Biotransformation enzymes and lung cell response to 2-hydroxyethyl-methacrylate. -

The aim of this in vitro study was to investigate possible involvement of cytochrome P450 (CYP) enzymes in modifying the toxic potential of 2-hydroxyethyl-methacrylate (HEMA). Primary cultures of CYP expressing rat alveolar type 2 cells were exposed to varying concentrations of HEMA. Nuclear translocation of aryl hydrocarbon receptor (AhR) after HEMA exposure (100 μM) was demonstrated by immunocytochemical staining.

Skadelig innhold i skyllevæske og tannkremer? -

Det er kommet spørsmål fra en tannlege som er bekymret over manglende informasjon om innholdet av ulike mulig helseskadelige stoffer i fluor skyllevæske og tannkremer. Dette er et betimelig spørsmål.

Optical characterization of biomaterial/radiation-exposed oral mucosa by reflection spectroscopy -

Previously, we have reported data obtained from near-infrared reflection spectroscopy (NIRS) used to non-invasively monitor tissue changes after optical exposure. The results indicated that oral mucosa may be more sensitive than skin to blue light. In this pilot study, visible data from NIRS (VNIRS) was used to observe differences between exposure groups with respect to the following parameters: pigmentation (melanin index; MI), blood oxygenation (OX) and erythema (erythema index; EI).

Role of bonding agents in the repair of composite resin restorations -

Six commonly used composite resin materials and recommended bonding systems were tested to assess shear bond strength at the interface between aged and new composites with and without bonding. Test specimens were aged in water for 60 d before new composite was placed.

Promotion of Adhesion Between Resin and Silica-coated Titanium by Silane Monomers and Formic Acid Catalyst -

Three bifunctional silane coupling agent monomers and their blends with a cross-linking silane were investigated as six experimental adhesion-promoters in vitro. Three organosilane monomers, 3-methacryloxypropyltrimethoxysilane, styrylethyltrimethoxysilane, and 3-(N-allylamino)propyltrimethoxysilane, were prepared as 1% (v/v) primers and also blended with a cross-linking silane, 1,2-bis-(triethoxysilyl)ethane at 0.5% (v/v), in a 95:5 solution of ethanol in deionized water.