pindexperiodontology./per-ee-oh-don-tol-uh-jee/US // ˌpɛr i oʊ dɒnˈtɒl ə dʒi //牙周病学,牙周学,牙周科,牙周病Definitionsn.noun · 名词1.›periodontics. Level 5More words in p →