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. 2021 Nov 29;14(23):7295. doi: 10.3390/ma14237295

Table 1.

Release of fluoride ions (ppm/mg) from 5%FAp + polymer and 2%FAp + polymer materials into saline solution (0.9% NaCl).

Time 5%FAp + Polymer (ppm/mg)
Mean ± SD
2%FAp + Polymer (ppm/mg)
Mean ± SD
1 h 0.0007 ± 0.0006 0.0004 ± 0.0001
3 h 0.0005 ± 0.0002 0.0008 ± 0.0002
24 h 0.0011 ± 0.0003 0.0014 ± 0.0003
48 h 0.0026 ± 0.0010 0.0005 ± 0.0001
72 h 0.0008 ± 0.0004 0.0014 ± 0.0001
96 h 0.0006 ± 0.0002 0.0007 ± 0.0001
1 week 0.0003 ± 0.0001 0.0003 ± 0.0001
2 weeks 0.0010 ± 0.0002 0.0008 ± 0.0001
3 weeks 0.0017 ± 0.0008 0.0009 ± 0.0002
4 weeks 0.0008 ± 0.0003 0.0005 ± 0.0001
5 weeks 0.0006 ± 0.0002 0.0005 ± 0.0001
6 weeks 0.0007 ± 0.0002 0.0013 ± 0.0004
7 weeks 0.0008 ± 0.0005 0.0006 ± 0.0001
8 weeks 0.0017 ± 0.0001 0.0017 ± 0.0001
9 weeks 0.0025 ± 0.0006 0.0040 ± 0.0011
10 weeks 0.0099 ± 0.0009 0.0021 ± 0.0005
11 weeks 0.0132 ± 0.0109 0.0041 ± 0.0008
12 weeks 0.0013 ± 0.0001 0.0121 ± 0.0063
Cumulative release of F—ions (ppm/mg) 0.0407 ± 0.0165 0.0341 ± 0.0081
p-value
(ANOVA for dependent samples)
<0.0001 <0.0001
Mean ± SD 0.0023 ± 0.0014 0.0019 ± 0.0013
5%FAp + polymer vs. 2%FAp + polymer (Student-t test) 0.637