Classification of odontogenic cyst

CLASSIFICATION FROM 1945

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

2. Introduction of cyst Cyst derived from Greek word “ KYSTIS” which means bladder / sac like lesion John Hunter described a dental cyst in 1774. 2 25-Jul-17 Classification of odontogenic cyst/Dr.Muthukumaran/ sixth seminar

3. 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) 3 25-Jul-17 Classification of odontogenic cyst/Dr.Muthukumaran/ sixth seminar

4. 25-Jul-17 Classification of odontogenic cyst/Dr.Muthukumaran/ sixth seminar 4 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)

5. 25-Jul-17 Classification of odontogenic cyst/Dr.Muthukumaran/ sixth seminar 5 Classification of cysts Based on location-  Intraosseous  Extraosseous Based on presence or absence of epithelium  True cyst  pseudocyst

6. TRUE CYSTS: that which is lined by epithelium e.g dentigerous cyst, radicular cyst etc. 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 25-Jul-17 6 Classification of odontogenic cyst/Dr.Muthukumaran/ sixth seminar

7. 25-Jul-17 Classification of odontogenic cyst/Dr.Muthukumaran/ sixth seminar 7 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.

8. 25-Jul-17 Classification of odontogenic cyst/Dr.Muthukumaran/ sixth seminar 8 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

9. 25-Jul-17 Classification of odontogenic cyst/Dr.Muthukumaran/ sixth seminar 9

10. 25-Jul-17 Classification of odontogenic cyst/Dr.Muthukumaran/ sixth seminar 10 NOT EXPLAINED ABOUT EPITHELIAL LINING OF YHE CYST.

11. 25-Jul-17 Classification of odontogenic cyst/Dr.Muthukumaran/ sixth seminar 11

12. 25-Jul-17 Classification of odontogenic cyst/Dr.Muthukumaran/ sixth seminar 12

13. 25-Jul-17 Classification of odontogenic cyst/Dr.Muthukumaran/ sixth seminar 13

14. 25-Jul-17 Classification of odontogenic cyst/Dr.Muthukumaran/ sixth seminar 14

15. 25-Jul-17 Classification of odontogenic cyst/Dr.Muthukumaran/ sixth seminar 15

16. 25-Jul-17 Classification of odontogenic cyst/Dr.Muthukumaran/ sixth seminar 16 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.

17. 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 17 25-Jul-17 Classification of odontogenic cyst/Dr.Muthukumaran/ sixth seminar MOST APROPRIATE CLASSIFICATION. IN FUTURE IT REQUIERED THE UPDATES

18. 25-Jul-17 Classification of odontogenic cyst/Dr.Muthukumaran/ sixth seminar 18 HERE THEY EXPLAINED ALL ASPECTS OF CYST.

19. 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 . 19 25-Jul-17 Classification of odontogenic cyst/Dr.Muthukumaran/ sixth seminar

20. 25-Jul-17 Classification of odontogenic cyst/Dr.Muthukumaran/ sixth seminar 20

21. 25-Jul-17 Classification of odontogenic cyst/Dr.Muthukumaran/ sixth seminar 21

22. 25-Jul-17 Classification of odontogenic cyst/Dr.Muthukumaran/ sixth seminar 22

23. 25-Jul-17 Classification of odontogenic cyst/Dr.Muthukumaran/ sixth seminar 23

24. 25-Jul-17 Classification of odontogenic cyst/Dr.Muthukumaran/ sixth seminar 24

25. 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. 25 25-Jul-17 Classification of odontogenic cyst/Dr.Muthukumaran/ sixth seminar

26. 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. 26 25-Jul-17 Classification of odontogenic cyst/Dr.Muthukumaran/ sixth seminar

27. Odontogenic cysts: 27 25-Jul-17 Classification of odontogenic cyst/Dr.Muthukumaran/ sixth seminar

28. Thank you.. 25-Jul-17 Classification of odontogenic cyst/Dr.Muthukumaran/ sixth seminar 28