Periapical pocket cyst 3D visualization: a hidden threat to your oral health A pocket cyst, also known as a periapical pocket cyst, is a type of periapical cyst that remains connected to the root canal of an infected tooth. It forms as a result of chronic apical periodontitis, when bacterial infection and inflammation lead to the destruction of periapical tissues. 🔬 Inside the cyst, a cavity lined with epithelial cells fills with fluid, inflammatory exudate, and sometimes bacterial colonies. Un