primary dentition vs teeth

primary dentition and teeth both are nouns.

Word	Noun	Adjective	Verb	Adverb
primary dentition	Yes	No	No	No
teeth	Yes	No	No	No

As nouns, teeth is a hypernym of primary dentition; that is, teeth is a word with a broader meaning than primary dentition:

primary dentition: dentition of deciduous teeth
teeth: the kind and number and arrangement of teeth (collectively) in a person or animal

Other hypernyms of primary dentition include dentition.

primary dentition (noun)	teeth (noun)
dentition of deciduous teeth	the kind and number and arrangement of teeth (collectively) in a person or animal