Humans 2 human 2 yttrium Adult 1 Alpha Rhythm 1 Article 1 CO2 laser 1 Cerebral Cortex 1 Dental Etching 1 Dental Materials 1 Er: YAG laser 1 Feasibility Studies 1 Lasers 1 Lasers, Gas 1 Lasers, Solid-State 1 Magnetoencephalography 1 Magnetometry 1 Profilometry 1 SEM 1 Sandblasting 1 Surface Properties 1 Surface roughness 1 Y-TZP 1 Yttrium 1 Zirconium 1 adult 1 alpha rhythm 1 anisotropy 1 brain 1 brain cortex 1