Examinando por Materia "Método ultrasónico de joyería"

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    Cleaning evaluation of endodontic manual files using the manual method compared to the ultrasonic mechanical method of jewelry.
    (Universidad Privada Norbert Wiener, 2021-07-07) Brito Avila, Estefany; Llerena Meza De Pastor, Verónica
    Objective: To evaluate the level of cleaning achieved by the manual and ultrasonic jewelry cleaning methods applied to K files No 25, 30, and 35. Materials and Methods: The population consisted of 96 K files (Maillefer®), divided into 3 groups of 16 files as follows: A1, A2, A3 (mechanical method) and B1, B2, B3 (manual method). The files were biomechanically worked on premolar teeth. After instrumentation, each file was cleaned with a nylon brush (Oral B® Pro-health) and enzymatic solution (Alkazyme®). Then, group A was immersed in the solution for 15 minutes and brushed again, while group B was placed in a jewelry ultrasonic cleaner (BAKU® BK-3550) at 50 W for 56 minutes (8 series of 420 seconds each). Subsequently, both groups were rinsed with distilled water and dried at room temperature. The files were then immersed in Crystal Violet staining. The active part of the files was visualized under a stereomicroscope, considering four levels of cleanliness: 4 (100% clean), 3 (95-99%), 2 (85-94%), 1 (75-84%), and 0 (less than 75%). Results: For the jewelry ultrasonic cleaning method, the median with the interquartile range of the cleaning percentage was: 82.73±11.72 (files No 25), 79.50±27.43 (No 30), and 62.75±49.31 (No 35). For the manual method, the values were: 84.37±40.56 (files No 25), 89.06±30.75 (No 30), and 48.13±36.94 (No 35). Both cleaning methods showed no statistically significant differences for each file group evaluated (p>0.05). Conclusion: The ultrasonic jewelry cleaning method demonstrated greater effectiveness in removing biological debris but not significantly compared to the manual method. Additionally, the highest cleaning level was achieved with No. 30 files using the ultrasonic method, while for No. 35 files, both methods were ineffective.