Table 1 Surface roughness values
Location | Surface roughness (Sa) | Mean difference (95% CI) | P value* | |||
|---|---|---|---|---|---|---|
High fluoride | Low fluoride | |||||
Mean | SD | Mean | SD | |||
Crater | 13.90 | 4.55 | 24.74 | 9.32 | 10.84 (5.14, 16.54) | 0.002 |
Cervical | 10.58 | 5.37 | 11.01 | 6.37 | 0.42 (−4.15, 5.00) | 0.268 |
Middle | 7.838 | 9.72 | 4.17 | 1.35 | −3.67 (−9.06, 1.71) | 0.967 |
Apical | 8.69 | 3.57 | 6.32 | 2.32 | −2.37 (−4.70, −0.03) | 0.108 |
Total | 10.25 | 6.52 | 11.56 | 9.85 | 1.31 (−0.955, 3.568) | 0.255 |