scholarly journals Influence of Pre-Etched Area and Functional Monomers on the Enamel Bond Strength of Orthodontic Adhesive Pastes

2021 ◽  
Vol 11 (17) ◽  
pp. 8251
Author(s):  
Yuriko Tezuka ◽  
Yasuhiro Namura ◽  
Akihisa Utsu ◽  
Kiyotaka Wake ◽  
Yasuki Uchida ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Bond Strength ◽  
Shear Bond Strength ◽  
Functional Monomer ◽  
Gap Formation ◽  
Sem Images ◽  
Functional Monomers ◽  
Adhesive Remnant Index ◽  
Bovine Enamel ◽  
Scanning Electron

This study was performed to investigate the influence of pre-etching area and functional monomers in orthodontic adhesive pastes on enamel bond strength. Bovine enamel was partially pre-etched with phosphoric acid for 30 s over areas with a diameter of 1.0, 2.0 or 3.0 mm, and metal brackets were then bonded with or without functional monomers in the orthodontic adhesive paste. For the baseline groups, the whole adherent area was pre-etched. The shear bond strength (SBS) and adhesive remnant index (ARI) were determined. The adhesive paste/enamel interfaces were observed by scanning electron microscopy (SEM). Although the adhesive paste with functional monomers showed higher SBS than the functional monomer-free adhesive paste in all groups, there were no significant differences in SBS between them regardless of the pre-etched area. The SBS increased with increasing pre-etched area in both orthodontic adhesive pastes. In SEM images of adhesive paste/enamel interfaces, although adhesive with functional monomers showed excellent adaptation, the functional monomer-free adhesive paste showed gap formation at the interface. These findings suggested that the pre-etching area greatly influenced bond strength, regardless of the presence or absence of the functional monomer in the orthodontic adhesive paste.

scholarly journals In vitro analysis of shear bond strength and adhesive remnant index comparing light curing and self-curing composites

2013 ◽  
Vol 18 (3) ◽  
pp. 124-129 ◽  
Author(s):  
Murilo Gaby Neves ◽  
Gustavo Antônio Martins Brandão ◽  
Haroldo Amorim de Almeida ◽  
Ana Maria Martins Brandão ◽  
Dário Ribeiro de Azevedo
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Bond Strength ◽  
Shear Bond Strength ◽  
Statistical Difference ◽  
Testing Machine ◽  
Adhesive Remnant Index ◽  
Light Curing ◽  
Scanning Electron

OBJECTIVE: To evaluate, in vitro, the shear bond strength of self-curing (ConciseTM - 3M and Alpha Plast - DFL) and light-curing composites (TransbondTM XT - 3M and Natural Ortho - DFL) used in orthodontics bonding, associated to Morelli metal brackets, with further analysis of adhesive remnant index (ARI) and enamel condition in scanning electron microscopy (SEM). METHODS: Forty human premolars, just extracted and stored in physiologic solution 0.9 % were used. Randomly, these samples were divided in four groups: G1 group, the brackets were bonded with ConciseTM - 3M composite; in G2 group, Alpha Plast - DFL composite was used; in G3 group, TransbondTM XT - 3M was used; in G4 group, Natural Ortho - DFL composite was used. These groups were submitted to shear strength tests in universal testing machine, at 0.5 mm per minute speed. RESULTS: Statistical difference between G3 and G4 groups was recorded, as G4 showing higher strength resistance than G3. In the other hand, there were no statistical differences between G1, G2 and G3 and G1, G2 and G4 groups. ARI analysis showed that there was no statistical difference between the groups, and low scores were recorded among then. The scanning electron microscopy (SEM) analysis revealed the debonding spots and the enamel surface integrity. CONCLUSIONS: Shear bond strength was satisfactory and similar between the composites, however Natural Ortho - DFL revealed best comparing to TransbondTM XT - 3M.

scholarly journals Reparability of Aged Silorane With Methacrylate-Based Resin Composite: Micro-Shear Bond Strength and Scanning Electron Microscopy Evaluation

2012 ◽  
Vol 37 (1) ◽  
pp. 28-36 ◽  
Author(s):  
L Giachetti ◽  
D Scaminaci Russo ◽  
M Baldini ◽  
C Goracci ◽  
M Ferrari
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Bond Strength ◽  
Intermediate Layer ◽  
Clinical Relevance ◽  
Shear Bond Strength ◽  
Resin Composite ◽  
Composite Restorations ◽  
Scanning Electron Microscopy Evaluation ◽  
Scanning Electron

Clinical Relevance Aged silorane composite restorations can be repaired with a methacrylate-based resin composite by using a phosphate-methacrylate–based adhesive as the intermediate layer.

scholarly journals Reconditioning of self-ligating brackets

2011 ◽  
Vol 82 (1) ◽  
pp. 158-164 ◽  
Author(s):  
Maria Francesca Sfondrini ◽  
Esmeralda Xheka ◽  
Andrea Scribante ◽  
Paola Gandini ◽  
Giuseppe Sfondrini
Keyword(s):  
Statistical Analysis ◽  
Bond Strength ◽  
Null Hypothesis ◽  
Shear Bond Strength ◽  
Testing Machine ◽  
Shear Mode ◽  
Universal Testing ◽  
Adhesive Remnant Index ◽  
Significant Difference ◽  
Scanning Electron

Abstract Objective: To test the null hypothesis that there is no significant difference in the shear bond strength (SBS) and Adhesive Remnant Index (ARI) scores of new vs reconditioned self-ligating brackets. Materials and Methods: One hundred and twenty permanent extracted bovine teeth were embedded in resin blocks. Three different new and reconditioned self-ligating orthodontic brackets (Smart Clip [3M Unitek]; Quick [Forestadent]; and Damon3MX [Ormco]) were tested. Scanning electron microphotographs of the different new (groups 1, 3, and 5) and reconditioned (groups 2, 4, and 6) bracket bases were taken before starting the experiments. Brackets were then bonded to the teeth using an orthodontic adhesive and were then tested in shear mode using an Instron Universal Testing Machine. ARI scores were then recorded. Statistical analysis was performed to determine significant differences in SBS and ARI Scores. Results: Smart Clip and Damon3MX reconditioned brackets showed significantly lower SBS than did new ones. On the contrary, Quick reconditioned brackets showed significantly higher SBS than did new ones. No significant differences in ARI scores were found after the reconditioning process for the three different brackets tested. Conclusion: The in-office reconditioning procedure alters the SBS of self-ligating brackets, although SBS values still remain clinically acceptable.

scholarly journals Effect of two erosive protocols using acidic beverages on the shear bond strength of orthodontic brackets to bovine enamel

2018 ◽  
Vol 23 (6) ◽  
pp. 64-72
Author(s):  
Catielma Nascimento Santos ◽  
Felipe de Souza Matos ◽  
Sigmar de Mello Rode ◽  
Paulo Francisco Cesar ◽  
Flávia Pardo Salata Nahsan ◽  
...  
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Artificial Saliva ◽  
Control Group ◽  
Lime Juice ◽  
Adhesive Remnant Index ◽  
Significant Difference ◽  
Microhardness Testing ◽  
Bovine Enamel

Abstract Objective: To assess the short-term effect of two in vitro erosive challenge protocols on the bond strength of metal orthodontic brackets on bovine enamel. Methods: Sixty bovine incisors were selected and randomly divided into six groups: AS7 (artificial saliva - 7 days, Control Group); CC7 (Coca-Cola™ - 7 days); LJ7 (lime juice - 7 days); AS30 (artificial saliva - 30 days, Control Group); CC30 (Coca-Cola™ - 30 days); LJ30 (lime juice - 30 days). Microhardness testing was performed prior to the erosive challenge to verify the standardization of samples. Immersion was performed 4x/day for five minutes, for either 7 or 30 days. After immersions were concluded, the brackets were bonded and shear bond strength was assessed after 48 hours. The Adhesive Remnant Index (ARI) was also assessed. Data were analyzed by two-way ANOVA, followed by Tukey’s post-hoc and Student’s t test for paired samples, and the Kruskal-Wallis non-parametric test (α = 5%). Results: The mean and standard deviation of microhardness testing of total samples were 281.89 ± 44.51 KHN. There was no statistically significant difference in shear bond strength for the time factor (7 or 30 days; F5.54= 0.105; p = 0.901). However, there was a statistically significant difference for the solution factor (F5.54= 6.671; p = 0.003). These differences occurred among solutions of Saliva x Coca-Cola™ (p = 0.003) and Coca-Cola™ x Lime Juice (p= 0.029). The assessment of the Adhesive Remnant Index showed no significant difference between groups. Conclusions: The immersion time used in the erosion protocols did not affect the bond strength of brackets to teeth. Coca-Cola™ induced significantly higher shear bond strength values than lime juice and artificial saliva. However, the short term effects of 7/30 days in this in vitro study may not be extrapolated for in vivo ones. Clinical studies should be conducted, substantiating the laboratory results.

scholarly journals Surface Characteristics, Fluoride Release and Bond Strength Evaluation of Four Orthodontic Adhesives

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3578
Author(s):  
Mihaela Pastrav ◽  
Andrea Maria Chisnoiu ◽  
Ovidiu Pastrav ◽  
Codruta Sarosi ◽  
Doina Pordan ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Atomic Force Microscopy ◽  
Bond Strength ◽  
Shear Bond Strength ◽  
Fluoride Release ◽  
Force Microscopy ◽  
Orthodontic Adhesives ◽  
Atomic Force ◽  
Scanning Electron

Orthodontic adhesives have similar properties in terms of fluoride release, roughness, shear bond strength or cement debris for specific clinical conditions. Three commercial consecrated orthodontic adhesives (Opal Seal®, Blugloo®, Light Bond®) were compared with an experimental orthodontic material (C1). Brackets were bonded to enamel using a self-etch technique followed by adhesive application and then de-bonded 60 days later. Share bond strength evaluation, scanning electron microscopy, atomic force microscopy and fluoride release analysis were performed. The highest amount of daily and cumulative fluoride release was obtained for the experimental material, while the lowest value was observed for Opal Seal®. The materials evaluated in the current study presented adequate shear bond strength, with the experimental material having a mean value higher than Opal Seal and Blugloo. The atomic force microscopy measurements indicated that the smoothest initial sample is Opal Seal® followed by Light Bond®. Scanning electron microscopy evaluation indicated different aspects of cement debris on the enamel and/or bracket surface, according to the type of adhesive. The experimental material C1 presented adequate properties in terms of shear bond strength, fluoride release, roughness and enamel characteristics after de-bonding, compared to the commercial materials. Under these circumstances, it can be considered for clinical testing.

scholarly journals Comparison of two adhesive systems of various polyetheretherketone (PEEK) composites on the shear bond strength

2021 ◽  
Vol 11 (2) ◽  
pp. 54-61
Author(s):  
Fatih Demirci ◽  
Samet Tekin
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Bond Strength ◽  
Surface Properties ◽  
Shear Bond Strength ◽  
Failure Modes ◽  
Testing Machine ◽  
Fiber Reinforced ◽  
Adhesive Systems ◽  
Scanning Electron

Aim: In this in vitro study, the effect of two adhesive systems applied to surfaces of different polyether-ether-ketone (PEEK) composites on the shear bond strength (SBS) of a composite resin was compared. Methodology: Eighty PEEK specimens were divided into four groups (n=20): Unfilled PEEK (UF), carbon-fiber-reinforced PEEK (CFR), glass-fiber-reinforced PEEK (GFR), and ceramic-reinforced PEEK (CR). Each group was further divided into two subgroups (n=10): Visio.link (VL) and Single Bond Universal (SB). The specimens with 8-mm diameter and 5-mm thickness were prepared. SBS was examined using a universal testing machine. Results were statistically analyzed by multivariate analysis of variance and Tukey’s post-hoc test. Failure modes were analyzed using a stereomicroscope at 20× magnification. Surface properties were examined by scanning electron microscopy. The surface properties of the specimens were examined by scanning electron microscopy (SEM).  Results: Effect of different PEEK and adhesive systems on SBS was found to be statistically significant (p<0.05). SBS values for CFR-VL and UF-VL groups were statistically more significant than those for CFR-SB and UF-SB groups (p=0.001). SBS values for the GFR-VL group were statistically more significant than that for the UF-VL group (p=0.001). SBS values for the CF-SB group were statistically more significant than those for CFR-SB and CFR-SB groups (p=0.001). Failure modes were examined using a stereomicroscope at 20× magnification, and adhesive and mixed failure modes were observed. Conclusion: PEEK composites with different contents and properties can be used in fixed prosthetic restorations. However, additional experimental and clinical studies are required to investigate different PEEK frameworks and composite veneers.   How to cite this article: Demirci F, Tekin S. Comparison of two adhesive systems of various polyetheretherketone (PEEK) composites on the shear bond strength. Int Dent Res 2021;11(2):54-61. https://doi.org/10.5577/intdentres.2021.vol11.no2.1   Linguistic Revision: The English in this manuscript has been checked by at least two professional editors, both native speakers of English.

scholarly journals Primer-Treated Ceramic Bracket Increases Shear Bond Strength on Dental Zirconia Surface

Materials ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 4106
Author(s):  
Ga-Youn Ju ◽  
Bum-Soon Lim ◽  
Wonjoon Moon ◽  
Shin-Young Park ◽  
Soram Oh ◽  
...  
Keyword(s):  
Electron Microscope ◽  
Bond Strength ◽  
Bonding Strength ◽  
Shear Bond Strength ◽  
Adhesive Failure ◽  
Adhesive Remnant Index ◽  
Significant Difference ◽  
Ceramic Bracket ◽  
Bracket Base ◽  
Scanning Electron

The purpose of this study is to evaluate the shear bond strength (SBS) of a primer-treated ceramic bracket on dental zirconia and to compare it with conventional ceramic bracket bonding on surface-treated zirconia. Sintered and finished dental zirconia was sandblasted. Samples were divided according to the treated surfaces: no treatment (X), ceramic primer on zirconia (Z), ceramic primer on bracket base (B), and ceramic primer on both zirconia and bracket base (ZB). The ceramic bracket was bonded on zirconia and SBS was measured before (T0) and after 10,000 cycles of thermocycling (Tf). The failed surfaces were examined under field emission scanning electron microscope (FE-SEM), and adhesive remnant index (ARI) was evaluated. SBS was significantly higher in ZB and significantly lower in X in both T0 and Tf. There was no significant difference between Z and B. In X and B, adhesive failure occurred while ZB showed mixed failures. There was no apparent change in the zirconia surface except for the existence of some adhesive and resin remnants. The application of ceramic primer on the bracket base increased the bonding strength to the level of conventional bonding with fewer adhesive remnants. The highest bonding strength was obtained when the primer-treated bracket was bonded on the primer-treated zirconia.

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