Changes

An untreated periapical abscess can lead to complications such as [[osteomyelitis]] and cellulitis through spread of the infection. 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. A fistulous tract opening on the skin or oral mucosa may develop.

==Combined [[Periodontal Conditions|Periodontic]] and Endodontic Lesions==

==Combined [[Periodontal Conditions|Periodontic]] and [[Endodontic Conditions - Small Animal|Endodontic Lesions]]==

There are possible pathways of communication between the pulp and the periodontium. These are denuded dentine tubules, lateral and/or accessory pulp canals, and at the apical foramen. Consequently, a periapical lesion may have a periodontal origin and a periodontal type lesion may originate from the pulp. Another possibility is that a lesion is the result of a combination of endodontic and periodontal pathology. The lesions are classified according to aetiology as follows:

There are possible pathways of communication between the pulp and the periodontium. These are denuded dentine tubules, lateral and/or accessory pulp canals, and at the apical foramen. Consequently, a periapical lesion may have a periodontal origin and a periodontal type lesion may originate from the pulp. Another possibility is that a lesion is the result of a combination of endodontic and periodontal pathology. The lesions are classified according to aetiology as follows: