This document discusses pericoronal lesions, which are lesions associated with the crowns of unerupted or impacted teeth. It describes several types of pericoronal radiolucent lesions including follicular spaces, dentigerous cysts, mural ameloblastoma, adenomatoid odontogenic tumors, and calcifying odontogenic cysts/tumors. Dentigerous cysts are the most common pathologic pericoronal radiolucency and usually occur in the mandibular molars, maxillary canines, and mandibular premolars of patients in their second to third decades of life. Mural ameloblastoma and adenomatoid odontogenic tumor

1. Peri-coronal Lesions;
DR Basavaraj T Bhagawati
Prof &Head,DIRDS,
Frdkt,PB,INDIA
Bony lesions,

2. Pericoronal Lesions-Schematic
PC Lesions

3. Pericoroanal lesions
 Pericoronal
radiolucent
lesions
 Pericoronal
radiopaque
lesions
 Mixed
pericoronal
lesions[RL+RO]
PC Lesions

4. Pericoronal r” lucent lesions
 Follicular space
 Dentigerous cyst
 Mural
ameloblastoma
 Adenomatiod
odontogenic tumour
 Calcifying
odontogenic
cyst/tumour
 Ameloblastic Fibroma
 Calcifying odontogenic
cyst/tumour
 Rare
lesions;Odontogenic
cyst and tumours
 Malignant lesions
PC Lesions

5. Pericoronal space/follicular
space
 Crown of unerupted /impacted teeth are
surrounded by a dental follicle
 R/F
 Homogeneous radiolucent halo surrounding
the crown
 Halo has thin radiopaque border representing
the compact bone continous with lamina
dura
PC Lesions

6. Follicular space-
PC Lesions

7. Abnormal follicle
 Radiolucency about 2.5 cms
and poorly defined borders
suggestive of abnormal
follicle
 Dentigerous cyst ??????
PC Lesions

8. Dentigerous/Follicular cyst
 Associated with crown of
unerupted or impacted tooth
 Etiology:
 Acccumalation of fluid
between reduced enamel
epithelium and enamel
surface
PC Lesions

9. PC Lesions

10. Dentigerous cyst
Most common pathologic pericoronal
radiolucency
The teeth most frequently affected are
Manibular molars,max canines,mand.
Promolars and max, molars
Highest incidence during 2nd-3rd decades of life
PC Lesions

11. Dentigerous cyst
PC Lesions

12. PC Lesions

13. Radiographic features
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14. PC Lesions

15. PC Lesions

16. PC Lesions

17. Dentigerous cyst-cbct image
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18. Mural ameloblastoma
 Ameloblastoma that forms
in the wall of a dentigerous
cyst
 Ages:21.5YRS
 M=F
 SITE:Mandibular molars
PC Lesions

19. Mural Ameloblastoma
PC Lesions

20. Adenomatiod odontogenic tumour
 Pathogenesis;
 Residual odontogenic epithelium
 Most AOT are follicular but some
are extra follicular
 C.F.:
 AGE:17-20Yrs
 Sex:F:M-2:1
 Most of the AOT[70%]- with
impacted teeth/walls of
dentigerous cyst
PC Lesions

21.  AOT frequently seen with
max.canines,lateral incisors
and mand premolars
 Most of the AOTs in maxilla
in the anterior portions of
the jaws
PC Lesions

22. PC Lesions

23. PC Lesions

24. Calcifying odontogenic tumour
CEOT-PINDBORG
TUMOUR  Mixed radiolucent and
radiopaque lesion
 Early stages of CEOT are
seen as pericoronal
radiolucent lesion
PC Lesions

25. PC Lesions

26. PC Lesions

27. refff.Books:
PC Lesions
 Differential Diagnosis Of Oral AND
Maxillofacial Lesions By
 N K WOOD
 PW GOAZ
 3rd
 edition

28. Thank u
PC Lesions