Comparison of the effectiveness of professionally delivered and OTC whitening toothpastes. An in vitro study.

Purpose: To evaluate the effectiveness of five whitening toothpastes applied three times a day for 4 weeks.

Methods: 25 human extracted teeth were selected. Two peroxide-based dental bleaching pastes (professionally delivered): Enawhite 2.

In vitro evaluation of the efficacy of two bleaching procedures.

Objective: In vitro comparison of the efficacy of two bleaching procedures, one based on carbamide peroxide (CP) and the other on hydrogen peroxide (HP), simulating clinical conditions.

Study Design: Two groups of 20 teeth in each group were selected. Group A: 22% CP, one hour a day for 21 consecutive days.

Toothguide Training Box for dental color choice training.

The purpose of this study was to evaluate the use of the Toothguide Training Box (TTB) for training dental students in color identification. The seventy-four volunteers who took part in the study attended a seminar on the Vita 3D Master Guide (MG) and the TTB system as well as a demonstration of the equipment before training began. At the end of the training they took the TTB final test.