Table 2.
Surface elemental composition of the experimental groups and vacuum-dried toothpastes (α toothpaste containing Zn-carbonate substituted n-HAp and β toothpaste containing F, Mg, Sr-carbonate substituted n-HAp), as assessed by EDS. Data are presented as mean (±1 SD); different letters indicate, for each element, significant differences between groups (Tukey test, p < 0.05).
| Element | Control Enamel | Control RBC | α Toothpaste | β Toothpaste | Enamel+ α Toothpaste | Enamel+ β Toothpaste | RBC+ α Toothpaste | RBC+ β Toothpaste |
|---|---|---|---|---|---|---|---|---|
| C | 6.19(0.32) c | 33.36(0.49) a | 26.08(2.01) b | 25.53(1.10) b | 5.49(0.75) c | 6.12(0.20) c | 32.77(1.86) a | 33.96(0.34) a |
| O | 38.21(1.38) a,b | 33.04(0.33) c,d | 43.75(3.23) a | 42.69(0.38) a | 40.12(2.93) a,b | 36.06(1.78) b,c,d | 32.89(2.21) d | 32.63(0.60) c,d |
| Ca | 38.71(0.90) a | 0.00(0.00) c | 12.12(2.22) b | 9.80(0.40) b | 36.97(2.30) a | 39.13(0.74) a | 1.26(0.12) c | 0.30(0.13) c |
| P | 16.31(0.45) a | 0.00(0.00) c | 4.95(0.95) b | 4.93(0.42) b | 15.78(1.39) a | 16.59(1.20) a | 0.76(0.17) c | 0.12(0.06) c |
| Al | 0.03(0.04) c | 1.46(0.04) a,b | 0.29(0.05) b,c | 0.32(0.14) b,c | 0.09(0.04) c | 0.07(0.05) c | 1.31(0.78) a,b | 1.87(0.03) a |
| Si | 0.08(0.02) d | 20.50(0.32) a | 9.36(1.81) c | 12.12(0.59) b | 0.49(0.15) d | 0.39(0.04) d | 20.23(0.69) a | 20.24(0.64) a |
| Ba | 0.00(0.00) c | 11.37(0.56) a | 0.00(0.00) c | 0.00(0.00) c | 0.00(0.00) c | 0.00(0.00) c | 10.52(0.39) b | 10.74(0.09) a,b |
| F | 0.00(0.00) b | 0.00(0.00) b | 0.00(0.00) b | 0.18(0.08) a | 0.00(0.00) b | 0.04(0.02) b | 0.00(0.00) b | 0.00(0.00) b |
| Mg | 0.18(0.01) b,c | 0.00(0.00) d,e | 0.00(0.00) d,e | 0.35(0.01) a | 0.13(0.03) c,d | 0.28(0.11) a,b | 0.00(0.00) e | 0.03(0.01) c,d,e |
| Zn | 0.05(0.06) c | 0.00(0.00) c | 0.27(0.05) a | 0.00(0.00) c | 0.17(0.04) a,b | 0.05(0.06) c | 0.09(0.03) b,c | 0.00(0.00) c |
| Sr | 0.00(0.00) c | 0.00(0.00) c | 0.00(0.00) c | 0.93(0.09) a | 0.00(0.00) c | 0.38(0.10) b | 0.00(0.00) c | 0.00(0.00) c |
| Na | 0.02(0.03) d | 0.00(0.00) d | 1.09(0.01) a | 1.38(0.01) a | 0.52(0.06) b,c | 0.71(0.23) b | 0.09(0.10) d | 0.21(0.04) c,d |
| S | 0.00(0.00) b | 0.00(0.00) b | 0.25(0.06) a | 0.30(0.00) a | 0.00(0.00) b | 0.00(0.00) b | 0.00(0.00) b | 0.00(0.00) b |
| Cl | 0.21(0.05) b,c | 0.03(0.02) d | 0.30(0.07) b | 1.08(0.13) a | 0.24(0.03) b | 0.22(0.01) b,c | 0.07(0.01) d | 0.09(0.02) c,d |
| K | 0.00(0.00) c | 0.00(0.00) c | 1.56(0.02) a | 0.92(0.06) b | 0.00(0.00) c | 0.00(0.00) c | 0.07(00.09) c | 0.02(0.00) c |