Changes

==Periapical Lesions==

==Periapical Lesions==

[[File:Periapical-abscess.jpg|200px|right|thumb|Periapical lesion]]

[[File:Periapical-abscess.jpg|200px|right|thumb|Periapical lesion]]

Pathology in the area surrounding the apex of a root, i.e. periapical pathology, is most commonly a sequel to chronic pulpitis or pulp necrosis. Initially there is inflammation of the apical periodontal ligament. If untreated, the apical periodontitis progresses to involve the surrounding bone, resulting in destruction of the bone, which is replaced by soft tissue. This is evident as an apical rarefaction on a [[Radiographic Interpretation of Endodontic Disease - Small Animal|radiograph]]. The soft tissue may be granulation tissue (periapical granuloma), cyst (periapical or radicular cyst) or abscess (periapical abscess). <font color="red">Pic E7</font color>

Pathology in the area surrounding the apex of a root, i.e. periapical pathology, is most commonly a sequel to chronic pulpitis or pulp necrosis. Initially there is inflammation of the apical periodontal ligament. If untreated, the apical periodontitis progresses to involve the surrounding bone, resulting in destruction of the bone, which is replaced by soft tissue. This is evident as an apical rarefaction on a [[Radiographic Interpretation of Endodontic Disease - Small Animal|radiograph]]. The soft tissue may be granulation tissue (periapical granuloma), cyst (periapical or radicular cyst) or abscess (periapical abscess).

==Clinical Signs==

==Clinical Signs==