Abstract
The aim of this work was to study the structural aspects of dentin surface by CO2 laser irradiation. One hundred specimens were lased with 3 W for 1, 3, 5, 10, and 15 sec. The irradiated hemisections were processed for SEM observation. With 3 W power emission during 1 sec the samples revealed a crusty wavy aspect. At the edges of the crusts, the dentine had been melted, and was slightly separated from the wall showing an actual cutting effect. When the irradiation time (IT) was increased to 10 and 15 sec fungi formations were observed. Melted recrystalized dentin rims were visible in certain areas. CO2 laser irradiation induces coagulation, vaporization, and melted tissue with cracks and carbonizations areas.
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