Table 1.

Description of the four groups in this study.

Group	Toothpaste	Manufacturer	Main ingredient
C	Control group	n/a	Deionized water
R	REALCaP®	REALBONE Technology, Kaohsiung, Taiwan	Dicalcium phosphate with nanocrystals
B	BioRepair®	Coswell S.p.A., Funo di Argelato, Italy	Zinc hydroxyapatite
S	Sensodyne®	Neocosmed, Ladlumkaew, Thailand	Calcium sodium phosphosilicate, Sodium fluoride