Abrasivity testing of dentifrices - challenges and current state of the art.

Abrasivity potential of dentifrices is assessed mostly in vitro due to practical, scientific, and ethical reasons. The two most used evaluation methods are based on the measurement of radioactive dentin release or dentin surface profile changes, after simulation of toothbrushing with dentifrices. The radiotracer method known as radioactive or relative dentin abrasivity (RDA) was developed decades ago and is the most frequently used today (the 'gold standard' for many).

Silica as a reference for laboratory dentifrice assessment methods: multiple site collaborative study.

Objective: This collaborative study was designed to collect data from multiple laboratories, using recognized abrasion and cleaning power methods, to assess the functionality, stability, and suitability of three Sident silica abrasives for consideration as references for ISO (International Standards Organization) abrasion and other dentifrice assessment methods.

Methodology: This study included ISO and other physicochemical methods to characterize the abrasive powders, as well as ISO and related abrasion methods--Radioactive Dentin Method, Profilometry, and Copper Gravimetric, and two Cleaning Power methods--to test the functionality of the silica abrasives with the current ISO abrasion reference calcium pyrophosphate.

Results: The outcomes demonstrated that the collaborative study to measure the physicochemical characteristics of three Sident silica abrasive materials, stored at ISO and tropical conditions, found no change in the functionality as measured by these methods over the two-year test period.

Evaluation of dentin abrasion during professional tooth cleaning in an in vitro model.

Objectives: Professional tooth cleaning (PTC) may lead to loss of exposed dentin. The aim of the present study was to determine the absolute loss of dentin during PTC using various product combinations with an in vitro model.

Material And Methods: Dentin specimens (72) were randomly assigned to nine groups.

Why is there and should there be more attention paid to dental erosion?

Fluoride delivered by fluoridation, toothpaste, and mouth rinses, combined with regular preventive professional and personal care, has given us a much better opportunity to keep our teeth for a lifetime. But in contrast to better preventive care, lifestyle changes leading to stress or dietary changes in what and how we drink and eat may adversely affect the esthetics and/or healthy look of our teeth. Surface-enamel wear can be described as the result as well as a chronicle of an individual's life.