EN
Purpose: To assess of prosthetic restorations' hygiene concerning the patients with metal and metal and porcelain crowns compared to the natural dentition. Materials and methods: Eighteen persons with fixed prosthetic restorations were examined. The hygiene of their permanent restorations was sampled with Plaque Test. Results: The value of the fluorescent indicator was highest on the own teeth, lower value was on metal crowns and the lowest value was observed on porcelain and metal crowns. The hygiene instructions resulted in the gradual decrease of the indicator’s value, which was observed during the following control visits. Conclusions: The researches reveal that the dental plaque has the least adhesive properties in relation to fixed prosthetic restorations made of porcelain and the precise instructions considering the hygiene of an oral cavity has a crucial influence on the improvement of the hygiene of the crowns