การพยากรณ์การเปลี่ยนสีฟันหลังฟอกสีฟันด้วยระบบที่กระตุ้นด้วยแสงแอลอีดี โดยใช้แบบจำลองคอมพิวเตอร์ (PREDICTION OF COLOR CHANGE AFTER LED-ACTIVATED BLEACHING USING COMPUTER MODEL)
Keywords:
CIE Lab Color System, Bleaching, LED-Activated Bleaching System, Total Color Difference (ΔE), Bleaching Computer ModelAbstract
Abstract
The study aims to investigate the whitening efficacy of tooth change after bleaching, create and evaluate a bleaching predictive computer model to forecast the color change of teeth after LED whitening. A total of 30 subjects, age 18 to 32 years, were enrolled in the study by purposive sampling. 25% hydrogen peroxide activated with LED (ZoomTM, Discus dental Inc, USA) was used to bleach anterior teeth to the first premolar teeth. Shade evaluations on the right canine were performed before and immediately after treatment using Vita Classical Shade Guide and spectrophotometer (VITA Easyshade® advance, Vident, USA). Shade was determined by 2 dentists (Kappa = 0.704).
The Easyshade device indicated lightness (L*), red/ green (a*), yellow/ blue (b*) and color differences (∆E). A linear-regression equation was obtained from the color data to generate the Easy Click tooth color predictor computer model. The accuracy of the model was confirmed by 10 subjects.
The results showed that after treatment, the average total tooth color difference after treatment was 7.83±3.49 recorded by the VITA shade system. The mean shade change after active treatment was 8.07±.3.36. measuring by VitaEasyshade (Vident, USA). The equation in the linear regression analysis was ∆E = 0.309b*. The predicted ∆E equals 88.43 percent, while the mean square error was 33.6 percent. According to the bleaching computer model in 10 subjects, accuracy in color changing post bleaching was 90 percent.
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References
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