has characteristic has characteristic periodontitis chronic periodontitis SCTID:5689008 A chronic inflammatory process that affects the tissues that surround and support the teeth. MONDO:0005593 icd11.foundation:1242548497 ICD9:523.4 ICD9:523.40 EFO:0006343 MESH:D055113 ICD10CM:K05.3 periodontitis, chronic NCIT:C35326 chronic