Table 2 Descriptive statistics of the enamel hardness
From: In vitro study of the potential protection of sound enamel against demineralization
Group | N | Mean (kgf/mm2) | SD | Minimum | Maximum |
|---|---|---|---|---|---|
1 | 10 | 352.5 | ±13.8 | 334.8 | 370.0 |
2 | 10 | 301.6 | ±34.0 | 227.3 | 341.3 |
3 | 10 | 380.5 | ±53.8 | 309.4 | 679.4 |
4 | 10 | 333.6 | ±18.0 | 314.3 | 373.4 |
5 | 10 | 370.7 | ±38.8 | 304.1 | 660.1 |