“…A second screening, led to the removal of 14 studies, which left a total of 15 studies, and then we removed seven more: two for treating dental phobia through virtual reality exposure therapy (VRET) instead of distraction [ 8 , 9 ], one for being a protocol [ 20 ], one for not measuring DA/Pain as output, although DA is used as a predictor [ 11 ], two for being half-mouth [ 21 , 22 ], and one for lack of enough data for meta-analysis [ 23 ]. This yielded a final sample of eight studies for the analysis ( Figure 1 , Flowchart): seven in children [ 24 , 25 , 26 , 27 , 28 , 29 , 30 ] and one in adults [ 31 ]. It should be noted that six studies in children refer to both anxiety and pain [ 24 , 25 , 26 , 27 , 29 , 30 ], one in children only to anxiety [ 28 ], and the study in adults only to pain [ 31 ].…”