Humans 2 Lasers, Gas gas laser 2 human 2 Adult 1 Aged 1 Aged, 80 and over 1 Article 1 Biopsy 1 CO2 laser 1 Cell Transformation, Neoplastic 1 Dental Etching 1 Dental Materials 1 England 1 Er: YAG laser 1 Female 1 Hyperplasia 1 Lasers 1 Lasers, Solid-State 1 Leukoplakia, Oral 1 Lichen Planus, Oral 1 Male 1 Middle Aged 1 Mouth Neoplasms 1 Profilometry 1 Retrospective Studies 1 SEM 1 Sandblasting 1 Surface Properties 1 Surface roughness 1