Periapical pathology PAP periapical abscess granuloma periodontal cyst

Periapical pathology (PAP): periapical abscess, granuloma, periodontal cyst, radicular cyst, residual (retained) cyst, complex odontoma, apical scar, cementoma (Periapical cemental dysplasia) stage I, II & III, • By Mike Lin

Periapical Abscess A periapical abscess is a collection of pus at the root of a tooth, usually caused by an infection that has spread from a tooth to the surrounding tissues.

Granuloma It is a localized mass of chronic inflamed granulaiton tissue at the apex of a non vital tooth, due to pulp death & necrosis.

Periodontal cyst non-inflammatory developmental cyst that arises from the epithelial post-functional dental lamina, which is a remnant from odontogenesis. It is more common in middle-aged males.

Radicular cyst A radicular cyst is generally defined as a cyst arising from epithelial residues (cell rests of Malassez) in the periodontal ligament as a consequence of inflammation, usually following the death of the dental pulp.

Residual (retained) cyst residual cyst is used most often for retained radicular cyst from teeth that has been removed. Residual cysts are among most common cysts of the jaws.

Complex odontoma Tooth components are less well organized: toothlike structures are not formed.

Apical scar An apical scar is a scar that is found at the apex of a tooth from dense connective tissue. It is generally found after there has been a surgical procedure or endodontic treatments.

Cementoma (Periapical cemental dysplasia) stage I, II & III, Cementoma (stage 1) The involved tooth is vital and often painful. First appears as Fibrous tissue stage.

Cementoma (Periapical cemental dysplasia) stage I, II & III, Cementoma stage 2 Teeth are vital. Single or multiple circumscribed lesions at the apices of the teeth. Most Frequently involved the anterior mandibular region. Female > Male. No need for treatment

Cementoma (Periapical cemental dysplasia) stage I, II & III, Cementoma Stage III Multiple circumscribed radiopaque lesion at the apices of the teeth

Reference • Garg, E. (2015, April 08). Periapical pathology. Retrieved from https: //www. slideshare. net/ektagarg 11/periapical-pathology • Iannucci, J. M. , & Howerton, L. J. (2017). Dental radiography: Principles and techniques. St. Louis, MO: Elsevier/Saunders. • Neville, B. W. (2016). Oral and maxillofacial pathology. St. Louis: Elsevier.