Effect of Er,Cr:YSGG laser on human dentin fluid flow.
The aim of the current investigation was to assess the rate and magnitude of dentin fluid flow of dentinal surfaces irradiated with Er,Cr:YSGG laser. Twenty extracted third molars were sectioned, mounted, and irradiated with Er,Cr:YSGG laser at 3.5 and 4.5 W power settings. Specimens were connected to an automated fluid flow measurement apparatus (Flodec). The rate, magnitude, and direction of dentin fluid flow were recorded at baseline and after irradiation. Nonparametric Wilcoxon signed ranks repeated measure t test revealed a statistically significant reduction in fluid flow for all the power settings. The 4.5-W power output reduced the flow significantly more than the 3.5 W. The samples showed a baseline outward flow followed by inward flow due to irradiation then followed by decreased outward flow. It was concluded that Er,Cr:YSGG laser irradiation at 3.5 and 4.5 W significantly reduced dentinal fluid flow rate. The reduction was directly proportional to power output.
Department of Prosthodontics, Faculty of Dentistry, Jordan University of Science and Technology, Irbid, 22110, Jordan, womari@just.edu.jo.
Wael M
WM
Al-Omari
Joseph E
JE
Palamara
D003804:Dentin / Q000503:physiopathology / Q000528:radiation effects / Q000648:ultrastructure; D003807:Dentin Sensitivity / Q000473:pathology / Q000503:physiopathology / Q000532:radiotherapy*; D006801:Humans; D057446:Hydrodynamics; D053844:Lasers, Solid-State / Q000627:therapeutic use*; D028022:Low-Level Light Therapy; D008855:Microscopy, Electron, Scanning; D010865:Pilot Projects