Original Article Cleaning of Endodontic Files with and without Enzymatic Detergent by Means of the Manual Method Versus the Ultrasonic Method: An Experimental Study
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2021Autor(es)
Cayo-Rojas1, César Félix2,3,4
Brito-Ávila5, Estefany
Aliaga-Mariñas2, Ana Sixtina
Hernández-Caba2, Karen K.
Saenz-Cazorla3, Emylain D5
Ladera-Castañeda1, Marysela I.2,
Cervantes-Ganoza3, Luis A.
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The aim of this article is to evaluate the cleanliness level achieved with
and without the application of enzymatic detergent for the manual method
versus the ultrasonic method, applied to Flexoreamer K-type files No. 25, No.
30, and No. 35. Materials and Methods: 192 K-type Flexoreamer files were
divided into four categories: A1 (ultrasonic method with enzymatic detergent),
A2 (ultrasonic method without enzymatic detergent), B1 (manual method with
enzymatic detergent), and B2 (manual method without enzymatic detergent).
Each category was randomly distributed in three groups of 16 files each (No.
25, No. 30, and No. 35). The files were used for biomechanical instrumentation
of the root canal in premolars. The active part of the files was examined under a
stereomicroscope, considering four cleaning levels: 4 (100% cleanliness), 3 (95–
99% cleanliness), 2 (85–94% cleanliness), 1 (75–84% cleanliness), and 0 (less than
75% cleanliness). For hypothesis testing, the Mann–Whitney U-test was used to
differentiate between techniques, and the Kruskal–Wallis multiple comparison
test was used to compare pairs of files within each cleaning method. Results:
When using enzymatic detergents, the manual and ultrasonic methods did not
show significant differences when comparing each group of the files analyzed
(P > 0.05). However, when comparing the cleaning level without enzymatic
detergent between the manual and ultrasonic methods, we observed that it
obtained a superior result when compared with the manual method for each type
of file: No. 25 (P = 0.021), No. 30 (P < 0.001), and No. 35 (P < 0.001). Both
methods achieved a significantly higher level of cleaning with the application
of the enzymatic detergent (P < 0.05) than without applying it. Conclusion:
The ultrasonic cleaning method proved to be the most effective method for the
removal of biologic waste when compared with the manual method using a nylon
brush. However, there was no significant difference between these two methods
when enzymatic detergent was used.
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