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The Effect of Aloe Vera, Pomegranate Peel, Grape Seed Extract, Green Tea, and Sodium Ascorbate as Antioxidants on the Shear Bond Strength of Composite Resin to Home-bleached Enamel.

Sharafeddin F, Farshad F - J Dent (Shiraz) (2015)

Bottom Line: Sixty extracted intact human incisors were embedded in cylindrical acrylic resin blocks (2.5×1.5 cm), with the coronal portion left out of the block.After bleaching the labial enamel surface with 15% carbamide peroxide, they were randomly divided into 6 groups (n=10).No significant difference existed between the control and experimental groups.

View Article: PubMed Central - PubMed

Affiliation: Biomaterial Research Center, Dept. of Operative Dentistry, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.

ABSTRACT

Statement of the problem: Immediate application of bonding agent to home- bleached enamel leads to significant reduction in the shear bond strength of composite resin due to the residual oxygen. Different antioxidant agents may overcome this problem.

Purpose: This study aimed to assess the effect of different antioxidants on the shear bond strength of composite resin to home-bleached.

Materials and method: Sixty extracted intact human incisors were embedded in cylindrical acrylic resin blocks (2.5×1.5 cm), with the coronal portion left out of the block. After bleaching the labial enamel surface with 15% carbamide peroxide, they were randomly divided into 6 groups (n=10). Before performing composite resin restoration by using a cylindrical Teflon mold (5×2 mm), each group was treated with one of the following antioxidants: 10% sodium ascorbate solution, 10% pomegranate peel solution, 10% grape seed extract, 5% green tea extract, and aloe vera leaf gel. One group was left untreated as the control. The shear bond strength of samples was tested under a universal testing machine (ZwickRoell Z020). The shear bond strength data were analyzed by one-way ANOVA and post hoc Tukey tests (p< 0.05).

Results: No significant difference existed between the control and experimental groups. Moreover, there was no statistically significant difference between the effects of different antioxidants on the shear bond strength of bleached enamel.

Conclusion: Different antioxidants used in this study had the same effect on the shear bond strength of home-bleached enamel, and none of them caused a statistically significant increase in its value.

No MeSH data available.


Related in: MedlinePlus

The samples under the SBS test in the universal testing machine
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Figure 1: The samples under the SBS test in the universal testing machine

Mentions: By solving a 10-mg sodium ascorbate pill (Vitamin C; DR Muller, Germany), a pomegranate peel extract pill (Amin Pharma; Iran), a grape seed extract pill (Enerex; Canada) and a 5-mg green tea extract pill (CAMGREEN; Giah Essence, Iran) in 100 mL of distilled water, 4 solutions were prepared. The resultant solutions were 10% sodium ascorbate solution, 10% pomegranate peel extract solution, 10% grape seed extract solution, and 5% green tea solution, respectively. Aloe vera gel was prepared from the aloe vera inner leaf. The study groups were named alphabetically from A to F. In group A (control group), immediately after bleaching, composite resin restorative procedure was carried out. In groups B, C, D, and E immediately after bleaching, a solution of 10% sodium ascorbate, 10% pomegranate peel, 10% grape seed extract, 5% green tea, and aloe vera leaf gel were respectively applied on the bleached enamel surface for 10 minutes. Then the samples were rinsed with water for 30 seconds and dried. Finally, composite resin build-up procedure was done. All the bleached surfaces were etched by using 37% phosphoric acid gel for 15 seconds (Total Etching Gel; Ivoclar Vivadent, Schaan, Liechtenstein). Then they were rinsed with water spray for 15 seconds, Adper Single Bond (3M ESPE; Dental Products, St Paul, MN, USA) was applied, and light-cured by an LED unit (Demi Plus; Kerr, Switzerland) for 20 seconds at a light intensity of 1200 W/cm2. Finally, the restoration procedure was done with composite resin (Filtek Z350; 3M Dental Products) by using a Teflon mold (5×2 mm). They were light-cured for 20 seconds by the same LED light-curing unit. All the samples were immersed in distilled water at room temperature for 24 hours. For measuring the shear bond strength, the samples were placed in a universal testing machine (ZwickRoell Testing Machine Z020; Germany) with a blade-shaped tip, and the force was applied to the composite resin‒enamel interface at a crosshead speed of 0.5 mm/min (Figure 1).


The Effect of Aloe Vera, Pomegranate Peel, Grape Seed Extract, Green Tea, and Sodium Ascorbate as Antioxidants on the Shear Bond Strength of Composite Resin to Home-bleached Enamel.

Sharafeddin F, Farshad F - J Dent (Shiraz) (2015)

The samples under the SBS test in the universal testing machine
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4664025&req=5

Figure 1: The samples under the SBS test in the universal testing machine
Mentions: By solving a 10-mg sodium ascorbate pill (Vitamin C; DR Muller, Germany), a pomegranate peel extract pill (Amin Pharma; Iran), a grape seed extract pill (Enerex; Canada) and a 5-mg green tea extract pill (CAMGREEN; Giah Essence, Iran) in 100 mL of distilled water, 4 solutions were prepared. The resultant solutions were 10% sodium ascorbate solution, 10% pomegranate peel extract solution, 10% grape seed extract solution, and 5% green tea solution, respectively. Aloe vera gel was prepared from the aloe vera inner leaf. The study groups were named alphabetically from A to F. In group A (control group), immediately after bleaching, composite resin restorative procedure was carried out. In groups B, C, D, and E immediately after bleaching, a solution of 10% sodium ascorbate, 10% pomegranate peel, 10% grape seed extract, 5% green tea, and aloe vera leaf gel were respectively applied on the bleached enamel surface for 10 minutes. Then the samples were rinsed with water for 30 seconds and dried. Finally, composite resin build-up procedure was done. All the bleached surfaces were etched by using 37% phosphoric acid gel for 15 seconds (Total Etching Gel; Ivoclar Vivadent, Schaan, Liechtenstein). Then they were rinsed with water spray for 15 seconds, Adper Single Bond (3M ESPE; Dental Products, St Paul, MN, USA) was applied, and light-cured by an LED unit (Demi Plus; Kerr, Switzerland) for 20 seconds at a light intensity of 1200 W/cm2. Finally, the restoration procedure was done with composite resin (Filtek Z350; 3M Dental Products) by using a Teflon mold (5×2 mm). They were light-cured for 20 seconds by the same LED light-curing unit. All the samples were immersed in distilled water at room temperature for 24 hours. For measuring the shear bond strength, the samples were placed in a universal testing machine (ZwickRoell Testing Machine Z020; Germany) with a blade-shaped tip, and the force was applied to the composite resin‒enamel interface at a crosshead speed of 0.5 mm/min (Figure 1).

Bottom Line: Sixty extracted intact human incisors were embedded in cylindrical acrylic resin blocks (2.5×1.5 cm), with the coronal portion left out of the block.After bleaching the labial enamel surface with 15% carbamide peroxide, they were randomly divided into 6 groups (n=10).No significant difference existed between the control and experimental groups.

View Article: PubMed Central - PubMed

Affiliation: Biomaterial Research Center, Dept. of Operative Dentistry, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.

ABSTRACT

Statement of the problem: Immediate application of bonding agent to home- bleached enamel leads to significant reduction in the shear bond strength of composite resin due to the residual oxygen. Different antioxidant agents may overcome this problem.

Purpose: This study aimed to assess the effect of different antioxidants on the shear bond strength of composite resin to home-bleached.

Materials and method: Sixty extracted intact human incisors were embedded in cylindrical acrylic resin blocks (2.5×1.5 cm), with the coronal portion left out of the block. After bleaching the labial enamel surface with 15% carbamide peroxide, they were randomly divided into 6 groups (n=10). Before performing composite resin restoration by using a cylindrical Teflon mold (5×2 mm), each group was treated with one of the following antioxidants: 10% sodium ascorbate solution, 10% pomegranate peel solution, 10% grape seed extract, 5% green tea extract, and aloe vera leaf gel. One group was left untreated as the control. The shear bond strength of samples was tested under a universal testing machine (ZwickRoell Z020). The shear bond strength data were analyzed by one-way ANOVA and post hoc Tukey tests (p< 0.05).

Results: No significant difference existed between the control and experimental groups. Moreover, there was no statistically significant difference between the effects of different antioxidants on the shear bond strength of bleached enamel.

Conclusion: Different antioxidants used in this study had the same effect on the shear bond strength of home-bleached enamel, and none of them caused a statistically significant increase in its value.

No MeSH data available.


Related in: MedlinePlus