odontogenic cyst

odontogenic cyst

1. inflammatory

2. developmental

   • primordial cyst
     • congentially missing tooth place
       • mandibular third molar
     • well defined radiolucency
     • asymptomatic
   • calcifying odontogenic cyst
     • gorlin cyst
     • odontomas
     • well defined unilocular radioluceny
     • radiopaque structures within cyst
     • resoption oor displacement
     • cystic lining ghost cells
       • eosiphillic cells no nucleus
     • stratified squamous epithelium
   • eruption
     • eruption hematoma
     • associated with crown
       • first permanent molas
       • deciduuous max / madn central incisor
     • bluish swelling of alveolar ridge
   • lateral periodontal cyst
     • botryoid
       • multilocular variant
     • mandibular canine-premolar
     • histo
       • squamous or cuboidal epithelium
     • thickened plaques
   • dentigerous
     • folicular cyst
     • MOST COMMON
     • CRown of impacted tooth attached at cej
     • third molars, max canines, mandibular 2nd premola
     • lined by non keratinized stratified, columnar epithelium
     • wall of cyst inactive rests of odontogenic epithelium
       • may lead to ameloblastma
   • orthokeratinized odontegnic cyst
     • male young adults
     • mandible
     • mistaken for dentingerous cyst
     • stratified squamous epithelium lined with orthokeratotic surface
   • gingival cyst of adult
     • PRESENT ENTIERLY IN SOFT TISSUE
     • MANDIBULAR CANINE-PREMOLAR ARE OF FACIAL GINGIVA
     • Painlesss
     • dome shaped
     • blue gray bluish in color
     • not seen on radiograph
   • glandular odontogennic cyst
     • mandible
     • anterior mandibe
     • will cross midline
     • un multilocualr radiolucent
     • well defined
     • stratified sqaumos epitheliu
     • columnar or cuboidal cells with cilia
     • goblet ells
     • glanduarl ductlike spaces within epithelium
     • sialoodontogenic cyst
   • gingivial cyst of newborn
     • alvelor mucosa of newbornd and infants
     • small whie multiple papules 2- 3 mm in size
   • odontogenic keratocyst
     • rests of serre
     • third molar ramus area
     • high recurrence rate
     • histopatholgy OKC
       • epithelial surfacy wavy
       • picket fence, palisaded columnar basal cell layer
       • satellite cysts seen in wall
       • OKC: THIN LAYER of parakerotic stratified sqaumos epithelium
     • nevoid basal cell carcinoma syndrome gorlin syndrome
       • multipel OKCs
       • XX
         • PTCH supressor gene on chromosome 9 mutated
       • bifid ribs
       • frontal and tempororoparietal bossing
       • ocular hypertelorism
       • palmar and plantar pitting