dental orthopedics vs orthodontics

dental orthopedics and orthodontics both are nouns.

Word	Noun	Adjective	Verb	Adverb
dental orthopedics	Yes	No	No	No
orthodontics	Yes	No	No	No

As nouns, dental orthopedics and orthodontics are synonyms defined as:

dental orthopedics and orthodontics: the branch of dentistry dealing with the prevention or correction of irregularities of the teeth

Other synonyms of dental orthopedics include dental orthopaedics, orthodontia, orthodonture.

dental orthopedics (noun)	orthodontics (noun)
the branch of dentistry dealing with the prevention or correction of irregularities of the teeth	the branch of dentistry dealing with the prevention or correction of irregularities of the teeth