scholarly journals Comparison of enamel bond fatigue durability between universal adhesives and two-step self-etch adhesives: Effect of phosphoric acid pre-etching

2018 ◽  
Vol 37 (2) ◽  
pp. 244-255 ◽  
Author(s):  
Shunichi SUDA ◽  
Akimasa TSUJIMOTO ◽  
Wayne W. BARKMEIER ◽  
Kie NOJIRI ◽  
Yuko NAGURA ◽  
...  
Keyword(s):  
Phosphoric Acid ◽  
Fatigue Durability ◽  
Universal Adhesives ◽  
Self Etch

Enamel Etching for Universal Adhesives: Examination of Enamel Etching Protocols for Optimization of Bonding Effectiveness

2020 ◽  
Vol 45 (1) ◽  
pp. 80-91
Author(s):  
J Wong ◽  
A Tsujimoto ◽  
NG Fischer ◽  
AG Baruth ◽  
WW Barkmeier ◽  
...  
Keyword(s):  
Phosphoric Acid ◽  
Surface Area ◽  
Adhesive Bonding ◽  
Sine Wave ◽  
Etching Time ◽  
Universal Adhesive ◽  
Staircase Method ◽  
Ground Enamel ◽  
Fatigue Durability ◽  
Universal Adhesives

SUMMARY Objective: The purpose of this study was to evaluate whether different enamel etching methods with reduced etching times would improve the bonding effectiveness of universal adhesives. Methods and Materials: Three enamel etching methods, phosphoric acid ester monomer (PPM) etching, phosphoric acid (PPA) etching, and polyalkenoic acid (PLA) etching, and three universal adhesives, G-Premio Bond (GP), Prime&Bond elect (PE), and Scotchbond Universal Adhesive (SU), were evaluated. Initial bond strengths and fatigue strengths of universal adhesives to ground enamel and ground enamel etched for less than one, five, 10, and 15 seconds using different etching methods were determined. The bonded fatigue specimens were loaded using a sine wave at a frequency of 20 Hz for 50,000 cycles or until failure occurred with a staircase method. Atomic force micrograph (AFM) observations along with measurements of surface Ra roughness and modified surface area of enamel with different etching protocols were also conducted. Results: The bond fatigue durability of universal adhesives to enamel with PPA etching from less than one to 15 seconds and PLA etching for 15 seconds was significantly higher than that to ground enamel. The bond fatigue durability to enamel with PPM etching was not increased compared with ground enamel. The surface Ra roughness and surface area obtained with AFM of enamel increased after PPA and PLA etching, and those values were significantly higher than those of ground enamel. Furthermore, surface Ra roughness and surface area with PPA etching were significantly higher than those with PLA etching. However, surface Ra roughness and surface area of enamel with PPM etching were similar to those of ground enamel regardless of etching time. Conclusion: PPA etching for less than one to 15 seconds and PLA etching for 15 seconds improve universal adhesive bonding, surface Ra roughness, and surface area of enamel. However, PPM etching is not effective, regardless of etching time, in improving bonds strengths, increasing surface roughness, and increasing surface area.

Comparison between universal adhesives and two-step self-etch adhesives in terms of dentin bond fatigue durability in self-etch mode

2017 ◽  
Vol 125 (3) ◽  
pp. 215-222 ◽  
Author(s):  
Akimasa Tsujimoto ◽  
Wayne W. Barkmeier ◽  
Toshiki Takamizawa ◽  
Hidehiko Watanabe ◽  
William W. Johnson ◽  
...  
Keyword(s):  
Fatigue Durability ◽  
Universal Adhesives ◽  
Self Etch

Effect of Different Protocols in Preconditioning With EDTA in Sclerotic Dentin and Enamel Before Universal Adhesives Applied in Self-etch Mode

2017 ◽  
Vol 42 (3) ◽  
pp. 284-296 ◽  
Author(s):  
EC Martini ◽  
SO Parreiras ◽  
MF Gutierrez ◽  
AD Loguercio ◽  
A Reis
Keyword(s):  
Bond Strength ◽  
Adhesive Systems ◽  
Microtensile Bond Strength ◽  
Universal Adhesive ◽  
Etching Pattern ◽  
Bonding Performance ◽  
Universal Adhesives ◽  
Microshear Bond Strength ◽  
Self Etch ◽  
Main Factor

SUMMARY Objectives: The aim of this study was to investigate the effect of different protocols of 17% ethylene diamine tetra-acetic acid (EDTA) conditioning on the etching pattern and immediate bond strength of universal adhesives to enamel and sclerotic dentin. Methods and Materials: Forty bovine teeth with sclerotic dentin and 20 human third molars were randomly divided into eight groups resulting from the combination of the main factors surface treatment (none, two-minute EDTA conditioning manual application, 30-second EDTA manual application, 30-second EDTA sonic application) and adhesives systems (Scotchbond Universal Adhesive [SBU] and Prime & Bond Elect [PBE]). Resin-dentin and enamel-dentin bond specimens were prepared and tested under the microtensile bond strength (μTBS) and microshear bond strength (μSBS) tests, respectively. The etching pattern produced on the unground enamel and the sclerotic dentin surfaces under the different protocols and adhesive systems was evaluated under scanning electron microscopy. Results: For enamel, only the main factor adhesive was significant (p<0.0001), with SBU showing the highest μSBS. In sclerotic dentin, the lowest mean was observed for the group without EDTA application and the highest mean in the group with EDTA application with the sonic device for 30 seconds. Regardless of the EDTA protocol, the highest means of μTBS were observed for SBU (p<0.05). Conclusions: EDTA conditioning improves the bonding performance of universal adhesives in the self-etch mode on sclerotic dentin, mainly when applied for 30 seconds with the aid of a sonic device. EDTA pretreatment also improves the retentive etching pattern of enamel, but it does not result in higher enamel bond strength.

scholarly journals Photopolymerization of phosphoric acid ester-based self-etch dental adhesives

2013 ◽  
Vol 32 (1) ◽  
pp. 10-18 ◽  
Author(s):  
Ying ZHANG ◽  
Yong WANG
Keyword(s):  
Phosphoric Acid ◽  
Acid Ester ◽  
Dental Adhesives ◽  
Phosphoric Acid Ester ◽  
Self Etch

scholarly journals Impact of Different Etching Strategies on Margin Integrity of Conservative Composite Restorations in Demineralized Enamel

Materials ◽  
2020 ◽  
Vol 13 (20) ◽  
pp. 4500
Author(s):  
Mohamed El Gedaily ◽  
Thomas Attin ◽  
Daniel B. Wiedemeier ◽  
Tobias T. Tauböck
Keyword(s):  
Phosphoric Acid ◽  
Clinical Success ◽  
Resin Composite ◽  
Key Factors ◽  
Composite Restorations ◽  
Carious Lesions ◽  
Demineralized Enamel ◽  
Bonded Composite ◽  
One Step ◽  
Self Etch

Good margin integrity with a tight seal of the adhesive interface is considered one of the key factors for the clinical success of composite restorations. This study investigated the effect of enamel etching with phosphoric acid on the margin integrity of self-etch bonded composite restorations in demineralized enamel. Crowns of bovine incisors were assigned into 14 groups (n = 10 per group) of which ten groups (groups 1–5 and 8–12) were demineralized (21 days, acid buffer, pH 4.95) to create artificial carious lesions. Standardized Class V cavities were prepared in all specimens. Demineralized groups were either etched with phosphoric acid for 10, 30, 60, or 120 s (groups 2–5 and 9–12), or no etching was performed (groups 1 and 8). The non-demineralized (sound) groups were etched for 10 s (groups 7 and 14) or remained non-etched (groups 6 and 13). Resin composite restorations were then placed using either a one-step (iBond Self Etch, groups 1–7) or two-step self-etch adhesive (Clearfil SE Bond, groups 8–14). Margin integrity of the restorations was assessed after thermocycling (5000×, 5–55 °C) using scanning electron microscopy, and the percentage of continuous margins (%CM) was statistically analyzed (α = 0.05). Phosphoric acid etching significantly increased %CM in both demineralized and sound enamel. For iBond Self Etch, a significant increase in %CM in demineralized enamel was observed with increased etching times. All etched groups treated with Clearfil SE Bond and those etched for 60 or 120 s and treated with iBond Self Etch showed similar %CM in demineralized enamel as in etched sound enamel, and significantly higher %CM than in non-etched sound enamel. In conclusion, enamel etching with phosphoric acid improves margin integrity of composite restorations in demineralized enamel when bonded with the examined adhesives.

scholarly journals Dentin Bonding and SEM Analysis of a New Experimental Universal Adhesive System Containing a Dendrimer

Polymers ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 461 ◽  
Author(s):  
Joana Vasconcelos e Cruz ◽  
Mário Polido ◽  
José Brito ◽  
Luisa L. Gonçalves
Keyword(s):  
Mixed Models ◽  
Dental Materials ◽  
Adhesive System ◽  
Sem Analysis ◽  
New Paradigm ◽  
Adhesive Properties ◽  
Universal Adhesive ◽  
Cross Sectional ◽  
Universal Adhesives ◽  
Self Etch

Due to their polymerization characteristics, hyper-branched dendrimers have lately shown to be promising candidates for use in dental materials. In this study, a new dental adhesive system was prepared, using a dendrimer derived from 2-isocyanatoethyl methacrylate (G-IEMA), and its adhesive properties were investigated. The exposed dentin was treated with four universal adhesives (UAs): SBU (Scotchbond Universal™), FUT (Futurabond M+™), AE1 (experimental adhesive with Bis-GMA) and AE2 (experimental adhesive with G-IEMA), using Etch & Rinse (ER) or Self Etch (SE) protocols. Composite build-ups were prepared and stored for 24 h at 37 °C in distilled water. Composite/dentin beams were prepared with cross-sectional areas of 1 ± 0.3 mm2 and µTBS (Micro-tensile bond strength) test was performed at 0.5 mm/min. Failures modes were evaluated by stereomicroscopy, and bonding interfaces were observed by scanning electron microscopy (SEM). Statistical analysis of µTBS data was performed using General Linear (GLM) and Linear Mixed Models (LMM). The effect of adhesive type on µTBS was significant (p = 0.010), with AE1 presenting significantly higher µTBS than SBU (p = 0.019). No other differences between adhesives were observed. ER showed significantly better results than SE (p = 0.019), and no significant interactions between the adhesives and protocols were determined. Results obtained so far pinpoint the emergence of a new paradigm in the dental materials field, as G-IEMA can be used successfully as an alternative to Bis-GMA.

Effect of Phosphoric Acid Pre-etching on Fatigue Limits of Self-etching Adhesives

2015 ◽  
Vol 40 (4) ◽  
pp. 379-395 ◽  
Author(s):  
T Takamizawa ◽  
WW Barkmeier ◽  
A Tsujimoto ◽  
DD Scheidel ◽  
RL Erickson ◽  
...  
Keyword(s):  
Phosphoric Acid ◽  
Fatigue Testing ◽  
Resin Composite ◽  
Metal Ring ◽  
Staircase Method ◽  
Shear Fatigue ◽  
Human Enamel ◽  
Tooth Surfaces ◽  
Post Hoc ◽  
Self Etch

SUMMARY The purpose of this study was to use shear bond strength (SBS) and shear fatigue limit (SFL) testing to determine the effect of phosphoric acid pre-etching of enamel and dentin prior to application of self-etch adhesives for bonding resin composite to these substrates. Three self-etch adhesives—1) G- ænial Bond (GC Corporation, Tokyo, Japan); 2) OptiBond XTR (Kerr Corp, Orange, CA, USA); and 3) Scotchbond Universal (3M ESPE Dental Products, St Paul, MN, USA)—were used to bond Z100 Restorative resin composite to enamel and dentin surfaces. A stainless-steel metal ring with an inner diameter of 2.4 mm was used to bond the resin composite to flat-ground (4000 grit) tooth surfaces for determination of both SBS and SFL. Fifteen specimens each were used to determine initial SBS to human enamel/dentin, with and without pre-etching with a 35% phosphoric acid (Ultra-Etch, Ultradent Products Inc, South Jordan, UT, USA) for 15 seconds prior to the application of the adhesives. A staircase method of fatigue testing (25 specimens for each test) was then used to determine the SFL of resin composite bonded to enamel/dentin using a frequency of 10 Hz for 50,000 cycles or until failure occurred. A two-way analysis of variance and Tukey post hoc test were used for analysis of SBS data, and a modified t-test with Bonferroni correction was used for the SFL data. Scanning electron microscopy was used to examine the area of the bonded restorative/tooth interface. For all three adhesive systems, phosphoric acid pre-etching of enamel demonstrated significantly higher (p<0.05) SBS and SFL with pre-etching than it did without pre-etching. The SBS and SFL of dentin bonds decreased with phosphoric acid pre-etching. The SBS and SFL of bonds using phosphoric acid prior to application of self-etching adhesives clearly demonstrated different tendencies between enamel and dentin. The effect of using phosphoric acid, prior to the application of the self-etching adhesives, on SBS and SFL was dependent on the adhesive material and tooth substrate and should be carefully considered in clinical situations.

scholarly journals Effect of the application time of phosphoric acid and self-etch adhesive systems to sclerotic dentin

2013 ◽  
Vol 21 (2) ◽  
pp. 196-202 ◽  
Author(s):  
Alexandra Patricia Mena-Serrano ◽  
Eugenio Jose Garcia ◽  
Miguel Munoz Perez ◽  
Gislaine Cristine Martins ◽  
Rosa Helena Miranda Grande ◽  
...  
Keyword(s):  
Phosphoric Acid ◽  
Application Time ◽  
Adhesive Systems ◽  
Self Etch
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