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Table 1 Clinical aspects after 3-years of follow-up, comparing to baseline TFI score

From: Clinical changes in the severity of dental fluorosis: a longitudinal evaluation

TFI score at baseline Three-year changes in TFI score
TFI ≥ 1 Teeth Lower Equal Higher
n n (%) n (%) n (%)
TF 1 416 47 (11.3) 185 (44.5) 184 (44.2)
TF 2 416 150 (36.1) 213 (51.2) 53 (12.7)
TF 3 248 102 (41.2) 116 (46.8) 30 (12)
TF 4 4 4 (100.0)
TF 5 33 28 (84.8) 3 (9.1) 2 (6.1)
Total 1117 331 517 269
  1. Frequencies (n) and percentages (%)