engleski

Erbium:YAG laser versus ultrasonic in preparation of root-end cavities

The aim of this in vitro study was to compare Er:YAG laser to the ultrasonic device in preparation of a retrograde cavity regarding the sealing ability of different retrograde filling materials. After root-canal instrumentation and filling, apices of sixty single-rooted teeth were resected at 3 mm from their apices. Retrograde Class I cavities 3 mm deep, were prepared using an ultrasonic device (Group A) or Er:YAG laser (Group B). CT-5 retrotip on an ultrasonic unit at a frequency of 32 KHz was used. Laser beam parameters were: a pulse of very short duration (100µ ; ; ; ; ; ; s), energy of 280 mJ, and repetition rate of 10 Hz. Cavities of each group were filled with mineral trioxide aggregate (MTA) ; Super-EBA and IRM, 10 samples for each material. Microleakage was measured using a fluid transport model. The results showed that cavities prepared with Er:YAG laser have significantly lower microleakage with all tested materials.

Er:YAG laser ; ultrasonic ; root-end preparation

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