Table 1 Influence of etching time on the depth of the enamel erosion depth [μm]
From: Enamel surface alterations after repeated conditioning with HCl
Conditioning time | 2 min | 2×2 min | 2×3 min | 2×4 min |
|---|---|---|---|---|
Mean | 35.95 | 49.37 | 66.46 | 79.22 |
Standard devation | 10.00 | 11.35 | 18.06 | 19.79 |
Median | 34.11* | 49.36* | 64.28* | 77.56* |
Minimum | 17.75 | 22.52 | 32.79 | 39.91 |
Maximum | 71.34 | 92.47 | 151.51 | 150.58 |
25 % percentile | 28.40 | 41.77 | 54.94 | 66.09 |
75 % percentile | 41.10 | 55.42 | 73.67 | 90.72 |