Reductions in stress values were observed for the model with the anatomical preparation and modified infrastructure (ACM). The stress distribution in the flat models was similar to that of their respective anatomical models. The modified design of the zirconia coping reduces the stress concentration at the interface with the veneer ceramic, and the simplified preparation can exert a stress distribution similar to that of the anatomical preparation at and near the load point, when load is applied to the center of the crown. “
“The aim of this study was to evaluate the effect of 1% sodium hypochlorite (H1%) and 4% chlorhexidine gluconate (CG4%) on the adhesion
of Candida albicans to denture base acrylic resins, as well as to verify the effect of the acquired salivary pellicle (ASP) formation on this process. A total of 300 acrylic specimens were immersed in distilled Selleckchem Epacadostat water (control) (n = 100), H1% (n = 100), or CG4% (n = 100) for 30 days. Twenty specimens were used Pexidartinib in each experimental period (0, 1, 7, 15, 30 days). At the end of disinfection testing periods, 10 specimens of each group
were exposed to human whole saliva to simulate ASP formation, and then all specimens were incubated with C. albicans ATTC 90028. Microorganism adhesion was analyzed by fluorescence microscopy, after staining with Acridine orange. In the 30th disinfection cycle in relation to baseline, the H1% or CG4%, without ASP formation, reduced the C. albicans adhesion by approximately 80%; however, with ASP, this reduction after disinfection with H1% was higher (88%). The presence of ASP resulted Interleukin-2 receptor in higher reduction of adhered fungal cells in comparison to resin without ASP, at the 1st H1% or CG4% disinfection cycle, as well as at 30th H1% disinfection cycles. Our results suggest that the presence of saliva might influence the adhesion of C. albicans and improve the effectiveness of methods to reduce fungal adhesion. “
“Purpose: The aim of this study was to evaluate the diffusion of 2-Hydroxyethyl methacrylate (HEMA) from resin
cement through dentin both affected and unaffected by caries through high-performance liquid chromatography (HPLC) at two time intervals. Materials and Methods: Ten freshly extracted restoration-free, caries-free and ten extracted carious human third molar teeth were used in this study. Standardized box-shaped Class I inlay cavities (6 mm long, 3 mm wide, 2 mm deep) were prepared in all teeth with a high-speed handpiece mounted on a standard cavity machine. In teeth affected by caries, after preparation, the remaining carious lesions were removed, with their removal guided by a proprietary caries detector dye. The remaining dentin thickness (RDT) between the pulpal wall of the cavity and the roof of the pulp chamber was measured at multiple points for each tooth so that groups of 10 teeth each were prepared with RDT 1.2 ± 0.5 mm.