20.500.12556/RUL-182162 Obarvanje zob diplomsko delo Tooth discoloration diploma work Uvod: Barva naravnih zob se spreminja skozi življenje. Odvisna je od absorpcijskih lastnosti sklenine, razpršitve svetlobe in absorpcije snovi v sklenino. Za prikaz barve naravnih zob se pogosto uporablja barvni prostor CIE L*a*b* ali barvni prostor L*C*h*. Barvo zob lahko določimo s pomočjo barvnih ključev ali pa si pomagamo z napravami, kot je spektrofotometer. Obarvanje zob je lahko notranje in zunanje. Notranje obarvanje je običajno posledica poškodb ali razvojnih motenj, zunanje pa nastane zaradi nabiranja organskih in anorganskih madežev v zobnem plaku oziroma zaradi nalaganja kromogena na površini zoba. V primeru notranjega ali zunanjega obarvanja si lahko pomagamo z beljenjem, estetskimi zobnimi nadomestki ali belilno ortodontsko opornico. Namen: Namen diplomskega dela je ugotoviti, katera tekočina najbolj obarva zobni nadomestek glede na material, iz katerega je izdelan. Metode dela: Za pisanje diplomskega dela smo pregledali strokovno literaturo, ki smo jo našli v iskalnih bazah, kot sta Google Scholar in ScienceDirect. Pri iskanju smo uporabljali večinoma angleške besede v povezavi z obarvanjem zob. Na podlagi najdene literature smo načrtovali in izvedli poskus, s katerim smo preverili barvno stabilnost dentalnih materialov. Poskus je bil izveden v prostorih Zdravstvene fakultete Univerze v Ljubljani. Izdelali smo vzorce iz treh različnih dentalnih materialov (polimetil metakrilat, kompozit in cirkon) in jih izpostavili štirim tekočinam – kavi, vinu, črnemu čaju in soku. Poskus je trajal 34 dni. Po 27 dneh izpostavitve tekočinam smo vzorce izpostavili še vodikovemu peroksidu in jih tako razbarvali. Meritve smo opravljali s kromametrom. Rezultati: Glede na poskus je vino tekočina, ki najbolj obarva zobe. Cirkon se je izkazal za barvno najbolj stabilen material. Najbolj pa se je obarval polimetil metakrilat. Razprava in zaključek: Rezultati našega poskusa se ne ujemajo z določenimi študijami iz literature. Glede na literaturo zobe najbolj obarva črni čaj, glede na rezultate našega poskusa pa še več barve na zobeh pusti vino. Med obarvanjem so vse vrednosti ostale znotraj mejnih vrednosti, določenih v literaturi. Za opravljanje meritev so primernejše instrumentalne naprave, saj so hitrejše, bolj subjektivne in natančnejše. Obarvanje lahko rešujemo z beljenjem ali keramičnimi luskami. Introduction: The colour of our teeth changes throughout our whole lives. It depends on the absorption properties of the enamel, light scattering, and the ability to absorb different substances into the enamel. The colour of our natural teeth is commonly represented with the CIE L*a*b* colour space or the L*C*h* colour space. We can determine tooth colour manually, with the help of shade guides, or with different devices, such as a spectrophotometer. Tooth discolouration can be internal or external. Internal discolouration is commonly the result of trauma or developmental disorders, while external discolouration occurs due to the accumulation of organic and inorganic material found in plaque or due to the accumulation of chromogens on the surface of the tooth. We can treat internal and external discolouration with different methods, such as tooth whitening, aesthetic dental restoration, or orthodontic whitening trays. Purpose: The aim of this thesis is to determine which liquid causes the greatest discolouration of dental restorations, depending on the material used for their production. Methods: For the purpose of writing this thesis, we reviewed the literature found in databases such as Google Scholar and ScienceDirect. During the search, we mainly used English keywords related to tooth discolouration. Based on the literature we found, we conducted an experiment to evaluate the colour stability of the materials. The experiment was carried out at the Faculty of Health Sciences, University of Ljubljana. The samples of dental restorations were made from three different materials (polymethyl methacrylate, composite, zirconia) and were exposed to four different liquids (coffee, wine, black tea, juice). The experiment lasted 34 days. After 27 days of exposing the samples to the liquids, we additionally exposed them to hydrogen peroxide for bleaching. For our measurements, we used a chromameter. Results: Based on the results of the experiment, wine causes the greatest discolouration. Zirconia has been proven to be the most colour-stable material, while polymethyl methacrylate was the material with the greatest discolouration. Discussion and Conclusion: The results of our experiment do not entirely correspond with some of the reviewed studies. According to the literature, black tea causes the most discolouration, but based on our experiment, wine causes even greater discolouration. During the staining process, all values remained within the threshold limits defined in the literature. For conducting the measurements, instrumental devices were more suitable, as they were faster, more objective, and more accurate. Teeth discolouration can be managed with whitening or ceramic veneers. diplomska dela laboratorijska zobna protetika barva barvni prostor barvna stabilnost beljenje luske poskus diploma theses laboratory dental prosthetics colour colour space colour stability whitening veneers experiment true false false [P. Jesenko] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2026-04-26 07:45:59 2026-04-26 07:46:10 2026-04-28 08:48:02 0000-00-00 00:00:00 2026 0 Ljubljana 0 Ljubljana XIII, 67 str., [57] str. pril. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 616.31 159537 276604931 58886.pdf 58886.pdf 1 DA1299442DF6F919F40E9E9437176CA5 0c7dda03dda848727417b25a5ac8dbe49e2d6ac7069edb686a7f0a28a9882b91 f7085401-4132-11f1-b0ab-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=233137 Zdravstvena fakulteta 0 0 0