In vitro evaluation of retreatment efficacy of Mtwo rotary instruments
10.12016/j.issn.2096-1456.2017.07.004
- Author:
TONG Fangli
1
;
YANG Qin
2
;
ZENG Xiongqun
1
Author Information
1. Department of Endodontics, Stomatological Hospital, Southern Medical University
2. Haizhu Branch, Stomatological Hospital, Southern Medical University
- Publication Type:Journal Article
- Keywords:
Mtwo rotary instruments;
Manual instruments;
Root canal preparation;
Root canal filling;
Root canal retreatment
- From:
Journal of Prevention and Treatment for Stomatological Diseases
2017;25(7):426-429
- CountryChina
- Language:Chinese
-
Abstract:
Objective: To evaluate the efficacy of Mtwo rotary instruments during root canal retreatment.
Methods :Thirty mandibular premolars with oval root canal were prepared with ProTaper rotary instruments and obturated with lateral condensation method. The samples were divided into 2 groups. In Mtwo group, the filling materials were removed with Mtwo retreatment system and Mtwo basic instruments. Inmanual stainless group, the filling material were removed with manual instruments. The percentage of residual filling material was measured with image proplus software and the operating time was recorded.
Results:The percentage of residual filling material in Mtwo group was significantly lower than manual group in middle third, but the opposite result can be found in the coronal third. In the whole canal, no significant difference was found between the two groups. The mean operating time in Mtwo group was significantly shorter than manual group.
Conclusion :Mtwo rotary instruments can shorten the time of retreatment, neither of the groups can remove the filling material in oval root canal completely.
- Full text:Mtwo镍钛系统去除根管内充填物的效果评价.pdf
