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One of the most distinctive characteristics of the Tubulidentata is their teeth.
Instead of having a pulp cavity, each tooth has a cluster of thin, upright, parallel tubes of vasodentin ( a modified form of dentine ), with individual pulp canals, held together by cementum.
The teeth have no enamel coating and are worn away and regrow continuously.
The aardvark is born with conventional incisors and canines at the front of the jaw, which fall out and are not replaced.
Adult aardvarks have only cheek teeth at the back of the jaw, and have a dental formula of:

1.966 seconds.