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Comparison of the formation ability of two types of machine-made nickel-titanium instruments in simulated curved root canals / 口腔疾病防治
Journal of Prevention and Treatment for Stomatological Diseases ; (12): 246-249, 2019.
Article in Chinese | WPRIM | ID: wpr-750810
ABSTRACT
Objective@#To compare ProTaper Universal (PU) and M3-L instruments in preparing curved root canals and to provide a reference for clinical applications.@*Methods@#Twenty resin-simulated curved single root canals were randomly divided into two groups. Root canal preparation was performed with a PU nickel-titanium file or an M3-L nickel-titanium file. Root canal preparation time, root canal length before and after preparation and root canal deviation were recorded.@*Results@#In the M3-L group, the displacement measured at the 4th to 7th sites was less than that in the PU group (P < 0.05), but there was no significant difference between the other two groups (P > 0.05); The length of the root canal before and after root canal preparation in the M3-L group was (14.90 ± 1.92)mm and (14.57 ± 1.13)mm, respectively, and the difference between the two groups was not statistically significant (t=3.18, P=0.058). The root canal length before and after root canal preparation in the PU group was(14.53 ± 1.53)mm and (14.28 ± 1.39)mm, respectively. The difference between the two groups was not statistically significant(t=2.12,P=0.124); The average preparation time of the M3-L group [(110.15 ± 10.43)s] was less than that in the PU group [(330.48 ± 12.62)s] (P < 0.05).@*Conclusion @#The M3-L nickel-titanium file has better central positioning ability and is less time-consuming than the PU nickel-titanium file in root canal bending preparation.

Full text: Available Index: WPRIM (Western Pacific) Language: Chinese Journal: Journal of Prevention and Treatment for Stomatological Diseases Year: 2019 Type: Article

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Full text: Available Index: WPRIM (Western Pacific) Language: Chinese Journal: Journal of Prevention and Treatment for Stomatological Diseases Year: 2019 Type: Article