Influence of in-office whitening gel pH on hydrogen peroxide diffusion through enamel and color changes in bovine teeth.

Purpose: To assess the influence of in-office whitening gel pH on whitening efficiency.

Methods: Hydrogen peroxide diffusion and color changes on bovine teeth were assessed. Three gels with close hydrogen peroxide concentrations but with various pH levels were tested: Zoom 2 (Discus Dental), Opalescence Endo and Opalescence Boost (Ultradent).

Do on- and off-pump coronary bypass surgery differently affect perioperative peripheral tissue metabolism?

Background: Microdialysis allows the in-vivo assessment of interstitial fluids. We studied the metabolic status of peripheral tissues (skeletal muscle) in patients undergoing coronary artery bypass surgery on- (CABG) or off-pump (OPCAB).

Methods: Twenty patients candidates to elective coronary bypass surgery were randomly assigned to undergo CABG or OPCAB.

Severity of periodontal disease correlates to inflammatory systemic status and independently predicts the presence and angiographic extent of stable coronary artery disease.

Background: Periodontal disease (PD) has been recognized as a risk factor for systemic diseases, but its involvement in the pathogenesis of coronary artery disease (CAD) remains debated.

Objectives: We sought to evaluate the potential relations between severity of the PD, inflammatory response and angiographic lesions extent in patients with stable CAD.

Design: A total of 131 subjects referred to our centre for coronary angiography were evaluated for presence and extension of CAD, then divided into two groups, one with presence of lesions (cases, n = 85) and other one with absence of lesions (controls, n = 46).

Accidental ingestion and aspiration of root canal instruments and other dental foreign bodies in a French population.

Aim: To determine the incidence of aspiration and ingestion of endodontic instruments in France during root canal treatment without using rubber dam.

Methodology: Data was provided by two insurance companies representing 24,651 French general dentists over 11 years. The type and number of accidents per year, the number of dental items involved and the percentage of occurrence of either aspiration or ingestion were reported.

Cytotoxicity of Epiphany and Resilon with a root model.

Aim: To record the cytotoxicity of Resilon and Epiphany (Pentron clinical technologies, Wallingford, CT, USA) using a root model.

Methodology: Thirty teeth with single roots were sectioned at the enamel-cementum junction, the root canals prepared and each root then sterilized before filling with the lateral condensation technique using one of three filling materials (n = 10 per group): Resilon and Epiphany, Sealite (Septodont, Pierre Rolland, Merignac, France) and gutta-percha, Roekoseal Automix (Coltène/Whaledent, Langenau, Germany) and gutta-percha. The roots were stored at 37 degrees C in an incubator to allow for setting of the root filling materials.