Effect of Tannic Acid and Quercetin Antioxidants on Bond Strength of Resin Cement to Dentin after Internal Bleaching

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  • Zahra Fattah
  • Fereshteh Shafiei
  • Farideh Rajabi


Purpose: To evaluate the influence of tannic acid and quercetin on the immediate microshear bond strength (μSBS) of two resin cements to dentin after internal bleaching. Materials and Methods: The access cavity in eighty extracted maxillary incisors was internally bleached except the control groups. The labial surfaces were ground to expose a flat dentin surface. The specimens were randomly divided into eight groups (n=10) as follows: 1) Control/Dou; Doulink without bleaching, 2) Bl/Dou; Bleaching+Doulink, 3) Bl+Ta/ Dou; Bleaching+Tannic acid+Doulink, 4) Bl+Qu/Dou;Bleaching+Quercetin+Doulink, 5) Control/PSA; Panavia SA without bleaching, 6) Bl/PSA;Bleaching+Panavia SA, 7) Bl+Ta/ PSA; Bleaching+Tannic acid+Panavia SA, 8) Bl+Qu+PSA; Bleaching+Quercetin+Panavia
SA. After 24 hours, the μSBS of the specimens was tested and the obtained data were analyzed with two-way ANOVA and Tamhane test (p<0.05). Results: The µSBS of Doulink groups were higher than the PSA groups (p<0.001). The µSBS of Bl+Ta/Dou and Bl+Qu/ Dou groups did not differ from Bl/Dou (p>0.05). The µSBS of Bl+Ta/PSA group was statistically significantly higher than the Bl/PSA group (p<0.001). There was no significant difference between µSBS of Bl+Qu/PSA and Bl/PSA groups (p=0.39). Conclusions: TA partially reversed the negative influence of internal bleaching on the µSBS of Panavia SA while quercetin did not increase the bond strength of both resin cements.
Resin Cement
Internal Bleaching
Microshear Bond Strength