The effects of different ultrasonic retrotips in the canal isthmus retropreparation

VernacularTitle:不同超声倒预备尖对根管峡部预备成型的体外实验比较
Author: Pingjuan ZHANG ; Wenxia CHEN ; Qixin ZENG ; Fangfang XIE
Publication Type:Journal Article
Keywords: Ultrasonic instruments; Retropreparation; Canal isthmus
From: Journal of Practical Stomatology 2014;(6):842-845
CountryChina
Language:Chinese
Abstract: Objective:To compare the quality of the canal isthmus retropreparation among three ultrasonic retrotips.Methods:120 maxillary bicuspid teeth with 2 canals and an isthmus were randomly assigned to 3 groups(n =40).The canal isthmus were retro-preparated by ultrasonic Ni-Ti tip RE2,diamond tip Berutti and #25K file respectively.The quality of cavity margin,the number and type of the micro-cracks were evaluated by SEM.Data were statistically analysed by Kruskal Wallis Test of SPSS 13.0.Results:The cavity margin quality of ultrasonic Ni-Ti tip RE2 group was superior to that of other 2 groups(P =0.003);The number of micro-crack in Ni-Ti tip RE2 group was less than that of other 2 groups(P =0.003).The type of micro-cracks has no significant difference among the 3 groups(P =0.830).Conclusion:Ultrasonic Ni-Ti tip RE2 is feasible in the canal isthmus retropreparation.