In WHO classification of periradicular diseases code no. KO4.4 represents
WHO classification of periradicular diseases

KO4.4….acute apical periodontitis
KO4.5…chronic apical periodontitis
KO4.6…periapical abscess with sinus
KO4.7…periapical abscess without sinus
KO4.8….radicular cyst
Acute apical periodontitis
Chronic apical periodontitis
Periapical abscess
Radicular cyst