The Effect of Green Tea Irrigant on the Cleanliness of Root Dentin and on the Adaptability of Self Etching Adhesives

Abstract

The aim of this study was to evaluate the effect of green tea irrigant on the cleanlinessof root dentin and on the adaptability of RealSeal self etching resin sealer comparing it toAH Plus resin sealer. Materials & methods: One hundred and sixty extracted teeth were divided into 3 groups for the evaluation of canal cleanliness, adaptability, push out bond strength and mode of failure. Teeth were decoronated, instrumented, and then divided into four different sub groups according to irrigation protocols . Forty samples were evaluated for canal cleanliness. 120 samples were obturated using lateral compaction technique. Then forty samples of them were divided into two subdivisions for the evaluation of adaptability using SEM (5 samples using each sealer) . The other eighty samples were divided into two subdivisions for the evaluation of push out bond strength and failure mode analysis (10 samples using each sealer). Data were subjected to statistical analysis. Results: Green tea showed the maximum mean value of remaining root canal debris, followed by NaOCl / green tea, followed by EDTA/ green tea and then EDTA/NaOCl with a statistically significant difference between all subgroups, there was a statistically significant difference in canal cleanliness between root levels where the best cleanliness value was seen at the coronal root level, followed by the middle, while the worst cleanliness was at the apical level. RealSeal SE sealer showed the best adaptation to canal walls after using EDTA/ green tea, followed by EDTA/NaOCl , followed by NaOCl/green tea with the least adaptation was seen with green tea irrigation. RealSeal SE sealer showed lower bond strength mean value that varied significantly from AH Plus resin sealer. RealSeal SE sealer showed the highest bond strength mean value with EDTA/ green tea followed by EDTA/ NaOCl, followed by NaOCl /green tea , with the least value was seen with green tea with a statistically significant difference between all subgroups. AH Plus sealer showed the highest bond strength mean value with EDTA/ NaOCl irrigation followed by EDTA/green tea ,followed by NaOCL/ green tea, and then green tea with a statistically significant difference between all subgroups.. Both sealers showed the best bond strength mean value at the coronal root level, then the middle, while the least value was at the apical level. Failure mode analysis revealed that in Real Seal SE the predominant mode of failure was adhesive, while AH Plus showed a predominance of mixed failure.