EFFECTS OF DIFFERENT TAPERS ROOT CANAL PREPARATION ON ROOT CANAL FILLING USING GUTTAFLOW2

Lu Bai, Chengfang Wu, Yan Sha, Nannan Zhai

Abstract


Study the effect of root canal preparation in three different tapers on the effect of root canal lling using the second generation novel cold ow root
canal lling system in vitro. 60 extracted human premolars with single root canal were divided randomly into 3 groups(A:02taper, B:04taper,
C:06taper and N=20). The root canals were prepared using NIC® Super File to 3 different tapers to get to 30#,and were obturated with GuttaFlow2
in single-cone obturation technique.Then the roots were sectioned at 3 and 6mm from apical foramen. All the sections were observed under a
stereo-microscope.Then these images were collected and analyzed.The percentage of gutta-percha-lled area(PGFA) was calculated by the
software.The lling effect of root canals were evaluated and recorded by X-ray. As the increasing of the root canal taper,at the 3mm level from apex,
the PGFA of group C was signicantly higher than that of the group A (p<0.05),and the PGFA between the three groups was statistical signicance
(P<0.05). At the 6mm level from apex,those of 3 groups have no statistical signicance (p>0.05). As the increasing of taper, the number of under-
lled root canal in the 3 groups decreased, but there was no statistical signicance in the 3 groups. When the taper of NI-TI instrument increase up to
06, it can effectively improve the effect of sealing in root canal lling and reduce the under-lled with the GuttaFlow2.But the effect of resisting
force of the tooth root remains to be studied.


Keywords


GuttaFlow2; NI-TI instrument; root canal preparation; taper; effect of root canal lling

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References


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