Table 2: Group Descriptions and IDs of Eroded Enamel Specimens Evaluated in this Study

Group Description	Group ID
Initially eroded enamel (30 minutes, 1% citric acid) treated with SS 1	SS 1 – 30
Initially eroded enamel (120 minutes, 0.3% citric acid) treated with SS 1	SS 1 – 120
Initially eroded enamel (30 minutes, 1% citric acid) treated with SS 2	SS 2 – 30
Initially eroded enamel (120 minutes, 0.3% citric acid) treated with SS 2	SS 2 – 120