Comparison of root canal morphology and microleakage after cleaning with Er∶YAG laser and ultrasonic irrigation
SUN Ning-jia
GUO Wei
Abstract：AIM:To compare the root canal morphology and microleakage after cleaning with Er∶ YAG laser and ultrasonic irrigation.METHORDS:81 extracted mandibular first premolars were divided into 9 groups (n =9),negitave control group (A,normal saline),positive control group (B,NaC1O),ultrasonic group (C),Er∶YAG laser groups(0.3 W,0.6 W,0.9 W) (D,E,F),and combined groups (Er∶YAG laser + ultrasonic irrigation,0.3 W,0.6 W,0.9 W) (G,H,I).The teeth were instrumented and irrigated with PIPS technique and Er∶YAG laser with different parameters and ultrasonic.Then 54 roots were tested with infiltration test for the measurements of the length and proportion of dye infitration,and 27 roots were observed with SEM for the analysis of inner morphology of root canals.RESURTS:The dye infiltration was shorter in Er∶YAG laser group(D,E,F) than that in the combination groups(G,H,I),and in group D was the shortest (P ＜0.05).The proportion of dye infiltration was widest at apical root canals (P ＜ 0.05) than that at the coronal and middle part of root canals.SEM observation showed dentinal tubule exposure rate was the highest at coronal area in each group (P ＜ 0.05) and the exposure rate was higher in group D and E than that in other groups (P ＜ 0.05).CONCLUSION:Er ∶ YAG laser with 0.3 W is more effective in clean up the smear layer than ultrasonic and the combination technique.Laser combined with ultrasonic irrigation may produce microleakage of root cannal dentine.
Keywords：Er∶ YAG laserultrasonic irrigationmicroleakagesmear layer
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：10( 689-697,712 )