Surface properties and bacterial adhesion of bulk-fill composite resins.

Objectives: The aim of the present study was to evaluate the Streptococcus mutans and Streptococcus mitis adhesion and related surface properties of bulk-fill resin composite.

Methods: Four novel bulk-fill composite with different composition were used; Sonic Fill-2 (KSF), Filtek BulkFill (FBF), Admira Fusion X-tra (AFX), Beautifil Bulk Restorative (SBB) and a control group (glass) were included in the study. After standardized surface polishing procedure, surface properties of composite specimens were evaluated using surface roughness (SR) measurements by a profilometer, hydrophobicity and surface free energy (SFE) analyses, elemental and topographic analyses by SEM-EDS.

Discoloration and translucency changes of CAD-CAM materials after exposure to beverages.

Statement Of Problem: Color and translucency changes of recently introduced composite resin blocks after long-term exposure to various staining agents have not been fully investigated.

Purpose: The purpose of this in vitro study was to evaluate the color stainability and translucency changes of computer-aided design and computer-aided manufacturing (CAD-CAM) materials immersed in beverages with staining potential.

Material And Methods: Three types of CAD-CAM blocks were used: 3M Lava Ultimate (LU), GC Cerasmart (CS), and VITA Enamic (VE).

Retracted: Postoperative pain after irrigation with Vibringe versus a conventional needle: a randomized controlled trial.

The following article from International Endodontic Journal, 'Postoperative pain after irrigation with Vibringe versus a conventional needle: a randomized controlled trial' by D. Bilgili, S. Yilmaz, A.

Bayesian framework for parametric bivariate accelerated lifetime modeling and its application to hospital acquired infections.

Infectious diseases that can be spread directly or indirectly from one person to another are caused by pathogenic microorganisms such as bacteria, viruses, parasites, or fungi. Infectious diseases remain one of the greatest threats to human health and the analysis of infectious disease data is among the most important application of statistics. In this article, we develop Bayesian methodology using parametric bivariate accelerated lifetime model to study dependency between the colonization and infection times for Acinetobacter baumannii bacteria which is leading cause of infection among the hospital infection agents.

A new method of testing for Hardy-Weinberg equilibrium and ordering populations.

The assumption of Hardy-Weinberg equilibrium (HWE) among alleles in a nonevolving population is of fundamental importance in genetic studies. Deviation from HWE in a population usually indicates inbreeding, stratification and sometimes problems in genotyping. In populations of affected individuals, these deviations can also provide evidence for association.

Differential oncogenic potential of activated RAS isoforms in melanocytes.

RAS genes are mutated in approximately 30% of all human cancers. Interestingly, there exists a strong bias in favor of mutation of only one of the three major RAS genes in tumors of different cellular origins. NRAS mutations occur in approximately 20% of human melanomas, whereas HRAS and KRAS mutations are rare in this disease.