Publications by authors named "D Strakas"
This study evaluated the changes in surface properties of three resin-based restorative materials after two laser-assisted, in-office tooth bleaching protocols using erbium, chromium: yttrium-scandium-gallium-garnet (Er,Cr:YSGG) or diode (980 nm) lasers. A nanohybrid composite (Enamel Plus HRi), a Bis-GMA-free composite (Enamel Plus HRi Bio Function), and a resin-matrix CAD-CAM ceramic (Shofu Block HC) were tested. Forty specimens for each material were prepared and divided into four groups (n = 10/group).
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- The study assessed the effectiveness of a diode laser (445 nm) for in-office tooth bleaching, testing various power settings (0.5-2 W) and durations (10-60 s) on human incisors.
- Two hundred incisors were analyzed for color change (ΔΕ) and whiteness index (ΔWI) after treatment, with results showing significant factors influencing effectiveness included power, duration, and time of measurement (p < 0.05).
- The findings indicate that longer laser exposure times (50-60 s) at lower powers (0.5-1 W) and moderate powers (1.5-2 W) significantly enhanced bleaching effects compared to a control group, providing valuable insights for optimal tooth
The aim of this in vitro study was to investigate the safety of using blue diode laser (445 nm) for tooth bleaching with regard to intrapulpal temperature increase operating at different average power and time settings. Fifty human mandibular incisors (n = 10) were used for evaluating temperature rise inside the pulp chamber and in the bleaching gel during laser-assisted tooth bleaching. The change in temperature was recorded using K thermocouples for the five experimental groups (without laser, 0.
View Article and Find Full Text PDFEvaluation of repair bond strength of a dental CAD/CAM resin composite after surface treatment with two Er,Cr:YSGG laser protocols following artificial aging.
J Mech Behav Biomed Mater
October 2023
The aim of the present study was to evaluate the impact of two Er,Cr:YSGG laser surface treatments on the repair bond strength of a dental CAD/CAM resin composite (Brilliant Crios) after artificial aging. Twenty-four resin-based CAD/CAM blocks were cut and 48 rectangular slabs (3 x 12 x 14 mm) were prepared. Preliminary SEM observations indicated the most favorable laser settings regarding surface modification of the tested restorative material.
View Article and Find Full Text PDFThe aim of this laboratory study was to investigate and compare the impact of five desensitizing techniques as a treatment fortooth sensitivity on the exposed dentin after an in-office tooth bleaching procedure. Thirty intact human molars were collected for this investigation. The specimens were obtained by transversely cutting 2.
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