Resident: Roberts
Date: 2/23/11
Article title: Color and Surface Temperature Variation During Bleaching in Human Devitalized Primary Teeth: An In vitro Study
Author: Gontijo, Isa
Journal: Journal of Dentistry for Children
Volume: 75:3
Year: 2008
Purpose: The purpose of this article was to study two different whitening techniques in primary teeth. An assessment regarding color and temperature surface variation, during dental bleaching using different catalytic sources would be performed.
Method: Twenty one human upper central deciduous incisors were used for the study. They were darkened in human blood for a period of 21 days( didn’t specify where they got the blood!), they were randomly distributed into 2 groups according to bleaching source of activation: (1) a diode laser group, (2) a halogen lamp group. The bleaching process was performed according to manufacturers guidelines. The color was assessed by spectrophotometry and the VITA scale before and immediately after tooth whitening. A thermographic camera was used to register the rise in temperature and the radicular surface during bleaching.
Results/conclusion; There was no significant difference for temperature variation. The of a diode laser and halogen lamp both promoted whitening in devitalized primary teeth in vitro. As a catalytic source of energy the diode laser, with the applied parameters, promoted a smaller temperature increase compared to the halogen lam during the bleaching procedure on non vital primary teeth.
Assessment: Results were vague and did not give alot of practical application to clinical dentistry.
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