不同溶剂去除根管内充填材料的效果评价OA

Objective:To evaluate the effectiveness of sweet orange oil,mandarin oil,and coconut oil as organic sol-vents in removing root canal filling materials.Methods:Sixty single-rooted extracted teeth were selected,with coronal tooth tissue removed to ensure a working length of 12 mm for all root canals.The root canal was sealed after being prepared and filled by the same doctor.The samples were randomly divided into four groups:Group A(control group),Group B(sweet or-ange oil group),Group C(mandarin oil group),and Group D(coconut oil group),each consisting of 15 teeth.The root canal filling removal and root canal preparation time and the percentage of residual material on the root canal walls among different groups treated with various solvents were compared.Vickers microhardness tester was using to measure microhardness on all samples.Image-Pro Plus image software was employed to analyze and measure the area of open dentinal tubules and perform statistical analysis.Results:Orange oil and mandarin oil groups both reduced the operation time for removing root canal filling materials and the ratio of residual material area compared to the coconut oil and control groups(P<0.05).However,there was no statistically significant difference between the orange oil and mandarin oil groups,nor between the coconut oil group and the control group.The dentin microhardness in the orange oil and mandarin oil groups were significantly different from those in the control and coconut oil groups,respectively(P<0.05),the microhardness of root canal dentin increased in the orange oil and mandarin oil groups,but there was no statistically significant difference between the two groups.The control group had a larger open dentinal tubule area than the solvent group(P<0.05),but there was no statistically significant difference in the open dentinal tubule area between the solvent groups.Conclusion:Although sweet orange oil and mandarin oil can both effec-tively remove root canal fillings and increase dentin microhardness,all three solvents affect the opening of dentinal tubules,indicating that appropriate indications should be sought when using them.