Examinando por Materia "Rotary instruments"

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(Universidad Privada Norbert Wiener, 2015) Sihuay Espinoza, Fiviana Danitsa; Galvez Ramirez, Carlos Michell
The objective of this research was to determine the factors associated with the noise level produced by high and low-speed rotary instruments according to usage time, brand, and maintenance. The study was descriptive, observational, prospective, and cross-sectional. A total of 128 rotary instruments, both high and low speed, were used, and the noise level was measured using a sound level meter during cavity preparation on models with natural teeth. The results showed that the average noise levels of the high and low-speed rotary instruments were below 85 decibels (dB). According to usage time, the highest noise level was found between 4 to 5 years for both types of instruments. By brand, the highest noise level for high-speed rotary instruments was found in brand 1, and for low-speed instruments, it was found in brand 3. Finally, according to maintenance, the highest noise level in both types of instruments was found in those that had not received maintenance. It was concluded that the most frequent factor associated with the noise level produced by high and low-speed rotary instruments was maintenance, and all instruments were below the 85 dB permissible exposure limit regulated by MINSA.