Surface Enamel Remineralization: Biomimetic Apatite Nanocrystals and Fluoride Ions Different Effects

Table 1

XPS analysis of CHA nanocrystals, enamel tooth treated with ortophosphoric acid before and after treatment with either CHA 20 or 100 nm sized nanocrystals and after brushing with toothpaste containing booth CHA or fluoride.

Sample	O (%)	C (%)	Ca (%)	P (%)	N (%)	Si (%)	Na (%)	F (%)	Ca/P
20 nm CHA nanocrystals	50.4	17.6	19.4	12.6	—	—	—	—	1.5
100 nm CHA nanocrystals	48.4	18.0	19.6	13.9	—	—	—	—	1.4
Tooth treated with ortophosphoric acid	30.7	49.4	5.4	5.3	5.9	1.9	1.4	—	1.1
Tooth treated with 20 nm CHA nanocrystals	43.3	27.3	13.4	10.1	2.3	—	1.9	—	1.3
Tooth treated with 100 nm CHA nanocrystals	43.7	26.0	14.8	11.2	1.0	—	1.5	—	1.3
CHA containing toothpaste	30.7	51.9	5.5	4.7	1.6	5.6	—	—	1.2
Fluoride containing toothpaste	20.9	63.3	4.1	1.2	2.0	4.9	—	3.6	3.4