The erosive effects of saliva following chewing gum on enamel and dentine: an ex vivo study.

Objectives: The primary objective was to determine the erosive effect of expectorated saliva, following chewing acidic gum, on enamel and dentine samples, using a non-acidic gum as a negative control. Secondary objectives were to determine the effect of brushing enamel and dentine samples and the effect of individual saliva pH and buffering.

Design: A single-centre, single-blind, placebo-controlled, two-way crossover study.

Comparative stain removal properties of four commercially available denture cleaning products: an in vitro study.

Objectives: Formulations of commercially available denture cleaners vary widely. Unfortunately, comparative data to suggest which products are the most effective can become invalid as newer products are introduced or formulations are changed. The aim of this in vitro study was to measure the stain removal properties of four currently available denture cleaners.

Teaching dental pain with and without underlying oral physiology: learning implications.

This study investigated whether teaching undergraduate dental students the diagnosis and management of acute dental pain alongside the underpinning oral physiology helped them to understand the topic better than teaching them acute dental pain as a separate entity. Each of three clinical years of dental students at the same dental school was taught in two groups. Each group was taught the signs/symptoms of five acute dental pain conditions by the same member of the staff.

Evaluation of the strength and radiopacity of Portland cement with varying additions of bismuth oxide.

Aim: To study the effect of addition of various proportions of bismuth oxide on compressive strength and radiopacity of Portland cement.

Methodology: The compressive strength of white Portland cement and cement replaced with 10, 15, 20, 25 and 30% bismuth oxide was evaluated by testing cylinders 6 mm in diameter and 12 mm high. Twelve cylinders were tested for each material under study.

Denture cleansers, soft lining materials and water temperature: what is the effect?

Aim: To investigate the effect of water temperature, in association with four denture cleansers, on the colour and surface roughness of five soft lining materials.

Method: Two silicone soft lining materials (Molloplast B and Sofreliner) represented the heat-cured, laboratory-based and chairside materials that are available. The wide range of chairside, acrylic resin-based, temporary soft lining materials was represented by Coe-Soft, Viscogel and Eversoft.