Periapical abscess

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Tooth #5, the upper right first premolar, after extraction. The two single-headed arrows point to the CEJ, which is the line separating the crown (in this case, heavily decayed) and the roots. The double headed arrow (bottom right) shows the extent of the abscess that surrounds the apex of the palatal root.
Tooth #5, the upper right first premolar, after extraction. The two single-headed arrows point to the CEJ, which is the line separating the crown (in this case, heavily decayed) and the roots. The double headed arrow (bottom right) shows the extent of the abscess that surrounds the apex of the palatal root.

A periapical abscess is the result of a chronic, localized infection located at the tip, or apex, of the root of a tooth. To achieve resolution, endodontic therapy must be performed to debride the root canalor canals and remove pathogens.

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Endodontology
Diagnostic tests
Electric pulp test - Thermal test - Percussion test
Pulpal Diagnosis
External resorption - Internal resorption - Irreversible pulpitis - Reversible pulpitis - Necrotic pulp - Pink tooth of Mummery
Periapical Diagnosis
Acute apical periodontitis - Chronic apical periodontitis - Perio-endo lesion - Fistula - Periapical abscess - Phoenix abscess - Vertical root fracture
Anatomy
Apical foramen - Pulp - Pulp chamber - Root canal
Armamentarium and material
Amalgam - Apex locator - Files and reamers - Gutta-percha - Dental dam - Rotary technology - Sodium hypochlorite - Silver points - Eucalyptol - Saline - EDTA
Endodontic procedures
Other specialties