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How to clean your rat's teeth 
Learn about your rat's dental needs. 
Rats do not usually need any dental care, including brushing. Rat molars are located inside of a pouch in the back of their mouths behind a section of gums called the diastema.
A veterinarian has to use a speculum to dilate the pouch that contains the molars, so they are not accessible for brushing. The only visible teeth in your rat's mouth are the yellow or orange colored incisors in the front of his mouth.