Impact of different tongue cleaning methods on the bacterial load of the tongue dorsum.

Objective: To assess the extent and duration of the effect of tongue cleaning procedures on bacterial load on the dorsal surface of the tongue.

Methods: 19 subjects participated in this blinded crossover study. Subjects abstained from oral hygiene, eating and drinking from 22:00 h the previous evening.

Clinical study to compare two in-office (chairside) whitening systems.

The objective of this clinical study was to compare the whitening/bleaching efficacy of two marketed in-office whitening systems: Discus Dental Zoom! Chairside System (25% hydrogen peroxide whitening gel) and Opalescence Xtra Boost Kit (38% hydrogen peroxide whitening gel), using the Vita Shade Guide and chromameter measurements. The study was an examiner-blind, parallel group, randomized and controlled clinical trial conducted in a dental setting. All subjects signed a study consent form prior to admission and were given Crest Regular Toothpaste and an Oral-B 40 straight-handle toothbrush to use during the study.