Comparative Evaluation of Different Antioxidants on Reversal of Microtensile Bond Strength of Composite Resin in Endodontically Treated Tooth Surface
Introduction: The use of Sodium Hypochlorite (NaOCl) as an endodontic irrigant changes the properties of dentine and lowers the bond strength of resin cements to dentine. But it can be reversed by the use of antioxidants. Aim: To evaluate the effect of different antioxidants for restoring adhes...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
JCDR Research and Publications Private Limited
2021-05-01
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| Series: | Journal of Clinical and Diagnostic Research |
| Subjects: | |
| Online Access: | https://www.jcdr.net/articles/PDF/14936/46654_CE[Ra1]_F(SHU)_PF1(MG_SHU)_PN(KM).pdf |
| Summary: | Introduction: The use of Sodium Hypochlorite (NaOCl) as an
endodontic irrigant changes the properties of dentine and lowers
the bond strength of resin cements to dentine. But it can be
reversed by the use of antioxidants.
Aim: To evaluate the effect of different antioxidants for
restoring adhesion potential/reversal of microtensile bond
strength of dentin of the pulp chamber treated with NaOCl and
Ethylenediaminetetracetic Acid (EDTA).
Materials and Methods: It was a laboratory based experimentalinvitro study in which 40 freshly extracted human incisors were
selected and cut to expose the pulp chamber dentin. The
specimens were distributed into five groups: Group I samples
were irrigated with 5.25% NaOCl for 30 minutes followed by 17%
EDTA for 3 minutes and final rinse was done with 5.25% NaOCl
(Positive control). Group II samples were treated with distilled
water only (Negative control). In Group III, samples were treated
same as in group I followed by 10% Sodium Ascorbate (SA)
for 10 minute. Samples of group IV samples were also treated
as in group I followed by application of 5% solution of Alpha
tocopherol with for 10 minutes. Group V samples were treated
same as in group I followed by rinse with 5% solution of Sodium
Thiosulphate (Na2
S2
O3
) for 10 minutes. Composite resin build
up was performed and interface was tested by using Universal
testing machine for Microtensile bond strength. The resulting
data was analysed by one-way Analysis of Variance (ANOVA) and
Mann-Whitney U test (p<0.05).
Results: The results demonstrated that irrigation with 5.25%
NaOCl and 17% EDTA produce significant (p<0.05) reduction in
resin dentin bond strength but this can be reversed by application
of 5% Na2
S2
O3
. Highest bond strength was observed in group V
(22.38±0.84) and lowest for group I (15.38±1.22).
Conclusion: Dentin bond strength was significantly reduced
when bonding was performed immediately after use of NaOCl.
Use of antioxidants after final irrigation with NaOCl can be
recommended for better bonding of composite resin. |
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| ISSN: | 2249-782X 0973-709X |