Efficacy of Dental Bleaching with Whitening Dentifrices: A Systematic Review

Table 1

Reasons for exclusion of “9” articles.

Author, year	Reason for exclusion
Llena et al. 2016 [11]	Use of gel substance associated with dentifrice for enzymatic activation.
Motta et al. 2013 [12]	Abstract only
Forner et al. 2012 [13]	Use of gel substance associated with dentifrice for enzymatic activation.
Raoufi and Birkhed, 2010 [14]	Another method of analysis
Collins et al. 2008 [15]	Crossover study
Yhudira et al. 2007 [16]	Association of different bleaching methods.
Sharma et al. 2004 [17]	Without control group
Soparkar et al. 2004 [18]	Without control group
Gerlach et al. 2004 [19]	Without conventional toothpaste as a control group