Air abrasion of failed bonded metal brackets: A study of shear bond strength and surface characteristics as determined by scanning electron microscopy

1996 ◽  
Vol 110 (1) ◽  
pp. 96-98 ◽  
Author(s):  
Andrew L. Sonis
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Bond Strength ◽  
Shear Bond Strength ◽  
Surface Characteristics ◽  
Air Abrasion ◽  
Scanning Electron

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 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 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.

THE SCANNING ELECTRON MICROSCOPIC MORPHOLOGY OF QUARTZ IN SELECTED SOILS FROM ALBERTA

1987 ◽  
Vol 67 (4) ◽  
pp. 965-971 ◽  
Author(s):  
J. M. W. BLACK ◽  
M. J. DUDAS
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Surface Morphology ◽  
Surface Characteristics ◽  
Fine Sand ◽  
Parent Material ◽  
Electron Microscopic ◽  
Physical Weathering ◽  
Silica Precipitation ◽  
Scanning Electron

This study compared the surface morphology of quartz grains from A and C horizons of a Chernozem, Luvisol and a Solonetz. Observations and chemical determinations were based on scanning electron microscopy and energy dispersive X-ray analysis of fine sand separates. Features indicative of glacial and eolian transport, physical weathering by low energy subaqueous impact, and chemical dissolution and silica precipitation dominated surface characteristics. Most surface morphological features were of an inherited origin since they were common to solum and parent material samples. Quartz dissolution features were not uniquely associated with solum samples and apparently not of pedogenic origin. Key words: Scanning electron microscopy, quartz, pedogenesis, surface morphology, weathering classification

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