Analysis of Nd: YAG Laser (1064 and 532 nm) Interaction with Zirconia Dental Implant after Different Exposure Time

摘要

Objectives: The aim of this study is to investigate the effect of Nd-YAG laser of (1064 and 532) nm wavelength in modification of zirconia implant surface roughness in order to enhance the progress of Osseo integration. Materials and methods: Zirconia block (inCoris, Sirona) used in preparation of experimental samples. The cutting was made by CADlCAM technique. The sectioned samples were polished by using diamond paste, then sintered to get discs of (10.2) mm of diameter and thickness respectively. Q-switched Nd-YAG laser used in different parameters in this study. For (1064) nm wavelength, the used flounce was (38.22)J2, frequency (10) Hz and the exposure time was (3, 5 and 7) seconds in three separate trials. For (532) nm wavelength, the used flounce was (19.11)J2, frequency (10)Hz and the exposure time was (3, 5 and 7) second in three separate trials. All irradiated samples were assessed by scanning electron microscope and atomic force microscope for surface topography and surface roughness changes respectively. Results: The SEM images showed increased surface porosity of irradiated samples, cracks free surfaces for both wavelengths. AFM results revealed increased surface roughness directly with exposure time for both wavelengths. Conclusion: Q-switched Nd-YAG laser of (1064 and 532) nm wavelengths can be used for modification of zirconia implant surface.