Removal of intracanal calcium hydroxide paste with two rotary systems: RaCe and Mtwo

Admin Dental Press

Edition V02N01 | Year 2012 | Editorial Original Article | Pages 23 to 27

Mehrnoush Ghobadi, Bahareh Dadresanfar, Hamideh Rahmani Raoof, Fatemeh Mashhadi Abbas

Introduction: The aim of this study was to compare the effectiveness of two rotary systems in calcium hydroxide removal from root canal walls. Methods: A total of 44 distobuccal root canals of human maxillary molars with curvatures between 15° – 25° were randomly divided into two groups of 20 canals each and two control groups. Specimens in group A were instrumented with RaCe rotary system and in group B with Mtwo rotary system up to #35 (4%). Canals were rinsed by 5 ml of 2.5% NaOCl between each instrument and #10 K-file was used as patency during filling. Calcium hydroxide paste was placed in the canals and after incubation; it was removed from canals by means of master apical rotary and NaOCl in each group. Roots were split longitudinally and the remnants were evaluated by stereomicroscope at three levels using a scoring system. Data were statistically analyzed with ANOVA test. Results: No significant difference was found in all groups in both RaCe and MTwo systems (p>0.05). Sum of the acceptable scores was found 53.6% in RaCe and 51.3% in Mtwo group, respectively. Conclusion: None of the canals was totally free of calcium hydroxide remnants. Although there was no significant difference between groups, there was a slightly better clinical impression of cleanliness with Mtwo system as to calcium hydroxide removal.

Calcium hydroxide, Sodium hypochlorite, Root canal preparation,

Ghobadi M, Dadresanfar B, Raoof HR, Abbas FM. Removal of intracanal calcium hydroxide paste with two rotary systems: RaCe and Mtwo. Dental Press Endod. 2012 Jan-Mar;2(1):23-7.

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