Er:YAG laser cavity profile affected by an FCP silver hollow glass waveguide delivery system
The evaluation of a cavity profile prepared in hard tissue by the radiation of Er:YAG dental laser with either a fluorocarbon polymer-coated silver hollow glass waveguide or an articulated arm as a delivery system is the objective of present study. Shape of holes in the enamel, dentin and ivory were studied for different energy (from 70 mJ to 450 mJ/pulse) and number of pulses (from 1 to 10). Scanning electron microscopy, photographs and X-ray microtomography were used for analysis of results. Differences between contact and non- contact preparation were studied. As the results it was found that the shape of cavity made by the waveguide delivery system is wider and flatter in comparison with the cavities prepared with the help of mirror arm. Bottom surface of the cavity has a smooth relief, edge of cavity is sharply determined. With the contact preparation the hole could be made with better precision and with comparatively smaller value of energy.
This paper was published in SPIE Proceedings Vol. 3564