scholarly journals Pomegranate (Punica granatum L.) gel extract as an antioxidant on the shear bond strength of a resin composite post-bleaching application with 40% hydrogen peroxide

2021 ◽  
Vol 54 (2) ◽  
pp. 87
Author(s):  
Indes Rosmalisa Suratno ◽  
Irfan Dwiandhono ◽  
Ryana Budi Purnama
Keyword(s):  
Hydrogen Peroxide ◽  
Ascorbic Acid ◽  
Bond Strength ◽  
Shear Bond Strength ◽  
Composite Resin ◽  
Resin Composite ◽  
Punica Granatum ◽  
Negative Control ◽  
Peroxide Bleaching ◽  
Bleaching Procedure

Background: Tooth discoloration can be treated with tooth bleaching. Bleaching using 40% hydrogen peroxide can reduce the shear bond strength of resin composite because there are free radicals on the tooth surface, so it can delay the restoration. The application of antioxidants can eliminate free radicals after the bleaching procedure and increase the shear bond strength of the composite resin. The common antioxidants are ascorbic acid and natural ingredients, such as pomegranate (Punica granatum L.). Purpose: To determine the effect of pomegranate extract gel on the shear bond strength of composite resin after 40% hydrogen peroxide bleaching application. Methods: This research used 32 maxillary first premolars that were divided into four groups. The samples were bleached, then the labial was prepared and antioxidant gel was applied: group P1 pomegranate gel extract of 5%, group P2 pomegranate gel extract of 10%, group K1 positive control ascorbic acid gel of 10% and group K2 as the negative control. The samples were restored with a nanohybrid composite resin. The shear bond strength was tested using a universal testing machine. The data were tested using a one-way ANOVA followed by a post-hoc LSD test. Results: The pomegranate gel extract increased the shear bond strength of the composite resin after the bleaching procedure of 40% hydrogen peroxide compared with the ascorbic acid gel group and the negative control group. The one-way ANOVA test showed a significant difference (p<0.05). The post-hoc LSD test showed significant differences between the treatment and negative control groups (p<0.05). Conclusion: The pomegranate gel extract as an antioxidant increased the shear bond strength of the composite resin restoration after the 40% hydrogen peroxide bleaching application.

scholarly journals Effect of Bleaching with Strawberry Extract and Hydrogen Peroxide on Colour Change, Surface Morphology and Micro-Shear Bond Strength of Resin Composite to Enamel Surface

2021 ◽  
Author(s):  
Rajith Radhakrishnan ◽  
Ravikumar Nesamani ◽  
Kavitha Sanjeev ◽  
Mahalaxmi Sekar
Keyword(s):  
Hydrogen Peroxide ◽  
Bond Strength ◽  
Shear Bond Strength ◽  
Resin Composite ◽  
Negative Control ◽  
Enamel Surface ◽  
P Value ◽  
Group 2 ◽  
Colour Coordinates ◽  
Group 1

Introduction: The search to replace the chemical bleaching agent namely the Hydrogen Peroxide (HP) with a natural substance to whiten the discoloured tooth is a need of the hour, due to the severe roughing and compromised bonding of resin composite to enamel surface by this agent. Aim: To evaluate and compare the colour and surface changes in enamel surface, and the micro-shear bond strength of resin composite to enamel following bleaching with 35% HP and 2% Strawberry Extract (SE). Materials and Methods: In this in-vitro study, 30 bovine maxillary central incisors were decoronated and allocated randomly to two groups: group 1 (negative control) (n=15) and group 2 (experimental) (n=15). To evaluate the bleaching efficacy, group 2 specimens were experimentally stained with tea. Baseline colour coordinates (pre-bleach values) (L*, a*, b*) (∆E) were recorded. The crowns were sectioned to obtain four equal parts to obtain 60 specimens and these were allotted randomly to 4 subgroups a, b, c, d (n=15 each) based on the bleaching protocol. Subgroup a, Hydrogen Peroxide (HP). subgroup b, Strawberry Extract (SE); subgroup c, HP+SE (HPS); subgroup d, HP/P (HP/ Proanthocyanidin). Following bleaching, colour coordinates (post-bleach values) (L*, a*, b*) (∆E) were measured as mentioned before. Qualitative analysis of the surface (n=2) for each group was performed using scanning electron microscopy. Micro-shear bond strength of resin composite to the treated specimens (n=13) was determined using universal testing machine at a crosshead speed of 1 mm/min. Kruskal-Wallis one-way Analysis of Variance (ANOVA) was used to calculate the p-value and Post-Hoc Tukey Honest significant Test (HSD) was used to identify the significant groups, p-value (<0.05). Results: All the post-bleach specimens showed significantly higher mean ∆E (more whiter) values compared to their respective pre-bleach specimens (baseline values) (p-value -<0.05). Among the post-bleach groups, highest ∆E values (more whiter) were observed in subgroup 2c(HPS) (p-value=0.029). Similarly minimal morphological surface irregularities were observed in HPS. Group 1 (negative control) had the highest micro-shear bond strength compared to the experimental groups (group 2). Significantly, higher micro-shear bond strength was observed in subgroups 2b,c,d (SE, HPS, HPP) compared to subgroup 2a(HP) (p-value <0.001). Conclusion: SE alone or in combination with HP is an efficient and effective dental bleaching agent.

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 Impact of Intracoronal Dentin Treatment Prior to Bleaching on Bond Strength of Restorative Materials

2014 ◽  
Vol 25 (6) ◽  
pp. 519-523 ◽  
Author(s):  
Erica Moreno Zanconato-Carvalho ◽  
João Felipe Bruniera ◽  
Natália Spadini de Faria ◽  
Vivian Colucci ◽  
Danielle Cristine Messias
Keyword(s):  
Phosphoric Acid ◽  
Bond Strength ◽  
Surface Treatment ◽  
Shear Bond Strength ◽  
Composite Resin ◽  
Er:Yag Laser ◽  
Composite Resins ◽  
Bleaching Procedure ◽  
Significant Difference ◽  
Restorative Materials

Surface treatment of dentin before the bleaching procedure may affect its permeability and influence the bond strength of restorative materials. This study evaluated the influence of surface treatment before the bleaching on shear bond strength (SBT) of restorative materials to intracoronal dentin. Dentin slabs were subjected to surface treatment: no bleaching (control - CON), no surface treatment + bleaching (HP), 37% phosphoric acid + bleaching (PA) and Er:YAG laser + bleaching (L). After the bleaching procedure, specimens (n=10) were restored with: microhybrid composite resin (MH), flowable composite resin (F), and resin-modified glass-ionomer cement (RMGIC). The shear test was carried out. ANOVA and Tukey's test (α=0.05) showed significant difference for surface treatment and restorative materials (p<0.05). CON presented higher STB and was statistically different from HP (p<0.05). PA and L showed intermediate values and were statistically similar to CON and HP (p>0.05). STB for MH and F were higher than RMGIC (p<0.05), and did not differ from each other (p>0.05). The surface treatments with phosphoric acid and Er:YAG laser before the bleaching procedure provided shear bond strength at the same level of unbleached dentin and the composite resins presented superior bond strength to the intracoronal dentin.

scholarly journals Aplikasi klorheksidin glukonat 2%pada dentin tidak mempengaruhi kuat rekat geserkomposit resinyangmenggunakansistem adesif self etch (2% Chlorhexidine gluconate application on dentine does not affect bond strength of resin composite using self etch adhesive system)

2014 ◽  
Vol 13 (1) ◽  
pp. 7
Author(s):  
Dewi Puspitasari ◽  
Andi Soufyan ◽  
Ellyza Herda
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Composite Resin ◽  
Resin Composite ◽  
Testing Machine ◽  
Adhesive System ◽  
Chlorhexidine Gluconate ◽  
Adhesive Systems ◽  
Group I ◽  
Self Etch

Composite resin is a widely used aesthetic restoration. The restoration can fail due to secondary caries. Chlorhexidinegluconate 2% is used as a cavity disinfectant to eliminate microorganisms on the prepared cavity and to prevent thesecondary caries. The purpose of this study was to analyze the effect of chlorhexidine gluconate 2% to the bondstrength of composite resin with self etch system adhesive on dentine. Sixteen specimens of buccal dentine of premolarscrown are divided into 2 different groups. Group I: Clearfil SE Bond self-etch primer was applied for 20 seconds,Clearfil SE Bond bonding was applied for 5 seconds and polymerized for 10 seconds. Composite resin was constructedincrementally and polymerized for 20 seconds. Group II: prior to self etch primer application as in group I,chlorhexidine gluconate 2% was applied for 15 seconds. Shear bond strength was tested using Testing machine andanalyzed with unpaired T test. The highest shear bond strength was obtained by applying chlorhexidine gluconate 2%.The study concludes that chlorhexidine gluconate 2% application to dentine did not affect significantly to the bondstrength composite resin using self etch adhesive systems.

scholarly journals Efek Gel Ekstrak Kulit Buah Manggis (Garcinia Mangostana) pada Perlekatan Komposit pasca In-Office Bleaching

2015 ◽  
Vol 1 (1) ◽  
pp. 32
Author(s):  
Farah Amiria ◽  
Harwoko Harwoko ◽  
A. Haris Budi Widodo
Keyword(s):  
Ascorbic Acid ◽  
Bond Strength ◽  
Shear Bond Strength ◽  
Positive Control ◽  
Negative Control ◽  
Positive Control Group ◽  
Control Group ◽  
Garcinia Mangostana ◽  
Anti Oxidant ◽  
Resin Bonding

Hidrogen peroksida pada perawatan in-office bleaching meninggalkan residu yang dapat menghambat polimerisasi pada sistem resin bonding. Asam askorbat 10% sebagai antioksidan dapat mengeliminasi residu peroksida sebelum proses penumpatan. Kulit buah manggis (Garcinia mangostana) memiliki aktivitas antioksidan yang berpotensi untukmenggantikan peran asam askorbat. Penelitian ini bertujuan untuk membuktikan efek gel ekstrak kulit buah manggis dalam memperbaiki perlekatan komposit pada gigi pasca in-office bleaching. Penelitian ini merupakan penelitian eksperimental laboratorium. Sebanyak 25 gigi premolar pertama rahang atas dilakukan in-office bleaching danselanjutnya dibagi menjadi 5 kelompok terdiri dari kontrol negatif (tanpa agen antioksidan), kontrol positif (asam askorbat 10%), dan kelompok perlakuan gel ekstrak kulit buah manggis 10%, 20%, dan 40%. Perlekatan komposit ditentukan dengan uji geser, dilanjutkan pengamatan mikrostruktur permukaan email. Hasil penelitian menunjukkan nilai perlekatan komposit pada kelompok kontrol negatif dan kontrol positif berturut-turut sebesar 25,82±2,88 Mpa dan 37,68±1,06 Mpa. Pada kelompok perlakuan gel ekstrak kulit manggis 10%, 20%, dan 40% diperoleh nilai perlekatan berturut-turut sebesar26,54±2,68; 32,64±2,33; dan 57,34±1,51 Mpa. Nilai perlekatan komposit pada pemberian gel ekstrak kulit manggis 20% dan 40% berbeda signifikan dibandingkan dengan kontrol negatif maupun kontrol positif (p<0,05). Kenaikan konsentrasi gel ekstrak kulit manggis memberikan peningkatan jumlah fraktur email. Gel ekstrak kulit manggis 20% dan 40% dapat memperbaiki perlekatan komposit sehingga berpotensi sebagai agen antioksidan pada gigi pasca in-office bleaching. Effect of Mangosteen Gel on Shear Bond Strength Of Composite Post In-Office Bleaching. The residual peroxide after in-office bleaching inhibits the polymerization of the resin bonding systems. Ascorbic acid (10%) as anti-oxidant agent has a potential to remove the residual peroxide before restoration procedure. Mangosteen extracthas an anti-oxidant potential that can be used to remove the residual peroxide. The aim of the study is to prove the effect of mangosteen extract gel to improve shear bond strength of composite post in-office bleaching. The experimental laboratory design was implemented to this research. The study was carried out on 25 maxillary first premolars thathad been applied in-office bleaching procedure. The teeth were divided into five groups as follow: negative-control group (without anti-oxidant agent), positive-control group (10% ascorbic acid), and the treatment groups (10%, 20%, and 40% mangosteen extract gel). Shear bond strength of the specimens was tested and followed by microstructuretesting on email. The results show that negative-control and positive-control group scores were 25,82±2,88 Mpa and 37,68±1,06 Mpa, followed by the scores of 10%, 20%, and 40% mangosteen extract gel groups which were 26,54±2,68; 32,64±2,33; and 57,34±1,51 Mpa respectively. Significant higher shear bond strength values were observed in 20% and 40% mangosteen extract gel groups compared to the negative-control and positive-control group (p<0,05). The increasing concentration of mangosteen extract gel provided increasing number of email fractures. Mangosteen extract gel 20% and 40% improve the shear bond strength of composite, confirming its potential as an antioxidant agent for the teeth post in-office bleaching.

Comparison of the Effect of Hydrogel and a Solution of Sodium Ascorbate on Dentincomposite Bond Strength After Bleaching

2008 ◽  
Vol 9 (2) ◽  
pp. 105-112 ◽  
Author(s):  
Soodabeh Kimyai ◽  
Hadi Valizadeh
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Resin Composite ◽  
Sodium Ascorbate ◽  
Carbamide Peroxide ◽  
Treatment Groups ◽  
Bleaching Procedure ◽  
Bond Strengths ◽  
Composite Shear ◽  
Group 1

Abstract Aim The aim of this study was to compare the effects of solution and different sodium ascorbate hydrogels on dentin-resin composite shear bond strength subsequent to a bleaching procedure with 10% carbamide peroxide. Methods and Materials Sixty buccal dentin surfaces obtained from intact human third molars were randomly divided into five groups (n=12). Dentin surfaces received different treatments: (1) no treatment; (2) bleaching (10% carbamide peroxide gel); (3) bleaching + 10% sodium ascorbate solution; (4) bleaching + 10% sodium ascorbate hydrogel, and (5) bleaching + 20% sodium ascorbate hydrogel. Dentin surfaces were bonded with Single Bond™ and restored with a composite (Z100). The samples were tested for shear bond strengths. Data was analyzed using analysis of variance (ANOVA) and Tukey tests. Results Significantly higher bond strengths were observed subsequent to treatment with hydrogel and solution forms of sodium ascorbate (p<0.05). No significant differences were demonstrated between different forms of sodium ascorbate preparations. In addition, no significant differences were observed among groups with antioxidant treatment (Groups 3, 4, and 5) and Group 1 (no treatment). Conclusion Reduced bond strength to bleached dentin can be amended by the use of sodium ascorbate as an antioxidant. Clinical Significance Both hydrogel and solution forms of sodium ascorbate can significantly improve the reduced bond strength of resin composite to dentin subsequent to a bleaching procedure with 10% carbamide peroxide. Citation Kimyai S, Valizadeh H. Comparison of the Effect of Hydrogel and a Solution of Sodium Ascorbate on Dentin-composite Bond Strength After Bleaching. J Contemp Dent Pract 2008 February;(9)2:105-112.

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.

scholarly journals The difference between porcelain and composite resin shear bond strength in the administration of 4% and 19.81% silane

2019 ◽  
Vol 52 (1) ◽  
pp. 27
Author(s):  
Ira Widjiastuti ◽  
Dwina Rahmawati Junaedi ◽  
Ruslan Effendy
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Composite Resin ◽  
Resin Composite ◽  
Repair Process ◽  
Direct Repair ◽  
Significant Difference ◽  
Group A ◽  
The Difference ◽  
Group B

Background: Damage to porcelain restorations such as fractures requires a repair that can be performed either directly or indirectly. Direct repair involves directly performing restoration of fractured porcelain with a composite resin application. This technique has more advantages than indirect repair because it requires no laboratory work and can be completed during a single visit. Silane, on the other hand, has been widely used and is reported to increase porcelain and composite resin attachments during the direct repair process. Purpose: This study aimed to determine the differences in shear bond strength between porcelain and composite resin during the administering of 4% and 19.81% silane. Methods: 27 porcelain samples were divided into three groups, namely: Group A - 4% silane, Group B - 19.81% silane and Group C - no silane, prior to the application of composite resin. Each sample was tested for shear bond strength by means of Autograph and fracture analysis performed through stereomicroscope and scanning electron microscope tests. Data analysis was subsequently performed using an ANOVA test. Results: There was a significant difference between the three groups with p=0.000 (p<0.005). The lowest bond strength was found in the group without silane, while the highest was in the group with 4% silane (p<0.005). Conclusion: The use of 4% silane can produce the highest shear bond strength of porcelain and resin composite.

scholarly journals The effect of tooth bleaching on the shear bond strength of orthodontic brackets using self-etching primer systems

2013 ◽  
Vol 07 (01) ◽  
pp. 055-060 ◽  
Author(s):  
Mehmet Akin ◽  
Sertac Aksakalli ◽  
Faruk Ayhan Basciftci ◽  
Abdullah Demir
Keyword(s):  
Hydrogen Peroxide ◽  
Bond Strength ◽  
Shear Bond Strength ◽  
Orthodontic Brackets ◽  
Control Group ◽  
Carbamide Peroxide ◽  
Peroxide Bleaching ◽  
Group 3 ◽  
Group 2 ◽  
Group 1

ABSTRACTObjective: The purpose of this study was to determine the effect of 10% carbamide peroxide and 38% hydrogen peroxide bleaching agents on the shear bond strength of orthodontic brackets using self-etching primer systems.Methods: Forty five freshly extracted human premolar teeth were randomly divided into 3 groups of 15 teeth each: control (group 1), 10% carbamide peroxide at-home bleached (group 2), and 38% hydrogen peroxide in-office bleached (group 3). Three weeks later, all brackets were bonded using a self-etching primer system. The shear bond strength of these brackets was measured and recorded in MPa. Adhesive remnant index (ARI) scores were determined after the brackets failed. Data were analyzed using Kruskal- Wallis test, pairwise comparisons were made using the Mann-Whitney U test and ARI scores were analyzed using a chi-square test at a significance level of P<.05.Results: The shear bond strengths of group 1 (mean: 17.7 ± 9.7 MPa) were significantly higher (P<.05) than those of group 3 (mean: 9.9 ± 5.4 MPa). No significant differences were found between group 2 (mean: 12.3 ± 4.7) and either group 1 or group 3 (P>.05). ARI scores did not differ significantly among the 3 groups.Conclusions: The use of 10% carbamide peroxide bleaching does not significantly reduce shear bond strength values. In contrast, use of 38% hydrogen peroxide bleaching significantly reduces these values. (Eur J Dent 2013;7:55-60)

scholarly journals EFFECT OF 2% CHLORHEXIDINE GLUCONATE ON THE DEGRADATION OF RESINCOMPOSITE–DENTIN BOND STRENGTH WHEN USING SELF-ETCH ADHESIVE SYSTEMS

2018 ◽  
Vol 9 ◽  
pp. 45 ◽  
Author(s):  
Dewi Puspitasari ◽  
Ellyza Herda ◽  
Andi Soufyan
Keyword(s):  
Treatment Group ◽  
Bond Strength ◽  
Shear Bond Strength ◽  
Composite Resin ◽  
Resin Composite ◽  
Testing Machine ◽  
Treated Group ◽  
Chlorhexidine Gluconate ◽  
Untreated Group ◽  
Self Etch

Objective: The purpose of this study was to analyze the effect of 2% chlorhexidine gluconate (CHX) on the degradation of composite resin–dentin bond strength when using self-etch adhesive systems.Methods: CHX (2%) was applied before application of two-step self-etch (TSC) and one-step self-etch (OSC) adhesive. Resin composite was applied incrementally. Specimens from the degradation treatment group were immersed in 10% NaOCl for 1 h. Shear bond strength was tested with a universal testing machine and analyzed using one-way ANOVA and Dunnett’s T3 post-hoc test. The composite resin–dentin bonds were observed using scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS).Results: In the treatment group without 10% NaOCl, shear bond strength values were higher in the 2% CHX-treated group (TSC 11.67±1.76 MPa and OSC 10.19±1.44 MPa) than in the untreated group (TSC 10.93±1.31MPa and OSC 9.97±1.41 MPa), although this difference was not statistically significant. In samples exposed to10% NaOCl, shear bond strength values were higher in the 2% CHX-treated group (TSC 11.14±1.22 MPa and OSC 9.95±1.21 MPa) than in the untreated group (TSC 10.08±0.45 MPa and OSC 8.62±0.85 MPa), although this difference was not statistically significant. The SEM of samples from the 2% CHX-treated group showed less degradation than samples from the untreated group did.Conclusion: Application of 2% CHX may decrease the degradation of the resin composite-dentin bond.

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