AN IN-VITRO COMPARATIVE STUDY ON THE BOND STRENGTH OF ROOT DENTIN AFTER TREATMENT WITH TWO DIFFERENT COLLAGEN CROSS LINKING AGENTS

The aim of the studyis to evaluate whether the two different collagen- cross linking agents (Alpha-tocopherol and Punicalagin) may help to reverse the reduced bond strength of root dentin after treatment with sodium hypochlorite. Group 1: root canals were irrigated with 5.25% NaOCl followed by 5% Alpha-tocopherol for 10 minutes. Group 2: root canals were irrigated with 5.25% NaOCl followed by 5% punicalagin for 10 minutes. Group 3: root canals were irrigated using 5.25% NaOCl + EDTA solution (positive control). All the canals were then obturated with Gutta Percha Points(Dentsply) with Resin cement (AH26, Dentsply) as root canal sealer and allowed it to be cured undisturbed for 5minutes, stored for one day in water, and then cross sectioned into three slabs of 2-mm thickness that were prepared and tested for microtensile bond strength.The results demonstrated that 5.25% NaOCl caused significant reduction (P<0.05) in the bond strength, but this can be reversed by 5% Alpha-tocopherol significantly more than the 5% Punicalagin.