engleski

Vibrations produced during erbium: yttrium-aluminum-garnet laser irradiation

The purpose of this study was to evaluate vibrations induced by an Er:YAG laser in the non-contact mode and compare the vibrations with different pulse durations and energy parameters. The experiment was conducted on an extracted tooth built up in the silicone impression material. The vibrations were measured by Piezoelectric accelerometer for a super-short pulse (SSP), a very short pulse (VSP), a short pulse (SP) at a frequency of 5 Hz during 1 second. For VSP and SP, the energy parameters tested were 200 mJ, 300 mJ, 400 mJ. Measurements were performed 15 times for each individual irradiation-energy level. The highest values of vibrations were measured for SP (0.160&#177; ; ; ; ; 0.04 m/s2), and the lowest were measured for VSP mode at the energy parameter 200 mJ (0.05&#177; ; ; ; ; 0.02 m/s2). There was a statistically significant (p<0.01) difference between the various laser-pulse modes (SSP, VSP, SP) at different energy parameter. The least amount of vibrations during the non-contact Er:YAG laser cavity preparations was produced by SSP mode of at 300 and 400 mJ.

Er:YAG laser; tooth preparation; piezoelectric accelerometer; vibration

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