Odontomes

Odontomes

1. = Harmatomas

   • non-neoplastic, non-infective
   • limited growth potential
   • Developmental malformations

2. Enamel pearl

   • often at furcations
   • Cause = disruption in Hertwig's root sheath
   • Plaque retentive -> localised perio disease

3. Invaginated odontome

   • Dens in dente = tooth within a tooth
   • Most common in cingulum of 2s
   • weak enamel -> pulpitis

4. Evaginated odontome

   • often presents as extra cusp
   • = talon cusp in anteriors
   • Most common in Mongolians & Premolars
   • weak enamel -> pulpitis

5. Complex odontome

   • Irregular mass of all the tooth tissues
   • Presentation
     • Asymptomatic
     • Unerupted tooth
       • Most common
     • Pain, swelling, cyst formation
   • Well-defined radiolucent zone/outline, radiopaque centre
   • Site
     • Mandible > Maxilla
     • Molar region
   • Effects = impede eruption, displace teeth, cortical expansion

6. Compound odontome

   • Composed of denticles (bag of teeth)
   • Nomal tooth structure (pulp within dentine within enamel)
   • Site = Maxillary canine region
   • Treatment = curretage out