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Properties of prosthodontic materials
Vavřičková, Lenka ; Dostálová, Taťjana (advisor) ; Bartoňová, Marie (referee) ; Zicha, Antonín (referee)
Summery Properties of Prosthodontic Materials Background: Dental ceramics and dental alloys have been found to be the most suitable material for prosthetic restorations. The biological inertness of ceramics is considered to be the best among all dental materials. The aim of this study was to determine the level of corrosion and cytotoxic influence on the cell line of mouse fibroblasts of selected dental materials. Methods: In total, 11 types of ceramic materials and 6 types of dental alloys have been chosen for the analysis. The composition of ceramic materials was qualitatively evaluated by X-ray spectrometry. For evaluation of a corrosive behaviour in vivo, presence of released ions in saliva of tested individuals by mean GT-AAS was valuated. For evaluation of a corrosive behaviour in vitro, leaching in hydrochloric acid was used. Extracts were analysed by mean ICP OES and ICP MS. The cytotoxic influence of the materials on the cell line of mouse fibroblasts NIH 3T3 was monitored (direct contact test, extract test). Results: The study of dental alloys corrosive behaviour in vivo determined, that chromium release depends on the dental alloy composition and the time after the denture delivery. The nickel release depends only on the time of delivery. In extracts, measurable amounts of sodium, magnesium,...
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Properties of prosthodontic materials
Vavřičková, Lenka ; Dostálová, Taťjana (advisor) ; Bartoňová, Marie (referee) ; Zicha, Antonín (referee)
Summery Properties of Prosthodontic Materials Background: Dental ceramics and dental alloys have been found to be the most suitable material for prosthetic restorations. The biological inertness of ceramics is considered to be the best among all dental materials. The aim of this study was to determine the level of corrosion and cytotoxic influence on the cell line of mouse fibroblasts of selected dental materials. Methods: In total, 11 types of ceramic materials and 6 types of dental alloys have been chosen for the analysis. The composition of ceramic materials was qualitatively evaluated by X-ray spectrometry. For evaluation of a corrosive behaviour in vivo, presence of released ions in saliva of tested individuals by mean GT-AAS was valuated. For evaluation of a corrosive behaviour in vitro, leaching in hydrochloric acid was used. Extracts were analysed by mean ICP OES and ICP MS. The cytotoxic influence of the materials on the cell line of mouse fibroblasts NIH 3T3 was monitored (direct contact test, extract test). Results: The study of dental alloys corrosive behaviour in vivo determined, that chromium release depends on the dental alloy composition and the time after the denture delivery. The nickel release depends only on the time of delivery. In extracts, measurable amounts of sodium, magnesium,...
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