Table 2.

Erosion protocols discriminated by study and frequency of appearance (n).

Solution used for erosion	Studies (n)	References
Citric acid pH range [2.1–3.75]	16	Siqueira et al. [32], Ferreti et al. [33], Krithi et al. [34], Costa et al. [36], Yabuki et al. [37], Zumstein et al. [38], Siqueira et al. [39], Augusto et al. [41], Siqueira et al. [42], Deari et al. [43], Flury et al. [45], Frattes et al. [46], Bergamin et al. [48], Flury et al. [55], Ramos et al. [57], Zimmerli et al. [58]
Coca-Cola, Coca-Cola Light or Coca-Cola Zero	10	Siqueira et al. [32], Murase et al. [35], Siqueira et al. [42], Forgerini et al. [44], Francisconi-dos-Rios et al. [51], Machado et al. [53], Wang et al. [13], Casas-Apayco et al. [54], Lenzi et al. [56], Cruz et al. [59]
Sprite Zero, Sprite Light	2	Maeda et al. [49], Cruz et al. [52]
Orange Juice	2	Giacomini et al. [47], Giacomini et al. [50]
HCl-pepsin (Hydrochloric acid and pepsin)	1	Moda et al. [40]