Effects of different irrigation solution on the root canal number and preparation efficiency of rotary Ni-Ti instrument
HAO Wen-jun
LIU Hai-yun
BAO Jia-xin
LI Chang-jian
LI Yan-feng
Abstract：Objective:To explore the effect of different root canal irrigation solution on the preparation capacity of rotary Ni-Ti instrument by comparing the number of prepared root canals and the average lifting times of the nickel-titanium files.Methods:According to the 4 different root canal irrigation solutions,nickel-titanium file ProTaper Universal (PTU) F 1 were randomly divided into 5 groups:Group A:sterile distilled water;Group B:0.9％ saline;Group C:1％ sodium hypochlorite;Group D:5％ sodium hypochlorite;Group E:no irrigation solution.There were 20 files in each group.These PTU Flftles were used to prepare the root canals in a resin module simulating curved root canal.Four different kinds of irrigation solution were used in the preparation process,except for the control group.The total number of prepared root canals and the average lifting times before each PTU F 1 file being broken were recorded.Furthermore,the average lifting times of a single root canal were calculated.The differences between the groups were compared by one-way ANOVA and LSD-t test.Results:The total numbers of prepared root canals and average lift times of single root canals under in each group were as follows:Group A:6.99±3.52 and 18.59±2.23;Group B:6.25± 1.72 and 17.81±0.80;Group C:6.80±3.23 and 17.82± 1.27;Group D:4.04±2.31 and 20.35±2.66;Group E:4.03±2.32 and 22.50±6.57.Group D and E are different regarding the average lifting times,and there are significant difference in group D and E comparing group A,B,C respectively in the total number of prepared root canals and the average lifting times (P＜0.05).Conclusion:The sterile distilled water and 0.9％ saline as well as 1％ sodium hypochlorite are able to remarkably increased the root canal number of nickel titanium file and improved preparation efficiency.Moreover,5％ sodium hypochlorite solution can only slightly reduce the preparation efficiency,but have no effect on the root canal number.
Keywords：root canal preparationNi-Ti rotary instrumentsirrigation solutionroot canal numberpreparation efficiency
Publication Date：2018-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 133-136 )