Document Type : Original Article
Authors
1
Associate Professor, Restorative and Dental Materials Department, National Research Centre, Dokki, Giza, Egypt.
2
Researcher, Surgery & Oral Medicine Department, National Research Centre, Dokki, Giza, Egypt.
3
Researcher of Endodontics, Restorative and Dental Materials Department, National Research Centre, Dokki, Giza, Egypt.
Abstract
Abstract
Aim: This study aims to assess the efficiency of conventional sodium hypochlorite (NaOCl) & Ethylene diamine tetraacetic acid (EDTA) irrigation and nano-herbal lemon grass irrigant with and without Er,Cr:YSGG and diode laser irradiation on removal of smear layer from root canal walls and evaluate their effect on mineral content of the root canal dentin.
Methods: Sixty extracted human single rooted teeth were used in this in vitro study. Then specimens were classified into two main groups (A and B) n=30 for each according to the irrigation type as nano-lemon grass irrigant was used in group A, and 2.5% NaOCl and 17% EDTA irrigants were used in group B. Each main group was sub-divided into 3 groups (n=10) according to laser activation system used for irrigant activation. ). Group (A1): nano-lemon grass, group (A2): nano-lemon grass with Er,Cr:YSGG laser, group (A3): nano-lemon grass with diode laser, group (B1): NaOCl and EDTA, group (B2): NaOCl and EDTA with Er,Cr:YSGG laser and group (B3): NaOCl and EDTA with diode laser. All samples were examined under scanning electron microscope to investigate the smear layer and detect the changes in dentin mineral content by energy dispersive X-ray. Statistical analysis was done using SPSS 16 ® (Statistical Package for Scientific Studies). Data examination for normality was done by Shapiro-Wilk test and Kolmogorov-Smirnov test. comparing between groups was done by One Way ANOVA test, Tukey`s Post Hoc test and Independent t- test.
Results: Regarding the smear layer removal, group (A1) had significantly the highest amount of smear layer, followed by group (A3), while group (A2) had significantly the lowest mean. Group (B1) had significantly the highest mean, followed by group (B3), while group (B2) had significantly the lowest mean. Regarding the mineral content; groups (A1 and B1) had significantly the highest value, followed by groups (A3 and B3), while groups (A2 and B2) had significantly the lowest value.
Conclusion: laser activation of irrigants increased their efficacy in smear layer removal; however it also affected the mineral content of the root canal dentin.
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