Department of Biomedical Applications, Institute of Laser for Postgraduate Studies, University of Baghdad, Baghdad, Iraq
*Corresponding e-mail: al.meran1988@gmail.com
Online published on 13 December, 2018.
The aim of this study was to investigate the relation between dentinal cracks and dentin mineral contents after irradiation with Er, Cr: YSGG laser.
Average power was 3.75 W, the frequency was 15 Hz, 30% water, 60% air, the energy density was 31.84 J/Cm2.
Ten teeth of single canals were biomechanically prepared and obturated then the root end was resected using carbide cross cut bur at 0° bevel. The retrograde cavity was prepared using Er, Cr: YSGG 2780 nm laser delivered through MZ6 glass tip of 660 μm diameter. Samples were prepared for SEM and examined to evaluate dentinal cracks then examined using Energy dispersive X-ray spectroscopy (EDX) which was performed to measure the mineral contents of dentin at the retrograde cavity.
High fluctuation of dentinal cracks´ occurrence from absence to 7 cracks.
EDX showed no correlation between the occurrence of dentinal cracks and the weight % of Ca and P within the dentin in the retrograde cavity.
EDX, Dentinal cracks, Er, CrYSGG laser, Ca, P
