When the first teeth start to appear, buy a toothbrush designed for the age of your child, usually this is indicated on the packaging, and gently cleanse the entire tooth without toothpaste. (verywell.com)
The first couple times I used Smile Brilliant, I would see a slight color change on certain parts of my teeth, but not a lasting change and not a change on the entire teeth. (modlychic.com)
Dental x-rays allow us to see the entire tooth (both crown and root) and find lesions under the gumline that otherwise would be missed. (catspecialist.com)