periodontaladjective
/ˌper.i.əʊˈdɒn.təl//ˌper.i.oʊˈdɑːn.t̬əl/specializedrelating to the gums (= the pink flesh in the mouth in which the teeth are fixed) and other tissues around the teeth:
Periodontal disease is a bacterial infection of the gums and teeth.
The periodontal ligaments attach to the tooth for stability.