1. IN THE NAME OF GOD

2. Odontogenic cysts and tumors
We will talk about
Odontogenic cysts and tumors
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4. Dentigerous cyst Follicular cyst Most common 20%
Seperation follicule from eround the crown
Pathogenesis is uncertain
Accumulation of fluid:reduced enamel epithelium and tooth crown
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5. Clinical features
Mandibular third molar> maxillary canine>maxillary third molars>mandibular second premolars
years
Male >
Withes > blacks
If infected: pain &swelling
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7. Radiographic features
Unilocular radiolucent
Well defined
Radiolucency should be at least 3-4 mm
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8. Cyst to crown relationship
Central
lateral
circumfrential
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11. Histopathology
Noninflamed
Inflamed
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14. Treatment and prognosis
Removal of the unerupted tooth
Prognosis is excellent
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16. Eruption cyst Eruption hematoma
Soft tissue analogue of dentigerous cyst
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17. Clinical features Soft translucent swelling <10 years
First permanent molars,maxillary incisors
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19. Histopathology
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20. Treatment and prognosis
no treatment
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21. Odontogenic keratocyst
Rest of dental lamina
Growth may be not related to unknown factors
3-11 % of all odontogenic cyst
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22. Clinical features Infancy to old age 60% in 10-40 years
60-80% in mandibule
Small are asymtomatic
Large :pain,swelling and drainage
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24. Radiographic features
Well defined radilucent
25-40% with unerupted teeth
Resorption is less common
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27. Histopathology
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28. Treatment and prognosis
Enucleation and curettage
Recurrence 5-62%
Recurrence >mandibule
Prognosis is good
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30. Orthokeratinized odontogenic cyst
7-17% of all kerationcyst
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31. Clinical features Young adults 2:1 male to female
2:1 mandibule to maxilla
Posterior>
Unilocular radiolucency
1-7 cm diameter
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33. Histpathology
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34. Treatment and prognosis
Enucleation &curettage
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35. NEVOID BASAL CELL CARCINOMA SYNDROME
Gorlin syn
Mutation PTCH (patched),tumor suppressor gene
Multiple basal cell carcinoma
Odontogenic keratocyst
Intra cranial calcification
Rib and vertebral anomalies
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36. Clinical features 1
Variability in expressivity of nevoid basal cell carcinoma syn
Face:frontal & temproparietal bossing,eyes widely seperated,mild mandibular prognatism
Basal cell carcinoma,second & third decades
In nonexposed area
Few to many hundreds
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38. Clinical features 2 Palmar & planter pits Ovarian fibromas
Skeletal abnormalies:bifid ribs or splayed ribs
Kyphoscoliosis
Calcification falx cerebri
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41. Jaw cysts Present in at least 75% patients Multiple
Patient’s age is younger
1/3 solitary at initial presentation
1-20 years additional cyst developed
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43. Histopathology
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44. Treatment & prognosis Prognosis depends on behavior of skin tumors
Jaw cyst :enucleation
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46. Thanks for your attention
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