Ricerc@Sapienza

BACKGROUND: Our research was focused on the analysis of the antimicrobial and antibiofilm power of two commonly used oral toothpastes containing different concentrations of fluorine. These toothpastes were tested in vitro on deciduous teeth. METHODS: Culture of S. mutans was inoculated in 1 mL of sterile phosphate buffered saline (PBS) with a 5% of toothpaste concentration with 500ppm e1400ppm of fluorine. The ability of the bacteria to form colonies was measured by counting the number of Colony Forming Units (CFU).

BACKGROUND: The purpose of this study is to analyze the effect of two toothpaste, with different fluorine concentrations, on the enamel surface of deciduous teeth. The study was performed in vitro by means of SEM microscopy. METHODS: A selection of 20 deciduous molars was prepared. The teeth were extracted as a result of orthodontic treatments or physiological replacements. The procedures were performed at the UOC of Pediatric dentistry Sapienza University of Rome department of Oral and Maxillo-Facial Science.

BACKGROUND: The aim of the study was to observe in vivo the surface effect of two different toothpastes, available on the market, with different fluorine concentration. The analysis was conducted in vivo on deciduous teeth. METHODS: A selection of 20 deciduous molars, from 20 patients, was prepared. The selected teeth showed no alteration of the enamel. The teeth were extracted as a result of orthodontic treatments or physiological replacements. The procedures were performed at the UOC of Pediatric dentistry Sapienza University of Rome department of Oral and Maxillo-Facial Science.

The fluoride removal efficiency of the commercial product Actifluo (Brenntag) has been evaluated on both real industrial wastewater samples as well as on synthetic wastewaters. This study demonstrates that the treatment with the Aluminum polychloride (PAC) containing Actifluo, after a preliminary precipitation step with Ca(OH)2, improved the efficiency in the fluoride removal. This has been proved on wastewaters coming from four different companies of the south of Italy.

Contamination of groundwater by arsenic due to natural processes is rather common worldwide and hinders its use for drinking water supply. In many cases, arsenic contamination is found together with high levels of vanadium and fluoride. Therefore, more than one type of treatment is required to reduce concentrations of all these contaminants below non-hazardous levels so to make the source drinkable. The present study investigated the uptake capacity of arsenic, vanadium and fluoride by three iron-based adsorbent media differing for particle size, iron content and specific surface.