2.2 Pericoronal radiolucencies

1
2.2 Pericoronal radiolucencies

• 2-2-1 Dental Follicle
• 2-2-2 Pericoronitis
• 2-2-3 Paradental Cyst
• 2-2-4 Dentigerous Cyst
• 2-2-5 Mural ameloblastoma
• 2-2-6 AOT

2
2-2-1 Dental follicle

• Well-defined, unilocular,
• round-shaped radiolucence
• A well-corticated margin
• Surround the crown of
• an impact tooth
• Size

3
2-2-1 Dental follicle

• dental folliclea supporting tissue
• in the period of tooth developing
• cap stage?bell stage
• impaction of upper canine

4
2-2-2 Pericoronitis

• locate at distal aspect of lower 3rd molar
• extend from distal aspect of the lower 3rd
  molars crown to the ramus of mandibular bone
• radiolucence
• poor-defined
• surrouned by
• soft tissue (gingiva)
• the crown of tooth 38.

5
2-2-2 Pericoronitis

• Sitedistal aspect of lower 3rd molar
• The space for developing lower 3rd molar is not
  enough.
• Failure degeneration of enamel epithelium
• (??ppt)