Emisije delcev prahu pri procesih v dentalnem laboratoriju

Kuder Marušič, Vid (author), Kosec, Borut (mentor), Ilić Mičunović, Milana (co-mentor)

Pri delu v dentalnih laboratorijih nastajajo prahovi oziroma delci prahov, ki v večini primerov negativno vplivajo na zdravje izpostavljenih. Stopnja tveganja za zdravje je odvisna od sestave in koncentracije delcev prahu ter trajanja izpostavljenosti. Prahovi so trdni delci, velikosti manjših od 1 µm do 100 µm, ki so lahko prisotni v zraku. Izpostavljenost inhalativnim frakcijam prahu, katerih najmanjši delci se ne ustavijo v nosu ali dihalnih poteh, ampak prodrejo tudi v najmanjše alveole, lahko vodi v tveganje za razvoj poklicnih pljučnih bolezni pri zaposlenih v dentalnem laboratoriju. V diplomskem delu so predstavljeni postopki in materiali, s katerimi se ukvarjajo dentalni tehniki, osnovne značilnosti prahov ter metode analize slike, med drugim so predstavljeni tudi Feretov premer delca, ekvivalentni premer delca, konveksnost, elongacija, krožnost in oblike delcev. V okviru eksperimentalnega dela sta bili opravljeni vzorčenji delcev prahu pri postopkih izdelave različnih dentalnih nadomestkov z osebnim merilnikom za vzorčenje EGO PLUS TT. Prvo vzorčenje je potekalo z uporabo ventilacijske naprave, drugo pa brez uporabe ventilacijske naprave. Analiza sestave delcev prahu je bila izvedena v skladu s standardom ISO 13322-1:2014 z vrstičnim elektronskim mikroskopom na poljsko emisijo Thermo Fischer Scientific Quattro S. Analiza je pokazala, da so bili najpogostejši delci prahu zlitinskega izvora, katerih večina je oksidirala.

• Language: Slovenian
• Keywords: delci prahu, dentalni laboratorij, vzorčenje, analiza, geometrija, sestava.
• Work type: Bachelor thesis/paper
• Organization: NTF - Faculty of Natural Sciences and Engineering
• Year: 2020
• PID: 20.500.12556/RUL-119490
• COBISS.SI-ID: 31687427
• Publication date in RUL: 09.09.2020

Secondary language

• Language: English
• Title: Dust particles emissions at processes in dental laboratory

Abstract

When working in dental laboratories, dust particles are formed, which in most cases have a negative effect on the health of those who are exposed to them. The degree of health risk depends on the composition and concentration of the dust particles and the duration of exposure. Dust consists of solid particles smaller than 1 μm to 100 μm in size that may be present in the air. Exposure to inhaled dust fractions, the smallest particles of which do not stop in the nose or airways but penetrate even the smallest alveoli, can lead to a risk of developing occupational pulmonary diseases. This diploma thesis presents the procedures and materials used by dental technicians, basic characteristics of powders and methods of image analysis, including Feret diameter, circle equivalent diameter, convexity, elongation, circularity and particle shapes. As part of the experimental work, sampling of dust particles was performed between processes of manufacturing various dental replacements with a personal sampler EGO PLUS TT. The first sampling was performed using a ventilation device and the second without the use of a ventilation device. The analysis of the dust particle composition was performed according to ISO 13322-1: 2014 with a field emission gun scanning electron microscope Thermo Fischer Scientific Quattro S. The analysis has shown that the most common dust particles were of alloy origin, most of which oxidized.

• Keywords: dust particles, dental laboratory, sampling, analysis, geometry, composition.