Clinical survey of a combined in-office cold light bleaching and nightguard vital bleaching system for tetracycline stained teeth;

Effect of Tree dental whitening gel used in nightguard vital tooth bleaching;

In order to objective detect the state of dental pulp vitality,the technology of laser induled fluorescence was used,base on the principle of the teeth can excited the fluorescence in the short wavelength source irradiation,and have close relate between the number of fluorescence and the dental pulp vitality.

For lack of methods in dental pulp vitality detection,large error and pain to the patient using current ways,a new instrument present in this paper,which based on fluorescence detection.

Objective To investigate the clinical effects of light-cured composite resin for esthetic restoration of vital incisors.