Farklı Işık Kaynakları İle Aktive Edilen Beyazlatma Ajanının Klinik Etkinliğinin Değerlendirilmesi
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Uslu, A. Effect of Different Light Sources on the Clinical Efficacy of Light Activated Bleaching Treatments. Hacettepe University, Faculty of Dentistry, Department of Restorative Dentistry, Specialization Thesis, Ankara, 2019. The aim of this split-mouth, randomized clinical study was to evaluate the effect of LED or Diode laser activated bleaching applications on color change, tooth sensitivity, gingival irritation and temperature variation with 35% hydrogen peroxide bleaching gel after 9 months. Thirty-five patients with anterior teeth without caries and no restoration were included in this study. In a split-mouth design, a bleaching agent containing 35% HP (Whiteness HP, FGM) was used, one side of each jaw was activated by a diode laser (Epic X, Biolase) and the other side was activated by an LED (Radii Plus, SDI) light source. During the bleaching treatments, the temperature variations were recorded using a thermocouple (DT-3891G K type Thermometer datalogger, CEM Instruments) from the buccal surface of canine teeth. Tooth sensitivity was assessed by Visual Analogue Scale (VAS) before the treatment and during, immediately, 48 hours, 1 week, 1, 6 and 9 months after. Color change was evaluated by subjective (Vita Classic and Vita 3D Master Bleachguide) and objective methods (Vita Easy Shade, spectrophotometer) before the treatment and immediately, 48 hours, 1 week, 1, 6 and 9 months after. Color change (ΔE and ΔSGU) was performed by analysis of variance in repeated measurements. Multiple comparisons were evaluated by Bonferroni test. Temperature variation was evaluated by t-test in dependent groups. Tooth sensitivity was analyzed using Friedman test. Wilcoxon test was used to compare two light sources (Diode Laser/ LED) in each time period (p< 0.05). No difference was found between Diode laser and LED light sources in terms of ΔSGU values in subjective color evaluation (p> 0.05). In the objective color evaluation, no difference was found between Diode laser and LED light sources in terms of mean ΔE values in all time periods, except for 6-month recall (p> 0.05). In the 6-month spectrophotometric evaluation, significantly higher ΔE values were obtained with Diode laser (p <0.05). The temperature difference and maximum temperature on the surface of the tooth with Diode laser was found significantly higher than LED (p<0.05). When the mean temperatures were compared, higher values were observed with LED light source (p <0.05). There was no difference in tooth sensitivity and gingival irritation at any of the evaluated time periods (p> 0.05). Within the limitations of this in vivo study, there was no difference between the Diode laser and LED light sources for activating the current bleaching agent in terms of color change, tooth sensitivity, and gingival irritation (p> 0.05). While the temperature difference and maximum temperature values on the tooth surface were higher with Diode laser, the mean temperature was higher with LED light source (p <0.05).