Porumb Anca, Teusdea Alin Cristian, Earar Kamel, Gabor Gianina Adela
In our daysdental bleaching is required in dental practices but it has to be proceeded by a professional dental cleaning. A successful procedure can be made using Prophy-pearls granulesthat are particularly gentle on the teeth and provide optimum cleaning due to their round surfaces. The aim of this paper is to study the influence of Prophy-pearls granules on dental enamel, composite veneers and acrylic teeth after therapeutic administration of propolisethanolic extract. The study focuses on the aesthetic parameters such as colour, brightness, translucence. All thesamples were immerged in propolis extract for 5 days after a professional cleaning. Every day image captures were made to all the existing samples. The CIE L*a*b* colour space was used to chromatically characterize the samples. In order to compare the samples, direct chromatic comparison was done by colour difference calculation (ΔE). The initial samples and professional cleaned samples has no significant chromatic differences, but they differ significantly more than four times than between them. The experiments made during the study were used in orderto discriminate between the time stamps teeth staining status and the sandblasting treatment. The method used was the digital image capturing and colour image analysis (CIA). The results of the study revealed that the colour image analysis can discriminate between the propolisethanolic extract stained and non-stained veneers and natural teeth. Furthermore, the professional cleaning process was successful from the chromatic point of view.