An untreated periapical abscess can lead to complications such as [[osteomyelitis]] and cellulitis through spread of the infection. <font color="red">( PicE8)</font color> A fistulous tract opening on the skin or oral mucosa may develop. | An untreated periapical abscess can lead to complications such as [[osteomyelitis]] and cellulitis through spread of the infection. <font color="red">( PicE8)</font color> A fistulous tract opening on the skin or oral mucosa may develop. |