2. • Tooth pulp : the area of tooth that contain
blood vessels and efferent nerves and divided
into:
1. Pulp chamber
2. Root canal
The normal pulp appear as radiolucent area
in the center of the tooth (radiolucency of
pulp because it contain no minerals within it).
17. Radiographical features:
In initial stages,periapical granuloma show widening
of the
periodontal ligament space of the tooth.
Fully developed lesions usually produce a well
defined
radiolucent area of varying size which appears to be
in continuity with the root apex.
Long standing periapical granuloma may show
varying
degrees of root resorption.
18.
19. • Radiographical features:
Radiographical changes seen are limited to
only slight thickening of the periodontal
ligament space in apex region of the involved
tooth.
While in chronic periapical abscess,
radiograph often reveal small radiolucent
area at the root apex of the involved tooth
with poorly defined margins.
20.
21. Apical Periodontal Cyst
• RADIOGRAPHIC FEATURES:
• Radiolucency – round/ ovoid with a narrow
opaque margin which is continuous with
lamina dura.
• In long standing cyst bone resorption of
affected teeth & occasional resorption of adj.
teeth may be seen.
22.
23.
24. • It presents a well defined,spherical
shaped,radiolucent area in dentine which
usually continuous with the pulp
• Enlargement of root canal
• Original root canal outline is distored
25.
26.
27. Calcifications presenting as distinct intra-
chamber (or less often intra-canal)
radiopacities are known as pulp stones
28. The shape of the invagination varying from a
narrow and undilated fissure to a
tear-shaped loop pointing towards the main
body of the pulp