Effect Of Grape Seed Extract On The Bond Strength And Adhesion Durability Of Universal Adhesive To Dentin

Abstract Aim: The aim of this study was to compare the reversal of shear bond strength of composite to bleached enamel immediately after bleaching followed by application of various antioxidant solutions. Material and Methods: Seventy central incisors were divided into seven groups. Groups I and II served as unbleached and bleached controls respectively. Groups III, IV, V, VI and VII served as the experimental groups and were subjected to 37.5% hydrogen peroxide bleaching followed by 10 min application of 10% sodium ascorbate, 25% alpha-tocopherol, 6.5% grape seed extract, 5% lycopene and 5% green tea extract respectively. Following composite bonding, shear bond strength was determined and the results were analyzed using ANOVA followed by Post Hoc Multiple Comparisons test. Results: The bond strength values for Group I (positive control) were maximum and significantly different than all the other groups except Grape seed extract group (Group V). When compared to Group II (bleached control), all the groups showed significantly higher bond strength. Significant difference in the bond strength values were seen between Group III (10% sodium ascorbate) and Group V. Also values for Group V were significantly different from Group VI (5% lycopene). All the other values showed insignificantly different results. Conclusion: All the antioxidant solutions improved the shear bond strength values after bleaching but only Grape seed extract application reversed the values to the non bleached levels. Lycopene was least effective. Other antioxidants showed comparable results.

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The effect of 10% alpha-tocopherol solution and 5% grape seed extract on the microhardness and shear bond strength to bleached dentin

Dental Research Journal ◽

10.4103/1735-3327.321865 ◽

2021 ◽

Vol 18 (1) ◽

pp. 54

Author(s):

Manvi Srivastava ◽

Ramakrishna Yeluri

Keyword(s):

Bond Strength ◽

Shear Bond Strength ◽

Grape Seed Extract ◽

Grape Seed ◽

Seed Extract ◽

Alpha Tocopherol

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Effectiveness of grape seed extract-based intracanal dressings against Enterococcus Faecalis and its influence on dentin microhardness and bond strength of filling material

Bioscience Journal ◽

10.14393/bj-v36n6a2020-54066 ◽

2020 ◽

Vol 36 (6) ◽

Author(s):

Matheus Albino Souza ◽

Daniel De Lima Dalla Lana ◽

Amália Pletsch ◽

Huriel Scartazzini Palhano ◽

Juliane Bervian ◽

...

Keyword(s):

Antimicrobial Activity ◽

Bond Strength ◽

Enterococcus Faecalis ◽

Storage Period ◽

Grape Seed Extract ◽

Grape Seed ◽

Seed Extract ◽

Filling Material ◽

Bacterial Reduction ◽

Significant Difference

The aim of this study was to evaluate the effectiveness of grape seed extract (GSE)-based intracanal dressings against Enterococcus faecalis (E. faecalis) and its influence on dentin microhardness and bond strength of the filling material. The root canals of 126 human teeth were distributed into three test groups: antimicrobial activity (60 teeth), dentin microhardness (30 teeth) and bond strength (36 teeth). In all three groups, specimens were subdivided into six groups, according to intracanal dressing protocols: G1 – distilled water (DW); G2 – 2% chlorhexidine gel (CHX); G3 – calcium hydroxide (Ca[OH]2)+DW; G4 – GSE+DW; G5 – Ca(OH)2+CHX; G6 – GSE+CHX. The counting of colony-forming units (CFUs), the Vickers microhardness tester and the push-out test were performed to evaluate the antimicrobial activity, dentin microhardness and bond strength, respectively. Specific statistical analysis was performed for each evaluation (α=5%). The greatest bacterial reduction was observed in G5 (Ca[OH]2+CHX) and G6 (GSE+CHX) (p<0.05). There was no statistically significant difference among groups in the dentin microhardness evaluation (p<0.05). The highest bond strength in the immediate evaluation was observed in G4 (GSE+DW) and G6 (GSE+CHX), whereas the highest bond strength after 12 months of storage was observed in G2 (CHX), G3 (Ca[OH]2+DW), G4 (GSE+DW), and G6 (GSE+CHX) (p<0.05). After the storage period, bond strength was increased in G2 (CHX) and G3 (Ca[OH]2+DW), and remained unchanged in G4 (GSE+DW) and G6 (GSE+CHX) (p<0.05). GSE-based intracanal dressings have antimicrobial potential against E. faecalis, have no influence in dentin microhardness and preserve the high bond strength of filling materials for root dentin over time.

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