Shear Bond Strength of Metal Brackets Recycling with Aluminum Oxide

2020 ◽  
Vol 8 (1) ◽  
pp. 31-36
Author(s):  
Téssia Richelly Nóbrega Borja de Melo ◽  
◽  
Michel Nicolau Youssef
Keyword(s):  
Bond Strength ◽  
Aluminum Oxide ◽  
Shear Bond Strength

scholarly journals Bond Strength Assessment Between Acrylic Teeth and Acrylic Resin Repairs: Effect of Different Surface Treatments

2016 ◽  
Vol 18 (2) ◽  
pp. 109
Author(s):  
M.T. Muñoz MSc ◽  
E. Reales DDS ◽  
L.H.M. Prates DDS, MSc, PhD ◽  
C.A.M. Volpato DDS, MSc, PhD
Keyword(s):  
Bond Strength ◽  
Aluminum Oxide ◽  
Surface Treatment ◽  
Shear Bond Strength ◽  
Testing Machine ◽  
Acrylic Resin ◽  
Surface Treatments ◽  
Strength Assessment ◽  
Chemical Treatments ◽  
Post Hoc

The aim of this study was to compare the shear bond strength between acrylic resin teeth and autopolymerizing acrylic resin repairs after different surface treatments. Seventy-two upper anterior acrylic resin denture teeth (MFT, Vita, Germany) were selected. Specimens were randomly assigned into six groups (n=12): G1-C, without surface treatment (control); G2-M, methylmetacrylate monomer (Jet, Clássico, Brazil) application; G3-A treatment with methylmetacrylate and metiletilcetone-based bonding agent (Vitacoll, Vita, Germany). The surface of G4-OA, G5-OAM and G6-OAA was airborne-particle abraded with aluminum oxide (Polidental, Wilson, Brazil); being repeated the treatments respectively of groups G1-C, G2-M e G3-A. All groups were then repaired with autopolymerizing acrylic resin (Jet, Clássico, Brazil). Shear bond strength test was performed using an universal testing machine (Instron 4444). Two-way ANOVA and post hoc Tukey’s analysis (p<0,05) were used for statistical comparison. The shear bond strengths of groups G4-OA, G5-OAM and G6-OAA were significantly higher (p<0,05) than that of groups G1-C, G2-M and G3-A. The shear bond strength of Group G3-A were significantly higher (p<0,05) than that of groups G1-C and G2-M. In conclution, chemical treatments in combination with bondig agents showed significant improvements in bond strength without aluminum oxide treatment. More significantly, surface treatment with aluminum oxide particles resulted in the highest bond strength values for acrylic resin teeth repaired with autopolymerizing acrylic resin. 

scholarly journals Influence of surface treatment on shear bond strength of orthodontic brackets

2013 ◽  
Vol 18 (3) ◽  
pp. 54-62 ◽  
Author(s):  
Ione Helena Vieira Portella Brunharo ◽  
Daniel Jogaib Fernandes ◽  
Mauro Sayão de Miranda ◽  
Flavia Artese
Keyword(s):  
Bond Strength ◽  
Aluminum Oxide ◽  
Sodium Bicarbonate ◽  
Surface Treatment ◽  
Hydrofluoric Acid ◽  
Shear Bond Strength ◽  
Resin Composite ◽  
Orthodontic Brackets ◽  
Treatment Methods ◽  
Hybrid Resin

INTRODUCTION: The shear bond strength of orthodontic brackets bonded to micro-hybrid and micro-particulate resins under different surface treatment methods was assessed. METHODS: Two hundred and eighty test samples were divided into 28 groups (n = 10), where 140 specimens were filled with Durafill micro-particulate resin and 140 with Charisma composite. In 140 samples, a coupling agent (silane) was applied. The surface treatment methods were: Phosphoric and hydrofluoric acid etching, sodium bicarbonate and aluminum oxide blasting, stone and burs. A Universal Instron Machine was used to apply an occlusal shear force directly to the resin composite bracket surface at a speed of 0.5 mm/min. The means were compared using analysis of variance and multivariate regression to assess the interaction between composites and surface treatment methods. RESULTS: Means and standard deviations for the groups were: Sodium bicarbonate jet 11.27±2.78; burs 9.26±3.01; stone 7.95±3.67; aluminum oxide blasting 7.04±3.21; phosphoric acid 5.82±1.90; hydrofluoric acid 4.54±2.87, and without treatment 2.75±1.49. An increase of 1.94 MPa in shear bond strength was seen in Charisma groups. Silane agent application reduced the Charisma shear bond strength by 0.68 Mpa, but increased Durafill means for bicarbonate blasting (0.83), burs (0.98) and stone drilling (0.46). CONCLUSION: The sodium bicarbonate blasting, burs and stone drilling methods produced adequate shear bond strength and may be suitable for clinical use. The Charisma micro hybrid resin composite showed higher shear bond means than Durafill micro particle composite.

scholarly journals Effects of surface treatment of provisional crowns on the shear bond strength of brackets

2013 ◽  
Vol 18 (4) ◽  
pp. 29-34 ◽  
Author(s):  
Josiane Xavier de Almeida ◽  
Mauren Bitencourt Deprá ◽  
Mariana Marquezan ◽  
Luciana Borges Retamoso ◽  
Orlando Tanaka
Keyword(s):  
Bond Strength ◽  
Aluminum Oxide ◽  
Surface Treatment ◽  
Shear Bond Strength ◽  
Composite Resin ◽  
Acrylic Resin ◽  
Surface Treatments ◽  
Surface Roughening ◽  
Bonding Material ◽  
Adhesive Remnant Index

OBJECTIVE: To assess the adhesive resistance of metallic brackets bonded to temporary crowns made of acrylic resin after different surface treatments. METHODS: 180 specimens were made of Duralay and randomly divided into 6 groups (n = 30) according to surface treatment and bonding material: G1 - surface roughening with Soflex and bonding with Duralay; G2 - roughening with aluminum oxide blasting and bonding with Duralay; G3 - application of monomer and bonding with Duralay; G4 - roughening with Soflex and bonding with Transbond XT; G5 - roughening with aluminum oxide blasting and bonding with Transbond XT and G6: application of monomer and bonding with Transbond. The results were statistically assessed by ANOVA/Games-Howell. RESULTS: The means (MPa) were: G1= 18.04, G2= 22.64, G3= 22.4, G4= 9.71, G5= 11.23, G6= 9.67. The Adhesive Remnant Index (ARI) ranged between 2 and 3 on G1, G2 and G3 whereas in G4, G5 and G6 it ranged from 0 to 1, showing that only the material affects the pattern of adhesive flaw. CONCLUSION: The surface treatment and the material influenced adhesive resistance of brackets bonded to temporary crowns. Roughening by aluminum blasting increased bond strength when compared to Soflex, in the group bonded with Duralay. The bond strength of Duralay acrylic resin was superior to that of Transbond XT composite resin.

Shear Bond Strength of Resin Cement Bonded to Alumina Ceramic after Treatment by Aluminum Oxide Sandblasting or Silica Coating

2011 ◽  
Vol 20 (7) ◽  
pp. 561-565 ◽  
Author(s):  
Sheila Pestana Passos ◽  
Luiz Felipe Valandro ◽  
Marco Antonio Bottino ◽  
Maria Jacinta Moraes Coelho Santos ◽  
Gildo Coelho Santos Jr
Keyword(s):  
Bond Strength ◽  
Aluminum Oxide ◽  
Shear Bond Strength ◽  
Silica Coating ◽  
Alumina Ceramic ◽  
Resin Cement

Influence of Aluminum Oxide Sandblasting Associated with Nd:YAG or Er:YAG Lasers on Shear Bond Strength of a Feldspathic Ceramic to Resin Cements

2010 ◽  
Vol 28 (4) ◽  
pp. 471-475 ◽  
Author(s):  
Stella da Silva Ferreira ◽  
Fernando Seishim Hanashiro ◽  
Wanessa Christine de Souza-Zaroni ◽  
Miriam Lacalle Turbino ◽  
Michel Nicolau Youssef
Keyword(s):  
Bond Strength ◽  
Aluminum Oxide ◽  
Shear Bond Strength ◽  
Resin Cements

Shear Bond Strength of Porcelain Veneers Rebonded to Enamel

2015 ◽  
Vol 40 (3) ◽  
pp. E112-E121 ◽  
Author(s):  
HA St Germain ◽  
TH St Germain
Keyword(s):  
Phosphoric Acid ◽  
Bond Strength ◽  
Aluminum Oxide ◽  
Shear Bond Strength ◽  
Resin Cement ◽  
Enamel Surface ◽  
Control Group ◽  
Significant Difference ◽  
Mode Of Failure ◽  
Group A

SUMMARY In this laboratory research, shear bond strength (SBS) and mode of failure of veneers rebonded to enamel in shear compression were determined. Three groups (A, B, and C; n=10 each) of mounted molar teeth were finished flat using wet 600-grit silicon carbide paper, and 30 leucite-reinforced porcelain veneers (5.0 × 0.75 mm) were air abraded on the internal surface with 50 μm aluminum oxide, etched with 9.5% hydrofluoric acid, and silanated. The control group (A) veneer specimens were bonded to enamel after etching with 37% phosphoric acid using bonding resin and a dual cure resin composite cement. Groups B and C were prepared similarly to group A with the exception that a release agent was placed before the veneer was positioned on the prepared enamel surface and the resin cement was subsequently light activated. The debonded veneers from groups B and C were placed in a casting burnout oven and heated to 454°C/850°F for 10 minutes to completely carbonize the resin cement and stay below the glass transition temperature (Tg) of the leucite-reinforced porcelain. The recovered veneers were then prepared for bonding. The previously bonded enamel surfaces in group B were air abraded using 50 μm aluminum oxide followed by 37% phosphoric acid etching, while group C enamel specimens were acid etched only. All specimens were thermocycled between 5°C and 55°C for 2000 cycles using a 30-second dwell time and stored in 37°C deionized water for 2 weeks. SBS was determined at a crosshead speed of 1.0 mm/min. SBS results in MPa for the groups were (A) = 20.6±5.1, (B) = 18.1±5.5, and (C) = 17.2±6.1. One-way analysis of variance indicated that there were no significant interactions (α=0.05), and Tukey-Kramer post hoc comparisons (α=0.05) detected no significant pairwise differences. An adhesive mode of failure at the enamel interface was observed to occur more often in the experimental groups (B = 40%, C = 50%). Rebonding the veneers produced SBS values that were not significantly different from the control group. Also, no significant difference in SBS values were observed whether the debonded enamel surface was air abraded and acid etched or acid etched only.

scholarly journals Bond strength of orthodontic brackets to polymethylmethacrylate: effect of the surface treatment and adhesive system

2021 ◽  
Vol 62 (1) ◽  
Author(s):  
Rita Cardoso ◽  
◽  
Joana Godinho ◽  
Luís Jardim ◽  
◽  
...  
Keyword(s):  
Bond Strength ◽  
Aluminum Oxide ◽  
Surface Treatment ◽  
Failure Mode ◽  
Shear Bond Strength ◽  
Adhesive System ◽  
Orthodontic Brackets ◽  
Control Group ◽  
Universal Adhesive ◽  
Machine Failure

Objectives: To evaluate the influence of the surface treatment and adhesive system on the shear bond strength and the failure mode of orthodontic brackets bonded to polymethylmethacrylate surfaces. Methods: Ninety metal brackets (n=15) were bonded to aged discs of polymethylmethacrylate SR Ivocron subjected to three surface conditions (no treatment; sandblasting with 50-μm aluminum oxide; roughening with a tungsten bur), using two combinations of adhesives (methylmethacrylate monomer + Transbond XT Primer; Scotchbond Universal Adhesive) followed by the composite Transbond XT. In the control group, metal brackets were bonded with Transbond XT to 15 human mandibular incisors. The specimens were thermocycled, stored in distilled water (37ºC, 7 days), and tested in shear, using an Instron universal machine. Failure mode was classified according to the adhesive remnant index using a stereomicroscope. The data were analyzed with an analysis of variance and posthoc tests (p<0.05). Results: Significant differences were found between the bracket bond strength to polymethylmethacrylate with different surface treatments (p<0.001). Sandblasting with aluminum oxide was superior to tungsten bur roughening. The adhesive system did not significantly influence the shear bond strength nor the failure mode (p=0.8415). All experimental groups showed lower bond strengths than the control group (p=0.1566). Conclusions: Mechanical surface treatment significantly influenced the bracket’s bond strength to polymethylmethacrylate. Sandblasting with aluminum oxide was the most effective mechanical treatment. The weakest adhesive link was found at the acrylic-adhesive interface. Orthodontic bonding to polymethylmethacrylate was weaker than bonding to enamel, regardless of the surface treatment and the adhesive used.

scholarly journals Effect of aluminum oxide sandblasting, plasma application and their combination on the bond strength of resin cement to zirconia ceramics

2019 ◽  
Vol 22 (2) ◽  
pp. 275-280
Author(s):  
Beatriz Curvello de Mendonça ◽  
William Matthew Negreiros ◽  
Marcelo Giannini
Keyword(s):  
Bond Strength ◽  
Aluminum Oxide ◽  
Shear Bond Strength ◽  
Argon Plasma ◽  
Resin Cement ◽  
Zirconia Ceramics ◽  
Resin Cements ◽  
Silicon Matrix ◽  
One Year ◽  
Post Hoc

Objective: to evaluate the effect of aluminum oxide sandblasting (AOS), argon plasma application (APL) and their combination (AOS+APL) on the shear bond strength (SBS) of dual-cure resin cement (Panavia F 2.0, Kuraray Noritake) to two zirconiabased ceramics (Lava, 3M ESPE and Katana, Kuraray Noritake). Material and Methods: One hundred twenty zirconia plates (13 mm in length X 5 mm in width X 1 mm in thickness) were prepared and treated according to the following treatments: 1- AOS, 2- APL,3- AOS+APL and 4- no treatment (control). After treatments, resin cement cylinders (1.4 mm in diameter x 1 mm in height) bonded to zirconia surface were obtained by filling up the silicon matrix. The shear bond test was performed following storage of the samples for 24 hours and one year. Bond strength values were recorded in MPa and the data were analyzed by three-way ANOVA and Tukey post-hoc test (preset alpha of 0.05). Results: In general, AOS and AOS+APL showed the higher SBS. After one-year storage, SBS of the resin cement to the Katana zirconia did not reduce, regardless of the zirconia surface treatment. Conclusion: AOS alone was able to increase the SBS of the resin cement to both zirconia ceramics compared to control and SBS remained stable after one year depending on type of zirconia ceramic.KeywordsAluminum Oxide; Ceramics; Plasma; Resin Cements

scholarly journals Shear bond strength of enamel surface treated with air-abrasive system

2002 ◽  
Vol 13 (3) ◽  
pp. 175-178 ◽  
Author(s):  
Maria Cristina Borsatto ◽  
Alma Blásida Elisaur Benitez Catirse ◽  
Regina Guenka Palma Dibb ◽  
Telma Nunes do Nascimento ◽  
Renata Andréa Salvitti de Sá Rocha ◽  
...  
Keyword(s):  
Phosphoric Acid ◽  
Bond Strength ◽  
Aluminum Oxide ◽  
Shear Bond Strength ◽  
Composite Resin ◽  
Enamel Surface ◽  
Acid Etching ◽  
Air Abrasion ◽  
Group Iii ◽  
Group I

The aim of this study was to evaluate the shear bond strength of a composite resin to dental enamel, using three different surface treatments. Fifteen sound third molars were randomly assigned to three groups. The mesial and distal surfaces were flattened and covered using adhesive tape with a central orifice delimiting the adhesion area (7.07 mm²). Group I, the enamel surface was conditioned with 37% phosphoric acid for 15 s; group II, the surface was treated using air abrasion with aluminum oxide; group III, the enamel surface was treated using an association of air abrasion with aluminum oxide and 37% phosphoric acid. The Single Bond (3M) adhesive system was applied and a Teflon matrix was placed and filled with composite resin Z-100 (3M) and light-cured. The shear bond strength test was performed with a universal testing machine. The acid etching technique and air abrasion with aluminum oxide associated with acid etching had the highest shear bond strength values. Data were subjected to statistical analysis using ANOVA and the Tukey test, and no statistically significant difference in shear bond strength was observed between group I (12.49 ± 2.85 MPa) and group III (12.59 ± 2.68 MPa). In contrast, both groups had statistically better shear bond strengths compared to group II (0.29 ± 0.56 MPa; p<0.05). Air abrasion with aluminum oxide does not substitute acid etching. The association of these methods to obtain adequate adhesion to the substrate is necessary.

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