scholarly journals Meta-analytical Review of Parameters Involved in Dentin Bonding

2011 ◽  
Vol 91 (4) ◽  
pp. 351-357 ◽  
Author(s):  
J. De Munck ◽  
A. Mine ◽  
A. Poitevin ◽  
A. Van Ende ◽  
M.Vivan Cardoso ◽  
...  
Keyword(s):  
Bond Strength ◽  
Water Storage ◽  
High Sensitivity ◽  
Strength Testing ◽  
Discriminative Power ◽  
Strength Data ◽  
Weighted Means ◽  
Strength Tests ◽  
Analytical Review

Bond-strength testing is the method most used for the assessment of bonding effectiveness to enamel and dentin. We aimed to disclose general trends in adhesive performance by collecting dentin bond-strength data systematically. The PubMed and EMBASE databases were used to identify 2,157 bond-strength tests in 298 papers. Most used was the micro-tensile test, which appeared to have a larger discriminative power than the traditional macro-shear test. Because of the huge variability in dentin bond-strength data and the high number of co-variables, a neural network statistical model was constructed. Variables like ‘research group’ and ‘adhesive brand’ appeared most determining. Weighted means derived from this analysis confirmed the high sensitivity of current adhesive approaches (especially of all-in-one adhesives) to long-term water-storage and substrate variability.

Experimental HEMA-free self-etching adhesive: Effect of long-term water storage on bond strength

2010 ◽  
Vol 26 ◽  
pp. e2-e3
Author(s):  
C.H. Zanchi ◽  
A. Bertacci ◽  
E.A. Münchow ◽  
F.A. Ogliari ◽  
E. Piva ◽  
...  
Keyword(s):  
Bond Strength ◽  
Water Storage ◽  
Adhesive Effect

scholarly journals Influence of chlorhexidine on longitudinal bond strength to dentin: in vitro study

2017 ◽  
Vol 20 (1) ◽  
pp. 17 ◽  
Author(s):  
Beatriz Maria Fonseca ◽  
Daphne Camara Barcellos ◽  
César Rogério Pucci ◽  
Eduardo Bresciani ◽  
Maria Amélia Máximo de Araújo
Keyword(s):  
Phosphoric Acid ◽  
Bond Strength ◽  
Water Storage ◽  
In Vitro Study ◽  
Chlorhexidine Gluconate ◽  
Acid Etching ◽  
Single Bond ◽  
Etch And Rinse

<p><strong>Objective</strong>: This study evaluated the effect of 0.2% chlorhexidine gluconate solution used as an therapeutic primer on the long-term bond strength of etch-and-rinse adhesive to dentin. <strong>Material</strong> <strong>and</strong> <strong>Methods</strong>: Bovine incisors were worn to expose an area of dentin and were divided into 2 groups: Group C (Control) - acid etching with 37% phosphoric acid + Single Bond; Group CHX (0.2% CHX) - acid etching with 37% phosphoric acid + 0.2% CHX for 30 s + Single Bond. Blocks of composite were fabricated and stored for 24 h or 6 months, sectioned into beams and submitted to microtensile tests. Results were analyzed by two-way ANOVA and Tukey tests. <strong>Results</strong>: Mean (±SD) values (in MPa) were as follow: Group CHX/24h - 41.8(±2.62)A; Group C/24h - 40.8(±3.35)AB; Group CHX/6 months – 36.4(±3.52)B; Group CHX/6 months - 26.1(±1.54)C. <strong>Conclusion</strong>: CHX improve the imediatte bond strength of resin-dentin and significantly lowered the loss of bond strength after 6 months water storage as seen in the control bonds.</p><p><strong>Keywords</strong></p><p>Tensile bond strength; Dentin; Total-etch adhesives; Chlorhexidine gluconate.</p>

scholarly journals Effect of different remaining dentin thickness and long term water storage on dentin bond strength

2018 ◽  
Vol 37 (4) ◽  
pp. 562-567 ◽  
Author(s):  
Shihchun TING ◽  
A.F.M. Almas CHOWDHURY ◽  
Jihao SUN ◽  
Shinichi KAKUDA ◽  
Sharanbir K. SIDHU ◽  
...  
Keyword(s):  
Bond Strength ◽  
Water Storage ◽  
Dentin Thickness

scholarly journals Long Term Water Storage Deteriorates Bonding of Composite Resin to Alumina and Zirconia Short Communication

2013 ◽  
Vol 7 (1) ◽  
pp. 123-125 ◽  
Author(s):  
T.T. Heikkinen ◽  
J.P Matinlinna ◽  
P.K. Vallittu ◽  
L.V.J. Lassila
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Composite Resin ◽  
Resin Composite ◽  
Water Storage ◽  
Particulate Composite ◽  
Resin Cement ◽  
Control Group ◽  
Set Up

Objective of this study was to evaluate the effects of long term water storage and ageing on the bond strength of resin composite cement to yttria-stabilized zirconium dioxide (zirconia) and dialuminium trioxide (alumina). Substrate specimens of alumina and zirconia were air particle abraded with dialuminium trioxide before priming and application of composite resin. Priming was made with gamma metharyloxy-trimethoxysilane or acryloxypropyl-trimethoxysilane monomer after which the intermediate dimethacrylate resin was applied and photopolymerized. This was followed by curing particulate composite resin cement (Relyx ARC) to the substrate as a resin stub. The ageing methods of the specimens (n=6) were: (1) they stored four years in 37±1ºC distilled water, (2) thermocycled 8000 times between 55±1ºC and 5±1ºC, (3) stored first in water for four years and then thermocycled. Specimens which were stored dry, were used as controls. Bonding of composite resin was measured by shear-bond strength test set-up. Both thermocycling and long-term water storage decreased significantly shear bond strength values compared to the control group (from the level of 20 MPa to 5 MPa) regardless of the used primer or the type of the substrate. Combination of four years water storage and thermocyling reduced the bond strength even more, to the level of two to three megapascals. In can be concluded that water storage and thermocycling itselves, and especially combination of water storage and thermocycling can cause considerable reduction in the bond strength of composite resin cement to alumina and zirconia.

Short- and Long-Term Bond Strength Between Resin Cement and Glass-Ceramic Using a Silane-Containing Universal Adhesive

2017 ◽  
Vol 42 (5) ◽  
pp. 514-525 ◽  
Author(s):  
F Murillo-Gómez ◽  
FA Rueggeberg ◽  
MF De Goes
Keyword(s):  
Electron Microscopy ◽  
Bond Strength ◽  
Glass Ceramic ◽  
Storage Time ◽  
Water Storage ◽  
Resin Cement ◽  
Silane Treatment ◽  
Short And Long Term ◽  
Scanning Electron

SUMMARY This study aimed to evaluate the effect of various silane-containing solutions on bonding between resin cement and glass ceramic after 24 hours and after six months of water storage. Glass-ceramic plaques (IPS e.max CAD) were sandblasted with aluminum oxide, etched with 10% hydrofluoric acid (HF), and divided into five “silane treatment” groups: RelyX Ceramic Primer (RCP), RelyX Ceramic Primer and Single Bond Plus (RCP+SB), Scotchbond Universal (SBU), Clearfil Ceramic Primer (CP), and no solution (HF-only control). Each group was divided into two “storage time” subgroups: 24 hours or six months in 37°C water. Eighteen resin cement cylinders (RelyX Ultimate) were bonded to each treatment group substrate (n=18) and then subjected to microshear testing. Failure mode was analyzed using scanning electron microscopy. Debond data were analyzed using a two-way analysis of variance and the Tukey post hoc test (α=0.05) as well as Weibull distributions. The factors “silane treatment,” “storage time,” (p&lt;0.0001), and their interaction were statistically significant (p&lt;0.0010). Group means (MPa±SD), RCP (24 hours: 27.2±3.1; six months: 18.0±4.9), and HF-only control (24 hours: 21.1±3.4; six months: 15.7±5.8) showed a reduced bond strength after six months of water storage, while RCP + SB (24 hours: 23.4±4.4; six months: 22.2±5.4), SBU (24 hours: 18.8±3.0; six months: 17.2±3.6), and CP (24 hours: 21.7±4.3; six months: 17.4±4.8) remained constant. Weibull analysis revealed that more reliable bond strengths were obtained after six months for SBU and RCP + SB. Evaluation by scanning electron microscopy revealed that all groups demonstrated hydrolytic degradation at six months of storage, but RCP + SB and SBU indicated less. Use of a separate application of silane and adhesive system improved short and long-term ceramic/resin cement bond strength.

scholarly journals Comparison of Chemical Aging and Water Immersion Time on Durability of Resin-Dentin Interface produced by an Etch-and-Rinse Adhesive

2012 ◽  
Vol 13 (4) ◽  
pp. 464-471 ◽  
Author(s):  
Sergio Brossi Botta ◽  
Adriana Bona Matos ◽  
Bruna Uglik Garbui ◽  
Andre Figueiredo Reis
Keyword(s):  
Bond Strength ◽  
Immersion Time ◽  
Water Immersion ◽  
Water Storage ◽  
Adhesive System ◽  
Fracture Pattern ◽  
Test Technique ◽  
Chemical Aging ◽  
Etch And Rinse

ABSTRACT Aim The aim of this study was to analyze and compare the influence of short-term NaOCl-storage and long-term water storage on the microtensile bond strength (μTBS) of etch-andrinse adhesive system to human dentin. Materials and methods Thirty-six third human molars were randomly divided into 6 groups (n = 6) according to the aging protocol: G1 (water, 24 hours); G2 (water, 6 months); G3 (water, 12 months); G4 (10% sodium hypochlorite – NaOCl, 1 hour); G5 (10% NaOCl, 3 hours) and G6 (10% NaOCl, 5 hours). A two-step etch-and-rinse adhesive (Adper Single Bond 2) was applied according to the manufacturers¡¦ instructions. A composite (Filtek Z250) was applied in four horizontal increments and was individually cured. Specimens were cut following the microtensile test technique, submitted to the different aging protocols, and tested in tension. The fracture pattern was observed in a stereomicroscope (40× magnification) and in a scanning electron microscope. The μTBS data were analyzed by ANOVA and Tukey's test (α = 0.05). Results The effect of storage in 10% NaOCl for 1 or 3 hours was not significantly different from that of aging in distilled water (DW) for 6 or 12 months (p > 0.05). Beams immersed in DW for 24 hours and in 10% NaOCl for 5 hours showed the highest and lowest ìTBS values respectively. Conclusion The aging protocols negatively influenced dentin bond strength. Aging specimens in 10% NaOCl for 1 or 3 hours can be an alternative method for long-term water storage (6 or 12 months) bond strength studies. Clinical significance This aging protocol allows a quick achievement of longitudinal bond strength data, so that results are available to the professionals in this area while the materials are yet present at the dental market. How to cite this article Garbui BU, Botta SB, Reis AF, Matos AB. Comparison of Chemical Aging and Water Immersion Time on Durability of Resin-Dentin Interface produced by an Etchand- Rinse Adhesive. J Contemp Dent Pract 2012;13(4):464-471.

scholarly journals Effect of chlorhexidine, green tea and egcg as therapeutic primers to increase the durability of resin-dentin bond

2016 ◽  
Vol 19 (4) ◽  
pp. 72
Author(s):  
Daphne Camara Barcellos ◽  
Beatriz Maria Fonseca ◽  
Eduardo Bresciani ◽  
Cesar Rogerio Pucci ◽  
Maria Amelia Maximo de Araujo
Keyword(s):  
Phosphoric Acid ◽  
Bond Strength ◽  
Green Tea ◽  
Water Storage ◽  
Epigallocatechin Gallate ◽  
Chlorhexidine Gluconate ◽  
Tensile Bond Strength ◽  
Single Bond ◽  
Etch And Rinse

<p><strong>Objective -</strong> This study evaluated the effect of 0.2% chlorhexidine gluconate solution (CHX), green tea and active epigallocatechin-gallate (EGCG) used as therapeutic primers on the long-term bond strength of etch-and-rinse adhesive to dentin. <strong>Material and Methods -</strong> Eighty bovine incisors were worn to expose an area of dentin, that were acid-etched (37% phosphoric acid) and rinsed.  The teeth were divided into 4 groups (n = 20): Group C (Control) - Single Bond; Group CHX - 0.2% CHX for 30s + Single Bond;  Group EGCG - active EGCG gel at 10 µM for 30 s + Single Bond;  Group GT - aqueous green tea for 30s + Single Bond. Blocks of composite were fabricated and stored for 24 h or 6  months, sectioned into beams  and  submitted  to  microtensile  tests. Results  were  analyzed  by  two-way  ANOVA  and Tukey’s test (5%).  <strong>Results -</strong> Mean (±SD) values (in MPa) were as follow: CHX (24 h) – 41.76 (±2.62); C (24 h) - 40.81 (±3.35); GT (24 h): 37.38(2.98); CHX (6 months) - 36.04 (±3.52); EGCG (24h) - 35.91 (±4.82); EGCG (6 months) - 35.75 (±4.44); GT (6 months) - 31.95 (±3.40); C (6 months): 30.05 (±1.54). <strong>Conclusion -</strong> EGCG produced resin-dentin bonds that did not change after 6 months water storage but it decreased the immediate bond strength when compared to control and chlorhexidine groups.</p><p><strong>Keywords</strong>: Tensile bond strength; Dentin; Total-etch adhesives; Chlorhexidine gluconate; Green tea.</p>

Effects of long-term water storage on the microtensile bond strength of five experimental self-etching adhesives based on surfactants rather than HEMA

2012 ◽  
Vol 17 (3) ◽  
pp. 833-839 ◽  
Author(s):  
Cesar Henrique Zanchi ◽  
Eliseu Aldrighi Münchow ◽  
Fabrício Aulo Ogliari ◽  
Rodrigo Varella de Carvalho ◽  
Stefano Chersoni ◽  
...  
Keyword(s):  
Bond Strength ◽  
Water Storage ◽  
Microtensile Bond Strength

scholarly journals Searching for universal model of amyloid signaling motifs using probabilistic context-free grammars

2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Witold Dyrka ◽  
Marlena Gąsior-Głogowska ◽  
Monika Szefczyk ◽  
Natalia Szulc
Keyword(s):  
Functional Relationship ◽  
High Sensitivity ◽  
Alternative Methods ◽  
Discriminative Power ◽  
Context Free Grammar ◽  
Protein Motifs ◽  
Functional Features ◽  
Universal Grammars ◽  
Context Free ◽  
Probabilistic Context

Abstract Background Amyloid signaling motifs are a class of protein motifs which share basic structural and functional features despite the lack of clear sequence homology. They are hard to detect in large sequence databases either with the alignment-based profile methods (due to short length and diversity) or with generic amyloid- and prion-finding tools (due to insufficient discriminative power). We propose to address the challenge with a machine learning grammatical model capable of generalizing over diverse collections of unaligned yet related motifs. Results First, we introduce and test improvements to our probabilistic context-free grammar framework for protein sequences that allow for inferring more sophisticated models achieving high sensitivity at low false positive rates. Then, we infer universal grammars for a collection of recently identified bacterial amyloid signaling motifs and demonstrate that the method is capable of generalizing by successfully searching for related motifs in fungi. The results are compared to available alternative methods. Finally, we conduct spectroscopy and staining analyses of selected peptides to verify their structural and functional relationship. Conclusions While the profile HMMs remain the method of choice for modeling homologous sets of sequences, PCFGs seem more suitable for building meta-family descriptors and extrapolating beyond the seed sample.

scholarly journals Interfacial integrity of bonded restorations with self-etching adhesives: Water storage and thermo-mechanical cycling

2012 ◽  
Vol 06 (02) ◽  
pp. 169-177
Author(s):  
Gislaine Cristine Martins ◽  
Alfonso Sánchez-Ayala ◽  
Paulo Henrique Perlatti D’Alpino ◽  
Abraham Lincoln Calixto ◽  
João Carlos Gomes ◽  
...  
Keyword(s):  
Bond Strength ◽  
Water Storage ◽  
Single Bond ◽  
Third Molars ◽  
Class V ◽  
Mean Values ◽  
Composite Restorations ◽  
Mechanical Cycling ◽  
Interfacial Gap ◽  
Made In

ABSTRACTObjectives: Objective: To evaluate the effect of thermo-mechanical cycling (TMC) on the microleakage (μL) and axial gap width (AG) of Class V bonded restorations in premolars using self-etching adhesive systems. The bond strength of composite restorations to dentin (μTBS) using the same adhesives was also evaluated in third molars after water storage: 24 h and 6 months. The research hypotheses were tested for the results of two self-etching adhesives in comparison when a conventional two-step adhesive was used: (1) the μL and AG would be lower, regardless of TMC; (2) the μTBS of self-etching adhesives would be higher, irrespective of evaluation times.Methods: Sixty Class V composite restorations were made in 30 premolars and bonded with Adper Single Bond 2 (ASB2), AdheSE (ASE), and Adper Prompt L-Pop (APL-P) (n=20). Dentin μL and AG were immediately measured for half of the sample. The other half was evaluated after TMC. Eighteen third molars were also selected and bonded using the same adhesives to test the μTBS to dentin. Specimens were evaluated after 24 h and 6 months of water storage.Results: No differences in μL and AG were found among the groups (P>.05). The μTBS mean values were: ASB2>ASE>APL-P (P<.05); only Adper Single Bond 2 presented a significantly lower μTBS after water storage (P<.05)Conclusions: The bonding approach does not influence the microleakage and interfacial gap extension. Despite the decrease in the mean values, the bond strength to dentin of the conventional, two-step adhesive remains high after 6 months of water storage. (Eur J Dent 2012;6:169-177)

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