Classification of odontogenic cyst

Classification of odontogenic cyst
Dr.MUTHUKUMARAN.
PREFINAL YEAR PG
DEPT OF ORAL PATHOLOGY & MICROBIOLOGY

Introduction of cyst
Cyst derived from Greek word “KYSTIS”
which means bladder / sac like lesion
John Hunter described a dental cyst in 1774.
27/25/2017
Classification of odontogenic
cyst/Dr.Muthukumaran/ sixth seminar

INTRODUCTION
• A cyst is defined as a pathological cavity mostly but
not always lined by epithelium and containing fluid,
semi-fluid or gasseous contents and which is not
created by accumulation of pus (Kramer,1974)
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Cysts of the jaws
Increased incidence of cysts of the jaws maxilla and mandible in
comparison with other bones of the body is due to
Development of dentition within jaws – odontogenic
epithelial remnants.
Infection or inflammation can reach the jaw easily thru any
pathology involving the tooth
Nature of development of jaws – union of several processes
– entrapment of epithelium
Presence of sinus (maxilla)

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Classification of cysts
Based on location-
Intraosseous
Extraosseous
Based on presence or absence of epithelium
True cyst
pseudocyst

a) TRUE CYSTS: that which is lined by epithelium e.g dentigerous
cyst, radicular cyst etc.
a) PSEUDO CYSTS: not lined by epithelium, e.g. Solitary bone cyst,
Aneurismal bone cyst etc
• Cysts are formed either in bone or in soft tissue.
• When found in bone, they are called central cysts & when found in
soft tissue, they are called peripheral cysts
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ROBINSON’S CLASSIFICATION(1945)
From odontogenic tissue – Periodontal cyst
Radicular or dental root apex type
Lateral type
Residual type
– Dentigerous cyst
– Primordial cyst
From non-dental tissue – Median cyst (median palatal cyst)
– Incisive canal cyst
– Globulomaxillary cyst
Robinson HB. Classification of cysts of the jaws. American Journal of Orthodontics and Oral Surgery. 1945 Jun 1;31(6):A370IN1A373-2A375.
NOT EXPLAINED ABOUT THE EPITHELIUM LINING AND ORGIN.

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THOMA-ROBINSON-BERNIER CLASSIFICATION (1960)
Odontogenic ectodermal epithelial cyst – Follicular cyst Primordial cyst
Dentigerous cyst – Lateral
– Central
– Periodontal cyst Apical
Lateral
– Residual cyst Follicular
Periodontal
– Multiple cyst
– Multilocular cyst
– Polycystoma cyst
- cholesteatoma NOT EXPLAINED ABOUT
DEVELOPMENTAL, AND CONGENITAL

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NOT EXPLAINED ABOUT
EPITHELIAL LINING OF YHE CYST.

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Pindborg & kramer– 1971 :
ODONTOGENIC CYSTS
Developmental:
Primordial cyst(keratocyst)
Gingival cyst
Eruption cyst
Dentigerous (follicular) cyst
Inflammatory:
Radicular cyst.
THEY TALK ABOUT ONLY THE ODONTOGENIC
CYST.

• WHO classification (1971):
Epithelial cysts
Inflammatory:
-- Radicular cyst.
Developmental:
• Odontogenic;
– Primordial cyst
– Gingival cyst
– Eruption cyst
– Dentigerous cyst
• Non-odontogenic
– Nasopalatine duct cyst
– Globulomaxillary cyst
– Nasolabial cyst
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MOST APROPRIATE CLASSIFICATION.
IN FUTURE IT REQUIERED THE UPDATES

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HERE THEY EXPLAINED ALL ASPECTS OF CYST.

• WHO 1992:
Epithelial cysts
1 . Developmental
Odontogenic
– Gingival cyst of infants (Epstein pearls)
– Odontogenic keratocyst (primordial cyst)
– Dentigerous (follicular) cyst
– Eruption cyst
– Lateral periodontal cyst
– Gingival cyst in adults
– Glandular odontogenic cyst; sialo-odontogenic cyst
Non odontogenic
– Nasopalatine duct (incisive canal) cyst
– Nasolabial (nasoalveolar) cyst
2. Inflammatory
• Radicular cyst
– Apical and lateral radicular cyst
– Residual radicular cyst
• Paradental (inflammatory collateral, mandibular infected buccal) cyst .
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Classification of Odontogenic cysts based
on the etiology - Shafer
Development:
Unknown origin but are not the result of inflammatory reaction
• Dentigerous cyst
• Eruption cyst
• Odontogenic keratocyst
• Gingival cyst of new born
• Gingival cyst of the adult
• Lateral periodontal cyst
• Calcifying odontogenic cyst
• Glandular odontogenic cyst
Inflammatory
• Result of inflammation
• Periapical cyst
• Residual cyst
• Paradental cyst.
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Classification by Tissue of origin:
Derived from Rests of Malassez
• Periapical cyst
• Residual cyst
Derived from Reduced enamel epithelium
• Dentigerous cyst
• Eruption cyst
• Derived from Dental lamina (Rests of Serres)
• Odontogenic keratocyst
• Glandular odontogenic cyst
• Gingival cyst of new born
• Gingival cyst of the adult
• Lateral periodontal cyst
• Unclassified
• Paradental cyst
• Calcifying odontogenic cyst.
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Odontogenic cysts:
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Thank you..
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Classification of odontogenic cyst

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