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Hybrid Impant - Supported Overdentures in Maxilla
Frolo, Mária ; Zicha, Antonín (advisor) ; Neméth, Tibor (referee) ; Šafářová, Marie (referee)
The loss of teeth in the upper jaw is a clear handicap for patients. There are several options for rehabilitating edentulous patients, and choosing the right course of action can be a challenge even for an experienced dentist. Rehabilitation with implant-supported hybrid restoration can offer patients with moderate to severe alveolar ridge resorption significantly better mechanical properties, such as stability of the restoration with a retention rate approaching that of the fixed alternative and, related to this, greater confidence in speech and food processing and, due to the reduction of the palate of the removable restoration compared to the conventional removable restoration, improved taste perception. In contrast to the fixed alternative, the hybrid implant-supported denture places less demand on both the position and number of dental implants, which avoids complicated hard and soft tissue surgical reconstruction. This leads to considerable financial and time savings. At the same time, the removable alternative can be used with particular advantage in patients with bruxism, as it allows for easy removal of the restoration at night and thus reduces the risk of overloading the implants. This dissertation is divided into theoretical and practical parts. In the theoretical part, the current...
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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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