periodontal vs periodontic

periodontal and periodontic both are adjectives.

Word	Noun	Adjective	Verb	Adverb
periodontal	No	Yes	No	No
periodontic	No	Yes	No	No

As adjectives, periodontal and periodontic are synonyms defined as:

periodontal and periodontic: of or relating to or involving or practicing periodontics

periodontal (adjective)	periodontic (adjective)
of or relating to or involving or practicing periodontics	of or relating to or involving or practicing periodontics