Table 1. Composition of experimental and control toothpastes used in this study.

Toothpaste (code)	Composition
Eggshell toothpaste (ESTP)	7 g eggshell powder 1 g potato powder 1 g baking soda 1 g oil of clove
Titanium dioxide nanoparticles-containing eggshell toothpaste (TNPs-ESTP)	7 g eggshell powder 1 g potato powder 1 g baking soda 1 g titanium dioxide nanoparticles 1 g oil of clove
Biorepair Fast Sensitive Repair (Biorepair)	Aqua, zinc hydroxyapatite, glycerin, sorbitol, silica, PEG-32, cellulose gum, aroma, sodium myristoyl sarcosinate, sodium methyl cocoyl taurate, citric acid, phenoxyethanol, benzyl alcohol, sodium benzoate