Hello,
Toothpaste is just a medium to clean the plaque from the tetth.
If the child has cavity in his/her teeth those cannot be reversed with the use of toothpaste.
If there is pain associated with any of the tooth, it needs to be evaluated properly then decision needs to be taken about RCT is required or any other procedure is required.
Next Steps
X-ray needs to be taken for the tooth which is having pain which will help in diagnosis & further treatment planning.
Health Tips
Get evaluated sooner than later