Dental According to WHO classification of periradicutar diseases, code number category K04.4 is A Acute apical periodontitis B Chronic apical periodontitis C Periapical abscess with sinus D Periapical abscess with sinus to maxillary antrum 💡 Explanation According to WHO classification of periradicutar diseases, code number category K04.4 is ✓ Correct Answer: A. Acute apical periodontitis