Abstract
In this study, the structure, and surface morphology of dentin after ablation with ultra-short pulses (USPL) were evaluated using environmental scanning electron microscopy (ESEM) with EDAX analysis and scanning electron microscope micrographs. The dentin specimens examined were irradiated by (100, 300 and 400 mJ) of ultra short pulse laser. Based on EDAX results, it was possible to identify the suitable energy density as the ablation threshold for dentin. The results demonstrate that by selecting suitable parameters one can obtain efficient dentin surface preparation without evidence of structural changes and thermal damage, i.e., with minimized heat affected zones and reduced collateral damage, which characterized by formation of microcracks , grain growth and recrystallization in the heat affected zones. [Ola. M. Sakr. Effect of Ulrra Short Pulse Laser on dentin structural changes and surface roughness. Life Sci J 2012;9(4):957-962] (ISSN:1097-8135). http://www.lifesciencesite.com. 148