Dual-species biofilms of and exhibit more biomass and are mutually beneficial compared with single-species biofilms.

: () and () are found in biofilms of early childhood caries. To characterize dual- and single-species biofilms of and formed on saliva-coated hydroxyapatite discs in the presence of sucrose. Evaluation of biofilms included biochemical [biomass, proteins, matrix's water-soluble (WSP) and alkali-soluble (ASP) polysaccharides, microbiological, 3D structure, gene expression, and stress tolerance analyses.

Physical properties of artificial teeth after immersion in liquid disinfectant soaps.

Purpose: To evaluate the hardness, roughness and color stability of artificial teeth after immersion in liquid disinfectant soaps.

Methods: Artificial teeth (Vipi Dent Plus, ArtiPlus and Biolux) were divided into four groups (n=15), according to the type of immersion solution: distilled water/control group (DW); liquid disinfectant soap Dettol (SD); liquid disinfectant soap Protex (SP); and liquid disinfectant soap Lifebuoy (SL). The immersion cycles occurred every day, for 8 hours at room temperature in each disinfectant solution, following immersion in distilled water for 16 hours at 37°C.