Table 1.

Characteristics of the tested toothpastes

Group	Toothpaste composition	Active ingredient description
nHAP	Aqua, Sorbitol, Hydrated Silica, Glycerin, Hydroxyapatite, Cellulose Gum, Sodium Myristoyl Sarcosinate, Sodium Methyl Cocoyl Taurate, Aroma, Xanthan Gum, Stevia Rebaudiana Extract, Anethole, Tetrasodium Glutamate Diacetate, Tocopheryl Acetate, Eucalyptol, o-Cymen-5-ol, Citric Acid, Vitis Vinifera (Grape) Seed Extract, Tannase, Thymol, Limonene.	Weakly crystallized HAP, containing up to 20% of the amorphous phase Primary particles were nanofibers, rounded nanoparticles Primary particle size was 5−50 nm
nZnMgHAP	Aqua, Sorbitol, Hydrated Silica, Glycerin, Zn-Mg-hydroxyapatite, Cellulose Gum, Sodium Myristoyl Sarcosinate, Sodium Methyl Cocoyl Taurate, Aroma, Xanthan Gum,Stevia Rebaudiana Extract, Anethole, Tetrasodium Glutamate Diacetate, Tocopheryl Acetate, Eucalyptol, o-Cymen-5-ol, Citric Acid, Vitis Vinifera (Grape) Seed Extract, Tannase, Thymol, Limonene.	ZnMgHAP aggregates were soft, loose, spherical particles Primary particle size was 40 nm
nFAP	Aqua, Sorbitol, Hydrated Silica, Glycerin, Fluorapatite, Cellulose Gum, Sodium Myristoyl Sarcosinate, Sodium Methyl Cocoyl Taurate, Aroma, Xanthan Gum, Stevia Rebaudiana Extract, Anethole, Tetrasodium Glutamate Diacetate, Tocopheryl Acetate, Eucalyptol, o-Cymen-5-ol, Citric Acid, Vitis Vinifera (Grape) Seed Extract, Tannase, Thymol, Limonene.	Aggregates were soft, loose, spherical particles Primary particle size was 20−40 nm. 1.88% F in dry residue

nHAP = nano-hydroxyapatite, nZnMgHAP = nano-Zn-Mg-hydroxyapatite, nFAP = nano-fluoroapatite