Influence of in Situ Postbleaching Times on Shear Bond Strength of Resin-Based Composite Restorations

2010 ◽  
Vol 141 (3) ◽  
pp. 300-306 ◽  
Author(s):  
Marcos Eugenio Bittencourt ◽  
Micheline Sandini Trentin ◽  
Maria Salete Sandini Linden ◽  
Ynara Bosco de Oliveira Lima Arsati ◽  
Fabiana Mantovani Gomes França ◽  
...  
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Composite Restorations

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 Effect of different surface treatments on shear bond strength of ceramic brackets to old composite

2020 ◽  
Vol 24 (1) ◽  
Author(s):  
Homa Farhadifard ◽  
Loghman Rezaei-Soufi ◽  
Maryam Farhadian ◽  
Parisa Shokouhi
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
In Vitro Study ◽  
Surface Treatments ◽  
Composite Resins ◽  
Control Group ◽  
Composite Restorations ◽  
Ceramic Brackets ◽  
Aged Composite

Abstract Background At present, the demand for orthodontic treatment is on the rise. On the other hand, evidence shows that the bond strength of composite resins to old composite restorations is often unreliable. Therefore, the aim of this in vitro study was to assess the effect of different surface treatments on shear bond strength (SBS) of ceramic brackets to old composite restorations. Methods In this in vitro experimental study, 60 nano-hybrid composite discs were fabricated. For aging, the discs were incubated in deionized water at 37 °C for 1 month. Next, they underwent 4 different surface treatments namely acid etching with 37% phosphoric acid, sandblasting, grinding, and Er,Cr:YSGG laser irradiation. Ceramic brackets were then bonded to the discs and underwent SBS testing. Results The maximum mean SBS value was obtained in the grinding group (9.16 ± 2.49 MPa), followed by the sandblasting (8.13 ± 2.58 MPa) and laser (6.57 ± 1.45 MPa) groups. The minimum mean SBS value was noted in the control group (5.07 ± 2.14 MPa). Conclusion All groups except for the control group showed clinically acceptable SBS. Therefore, grinding, sandblasting, and Er,Cr:YSGG laser are suggested as effective surface treatments for bonding of ceramic orthodontic brackets to aged composite.

Microleakage and Shear Bond Strength of Composite Restorations Under Cycling Conditions

2017 ◽  
Vol 42 (2) ◽  
pp. E71-E80 ◽  
Author(s):  
RF Zanatta ◽  
M Lungova ◽  
AB Borges ◽  
CRG Torres ◽  
H-G Sydow ◽  
...  
Keyword(s):  
Bond Strength ◽  
Thermal Cycling ◽  
Shear Bond Strength ◽  
Composite Resin ◽  
Control Group ◽  
Strength Testing ◽  
Class V ◽  
Composite Restorations ◽  
Etch And Rinse ◽  
Self Etch

SUMMARY Objectives: The aim of this study was to evaluate microleakage and shear bond strength of composite restorations under different cycling conditions. Methods and Materials: Class V cavities were prepared in the buccal and lingual surfaces of 30 human molars (n=60). A further 60 molars were used to prepare flat enamel and dentin specimens (n=60 each). Cavities and specimens were divided into six groups and pretreated with an adhesive (self-etch/Clearfil SE Bond or etch-and-rinse/Optibond FL). Composite was inserted in the cavities or adhered to the specimens' surfaces, respectively, and submitted to cycling (control: no cycling; thermal cycling: 10,000 cycles, 5°C to 55°C; thermal/erosive cycling: thermal cycling plus storage in hydrochloric acid pH 2.1, 5 minutes, 6×/day, 8 days). Microleakage was quantified by stereomicroscopy in enamel and dentin margins after immersion in silver nitrate. Specimens were submitted to shear bond strength testing. Statistical analysis was done by two-way analysis of variance and Kruskal-Wallis tests (p<0.05). Results: Microleakage in enamel margins was significantly lower in the control group compared with thermal cycling or thermal/erosive cycling. Erosive conditions increased microleakage compared with thermal cycling (significant only for Clearfil SE Bond). No significant differences were observed in dentin margins. Bond strength of enamel specimens was reduced by thermal cycling and thermal/erosive cycling when Clearfil SE Bond was used and only by thermal/erosive cycling when Optibond FL was used. No differences were observed among dentin specimens. Conclusions: Thermal/erosive cycling can adversely affect microleakage and shear bond strength of composite resin bonded to enamel.

scholarly journals Oxygen release, microleakage and shear bond strength of composite restorations after home dental bleaching

2011 ◽  
Vol 26 (1) ◽  
pp. 45-49 ◽  
Author(s):  
Marcelo Tomás de Oliveira ◽  
Mauro Amaral Caldeira de Andrade ◽  
Márcia Michels
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Oxygen Release ◽  
Dental Bleaching ◽  
Composite Restorations

scholarly journals Relationships between Flexural and Bonding Properties, Marginal Adaptation, and Polymerization Shrinkage in Flowable Composite Restorations for Dental Application

Polymers ◽  
2021 ◽  
Vol 13 (16) ◽  
pp. 2613
Author(s):  
Akimasa Tsujimoto ◽  
Masao Irie ◽  
Erica Cappelletto Nogueira Teixeira ◽  
Carlos Alberto Jurado ◽  
Yukinori Maruo ◽  
...  
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Early Stage ◽  
Flexural Properties ◽  
Marginal Adaptation ◽  
Polymerization Shrinkage ◽  
Flowable Composite ◽  
Composite Restorations ◽  
Bonding Properties ◽  
Flowable Composites

To evaluate the flexural and bonding properties, marginal adaptation, and polymerization shrinkage in flowable composite restorations and their relationships, four new generation flowable composites, one conventional, and one bulk-fill flowable composite were used in this study. Flexural properties of the composites and shear bond strength to enamel and dentin for flowable restorations were measured immediately and 24 h after polymerization. Marginal adaptation, polymerization shrinkage, and stress were also investigated immediately after polymerization. The flexural properties, and bond strength of the flowable composites to enamel and dentin were much lower immediately after polymerization than at 24 h, regardless of the type of the composite. Polymerization shrinkage and stress varied depending on the material, and bulk-fill flowable composite showed much lower values than the others. The marginal adaptation and polymerization shrinkage of the composites appeared to have a much stronger correlation with a shear bond strength to dentin than to enamel. The weak mechanical properties and bond strengths of flowable composites in the early stage after polymerization must be taken into account when using them in the clinic. In addition, clinicians should be aware that polymerization shrinkage of flowable composites can still lead to the formation of gaps and failure of adaptation to the cavity regardless of the type of composite.

scholarly journals Low-concentrated nonvital bleaching effect on bond strength of composite resin restorations

2016 ◽  
Vol 19 (3) ◽  
pp. 82
Author(s):  
Fabiana Gomes Néspoli ◽  
Norberti Bernardineli ◽  
Roberto Brandão Garcia ◽  
Clovis Monteiro Bramante ◽  
Etiene Andrade Munhoz ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Bond Strength ◽  
Shear Bond Strength ◽  
Resin Composite ◽  
Positive Control ◽  
Negative Control ◽  
Control Group ◽  
Sodium Perborate ◽  
Short Term ◽  
Composite Restorations

<p><strong>Objective:</strong> To investigate if short-term dentin bleaching with low-concentrated substances affects the bond strength of immediate resin composite restorations. <strong>Material and Methods:</strong> The buccal surfaces of fifty molar crowns were ground for dentin exposure and randomly assigned into 5 groups (n=10), according to the following treatments: sodium perborate + water; sodium perborate + 6% hydrogen peroxide; 6% hydrogen peroxide; 35% hydrogen peroxide (positive control), or no bleaching agent (negative control). The specimens were immediately restored with resin composite. Seven days after treatments, the shear bond test was performed in a universal test machine at a crosshead speed of 0.5 mm/min. Data were analyzed using ANOVA and Tukey’s HSD test (α = 0.05). <strong>Results:</strong> The shear bond strength mean values for the negative control group were higher than all experimental and positive control groups (p &lt; 0.000), whose differences were not statistically significant (p &gt; 0.05). <strong>Conclusion:</strong> Short-term dentin bleaching with sodium perborate+water, 6% hydrogen peroxide, or sodium perborate mixed with 6% hydrogen peroxide reduced the shear bond strength of immediate resin composite restorations.</p><p> </p><p><strong>Keywords</strong></p><p>Resins, synthetic; Hydrogen peroxide; Shear strength; Esthetics; Tooth.</p><div><hr align="left" size="1" width="33%" /><div><p> </p></div></div>

scholarly journals Joggle lap shear testing of deep occlusal composite restorations lined with Dycal, Dycal LC, conventional or resin-modified glass ionomer

2017 ◽  
Vol 74 (5) ◽  
pp. 410-419
Author(s):  
Vera Stojanovska ◽  
Chris Ivanoff ◽  
Ilijana Muratovska ◽  
Lidija Popovska ◽  
Franklin Garcia-Godoy ◽  
...  
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Testing Machine ◽  
Dental Restoration ◽  
Glass Ionomer ◽  
Composite Restorations ◽  
Lap Shear ◽  
Group I ◽  
Resin Modified Glass Ionomer ◽  
Bond Strengths

Background/Aim. The longevity of a dental restoration may be predicted to some degree by its adhesive ability, and this, in turn, can be measured by bond strength testing between restorative materials and tooth structure. The aim of this study was to test an innovative joggle lap shearing jig that integrates the tooth and the entire biomechanical unit into testing, to compare the shear bond strengths of Class I occlusal composite restorations in deep cavity preparations lined with Dycal, Dycal LC, conventional glass ionomer or resin-modified glass ionomer. The mode of failure (adhesive, cohesive, mixed) after debonding was determined by stereomicroscopy. Methods. A total of 150 standardized occlusal cavities were prepared and divided into five groups. The group I cavities (n = 30) were coated with adhesive (ExciTE?F) and filled directly with composite (TetricEvoCeram). The group II and III cavities were lined with Dycal (n = 30) or Dycal LC (n = 30) before placing composite. The groups IV and V specimens were based with Fuji IX (n = 30) or Fuji II LC (n = 30). Shear bond strengths were determined with a universal testing machine and fractured bonding sites were analyzed under stereomicroscope. The mean bond strengths were analyzed using one-way ANOVA test (p < 0.05) and the means between the groups were analyzed with Student?s t-test. Results. The shear bond strength (MPa) of composite restorations in cavities without base (23.91 ? 4.54) was higher than cavities lined with Fuji II LC (17.45 ? 2.74), Fuji IX (8.76 ? 2.57), Dycal LC (13.07 ? 1.84) or Dycal (6.12 ? 1.28). The results using the jogged lap shearing jig were consistent with the literature. Conclusion. The shear bond strength of occlusal composite restorations in deep cavities without liners was greater than cavities lined with Fuji II LC > Fuji IX > Dycal LC > Dycal.

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