Ultrastructural study of sclerotic dentin surface following the application of the Er, Cr: YSGG laser

VernacularTitle:Er,Cr:YSGG激光照射后硬化牙本质表面超微结构观察
Author: Xiao-Chen JIN ¹ ; Jian-Guo TAN ; Gui-Rong ZHANG ; Hong YU
Author Information

1. 北京大学口腔医学院(口腔医院)
Keywords: Lasers; Sclerotic dentin; Ultrastructure
From: Chinese Journal of Stomatology 2009;44(3):159-161
CountryChina
Language:Chinese
Abstract: Objective To investigate the uhrastrueture character of sclerotic dentin surface conditioned by the Er, Cr: YSGG laser and acid etching.Methods Sixteen human teeth with sclerotic dentin were randomly assigned to 4 groups, and conditioned with acid etching (Group A) ,laser irradiation (Group B), laser irradiation after acid etching (Group C), or acid etching after laser irradiation (Group D) respectively.The characters of surface ultrastructure were observed using scanning electron microscope (SEM).Results In Group A, the majority of dentin tubules were blocked by sclerotic rods.In Group B, the honeycomb-like change was found on the sclerotic dentin surface.The surface structure of Group C was similar to that of Group B.In group D etching wiped off the honeycomb-like structure.Conclusions The sclerotic dentin surface treated with laser irradiation turns into uniform honeycomb-like structure.The rough surface may be beneficial to bonding strength on sclerotic dentin after laser irradiation.