comparing surface treatments, alumina-blasting with silane coupling agent treatment resulted in significantly higher strength compared to alumina-blasting alone P < 0.001 . The BT group treated with alumina-blasting and silane coupling agent showed the highest significant shear bond strength (23.91 ± 0.96 MPa) P < 0.001 . Significant drop in strength value was observed in all groups after thermal cycling P < 0.004 except the BT group treated with alumina-blasting P = 0.096 . Conclusion. Surface treatment using alumina-blasting with silane coupling agent for denture base and tooth increased repair strength.

scholarly journals Comparative Study of Shear Bond Strength of Recycled Brackets using different Recycling Techniques – An in vitro study

2016 ◽  
Vol 6 (2) ◽  
pp. 33-36
Author(s):  
Rajeshwar Singh ◽  
Varunjeet Chaudhary ◽  
Seema Lahoti ◽  
Kapil Lahoti
Keyword(s):  
Bond Strength ◽  
Coupling Agent ◽  
Shear Bond Strength ◽  
Silane Coupling Agent ◽  
Testing Machine ◽  
Tooth Surface ◽  
Control Group ◽  
Bond Failure ◽  
Silane Coupling ◽  
Experimental Group

Introduction: The debonding of brackets is common in orthodontic practice. It may be due to bond failure or as a need for bracket repositioning. Typically practitioners shall discard dislodged brackets and replace it with a new bracket or reuse the bracketObjective: To compare and evaluate the shear bond strength of recycled orthodontic brackets using different methods.Materials & Method: A total of 50 extracted premolars and 50 metal brackets with a slot configuration of 0.022”x0.028” were used. All samples were divided into 5 groups with 10 samples each. Each group was further divided into 2 groups which were control group and experimental group. Experimental group was further subdivided into four recycle sub-groups. Tooth surface were prepared for bonding then brackets were bonded. The specimens were tested on Universal Testing Machine for shear bond strength. The force producing bond failure was recorded in Newtons (N) and converted into megapascals (Mpa).Result: Shear bond strength of control group was maximum among all recycled groups. Shear bond strength of recycled brackets bonded with silane coupling agent and recycled with flaming, electropolishing, sandblasting and ultrasonic cleaning was equivalent to the control group. Brackets recycled with flaming and sandblasting had less shear bond strength as compared to control group. Brackets recycled with flaming and electropolishing were having the least shear bond strength.Conclusion: Brackets recycled with flaming, ultra sonic scaling, electropolishing and treated with silane coupling agent was recorded with highest shear bond strength. Sandblasting of metal brackets to remove composite residue, had insignificant effect on the shear bond strength. Hence sandblasting should be considered as viable, time saving and convenient method of recycling. 

scholarly journals Shear Bond Strength of Acrylic Teeth to Acrylic Denture Base after Different Surface Conditioning Methods

2013 ◽  
Vol 14 (5) ◽  
pp. 892-897 ◽  
Author(s):  
Nidhi Mehta ◽  
Gajula Venu Madhav ◽  
Soundar Raj ◽  
Naveen Yadav ◽  
Ishitha Mudgal ◽  
...  
Keyword(s):  
Bond Strength ◽  
Coupling Agent ◽  
Shear Bond Strength ◽  
Silane Coupling Agent ◽  
Testing Machine ◽  
Acrylic Resin ◽  
Denture Base ◽  
Surface Conditioning ◽  
Biological Compatibility ◽  
Silane Coupling

ABSTRACT Background and Objectives Acrylic resin ruled the dental profession for 60 years, and this success is attributed to its aesthetics, handling properties, physical and biological compatibility, its stability in oral environment and its cost effectiveness. The objective of this study is to evaluate and compare the bond strength of acrylic resin teeth treated with various conditioning materials like monomer and silane coupling agent. Methdology A study was carried out in which 96 samples were grouped into 3 groups with a sample size of 32 each (16 premolars, 16 molars). They were conditioned with different conditioning materials i,e monomer and silane coupling agent. Monomer, Silane coupling agent are coated on the ridge lap area before thermocycling and cured according to the manufacturer recommendations. The samples are retained from the flask; trimmed and polished. The samples are then subjected to shear bond strength using the Insteron Universal Testing Machine. Results In the present study it was found that application of monomer increased the bond strength between acrylic teeth and denture base, when compared to the conventionally processed samples. However it was found that application of silane coupling agent further increased the shear bond strength between acrylic teeth and denture base. Interprations and conclusions Within the confines of this study it is found that there was a significant improvement in the bond strength between the acrylic teeth and denture base when silane coupling agent and monomer were used as surface conditioning material. The order of shear strength of samples is control > monomer > silane coupling agent. How to cite this article Madhav GV, Raj S, Yadav N, Mudgal I, Mehta N, Tatwadiya R. Shear Bond Strength of Acrylic Teeth to Acrylic Denture Base after Different Surface Conditioning Methods. J Contemp Dent Pract 2013;14(5):892-897.

scholarly journals A comparative study of shear bond strength of direct bonding system with and without a liquid primer: An in vitro study

2019 ◽  
Vol 11 (7) ◽  
pp. 515 ◽  
Author(s):  
KrantiKiran Reddy Ealla ◽  
AshokBabu Devatha ◽  
MNarasimha Lakshmi ◽  
NareshB Kumar ◽  
Srikanth Erukala ◽  
...  
Keyword(s):  
Bond Strength ◽  
Comparative Study ◽  
Shear Bond Strength ◽  
In Vitro Study ◽  
Vitro Study ◽  
Bonding System
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