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Wyszukujesz frazę "dental polymers" wg kryterium: Temat


Wyświetlanie 1-3 z 3
Tytuł:
Evaluating the Potential Occupational Hazard of Handling Dental Polymer Products Using the HET-CAM Technique
Autorzy:
Lonnroth, E. C.
Dahl, J. E.
Shahnavaz, H.
Powiązania:
https://bibliotekanauki.pl/articles/90129.pdf
Data publikacji:
1999
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
HET-CAM test
irritation score
dental polymers
occupational hazard
dental personnel
personel dentystyczny
ryzyko zawodowe
personel medyczny
Opis:
The irritation potencies of 8 dental polymer products, used as dental restorative materials, adhesives, or temporary constructions, were tested using the HET-CAM (hen's egg test-chorioallantoic membrane) technique. Liquid and powder components, and extracts of cured and freshly mixed non-cured materials of 5 glass ionomers, 1 bonding, 1 composite, and 1 cold-cured acrylate were examined. Results showed that the liquid component of all products had a strong irritation capacity but powder suspensions and extracts from cured and freshly mixed non-cured materials had no effect on the CAM. Thus, dental personnel who handle liquid and powder manually are exposed to components with a high irritation potential, in contrast to patients who are exposed to the cured and mixed non-cured materials with low irritation potential. This illustrates the importance of safe handling procedures and practices for dental personnel who handle non-cured polymers manually.
Źródło:
International Journal of Occupational Safety and Ergonomics; 1999, 5, 1; 43-57
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fatigue life of polymer dental crown
Autorzy:
Michalski, J.
Stręk, T.
Powiązania:
https://bibliotekanauki.pl/articles/127698.pdf
Data publikacji:
2018
Wydawca:
Politechnika Poznańska. Instytut Mechaniki Stosowanej
Tematy:
fatigue
modal
vibrations
dental crown
polymers
acrylic
finite element method
zmęczenie materiału
modalność
drgania
korona protetyczna
polimery
akryl
metoda elementów skończonych
Opis:
In this article fatigue life of polymer dental crown will be analyzed. Chewing forces occurring in repetitive cycles can lead to fatigue destruction of material. To predict a number of cycles to failure finite element method can be applied and results may be used to improve the design of acrylic dental crowns. Also, the modal analysis will be performed in order to find natural frequencies of the system and prevent destruction from vibrations.
Źródło:
Vibrations in Physical Systems; 2018, 29; 1-8
0860-6897
Pojawia się w:
Vibrations in Physical Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of decontamination procedures on elastic polymeric materials used in dental mouthguards fabrication
Autorzy:
Mańka-Malara, Katarzyna
Panasiewicz, APaulina
Kacprzyk, Milena
Gawryszewska, Monika
Mierzwińska-Nastalska, Elżbieta
Gawlak, Dominika
Powiązania:
https://bibliotekanauki.pl/articles/306323.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
materiały stomatologiczne
polimery
ochraniacze wewnątrzustne
mouthguards
dental material
dental polymers
Opis:
Mouthguards are commonly used in the prevention of head and mouth injuries in many sport disciplines. Elastic polymeric materials used in their fabrication absorb the energy of impact. However, decontamination procedures may cause damage to their surface causing deterioration of their properties and favouring pathogen colonization. The aim of the study was to determine the impact of different cleaning methods on mouthguard materials, surface quality. Methods: The material for the research consisted of 81 samples made from polymeric materials used for custom mouthguard fabrication – Impak, Corflex Orthodontic and Erkoflex. Samples were viewed under a scanning electron microscope after exposure to different cleaning methods. Results: Statistical analysis of tested decontamination procedures and disinfecting agents showed statistically important ( p < 0.05) results for the presence of small and big separated pieces, grooves and holes. Out of all the cases the lowest indicator for occurrence was in the disinfecting spray – Aftermat. Conclusions: Considering the importance of the surface material of the mouthguard, disinfection should be the method of choice for maintaining its hygiene. Impak material samples, cleaned with the Aftermat spray, showed the lowest range of damage.
Źródło:
Acta of Bioengineering and Biomechanics; 2019, 21, 4; 63-71
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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