08/01/2026
Because X-ray interpretation is now extremely important in the exam, I’ve made this one slide to make things clear and simple for you.
1) Dentigerous Cyst
• Location: Impacted tooth
• Cause: Reduced enamel epithelium
• X-ray: Unilocular pericoronal RL
• Intraoral: Missing tooth
• Types: Central, lateral
• Management: Enucleation
2) Odontogenic Keratocyst (OKC)
• Location: Posterior mandible/ramus, anterior possible
• Cause: Dental lamina remnants
• X-ray: Well-defined RL
• Intraoral: Minimal expansion
• Types: Sporadic, syndromic
• Management: Enucleation + follow-up
3) Cemento-osseous Dysplasia
• Location: Anterior incisors or premolar region
• Cause: Reactive fibro-osseous
• X-ray: RL → mixed → RO
• Intraoral: Vital teeth
• Types: Periapical, focal, florid
• Management: Observe
4) Odontoma
• Location: Anterior maxilla or posterior mandible/premolar
• Cause: Hamartoma
• X-ray: RO mass + RL rim
• Intraoral: Delayed eruption
• Types: Compound, complex
• Management: Excision
5) Central Giant Cell Granuloma
• Location: Anterior mandible, midline crossing
• Cause: Reactive/unknown
• X-ray: Uni- or multilocular RL
• Intraoral: Bony expansion
• Types: Aggressive, non-aggressive
• Management: Curettage
6) Ameloblastoma
• Location: Posterior mandible
• Cause: Odontogenic epithelium
• X-ray: Multilocular soap-bubble
• Intraoral: Expansion, root resorption
• Types: Solid, unicystic, peripheral
• Management: Resection
7) Metastatic Mandibular Lesion
• Location: Mandibular body
• Cause: Distant primary malignancy
• X-ray: Moth-eaten RL
• Intraoral: Paraesthesia
• Types: Lytic, blastic
• Management: Oncology referral
8)Fibrous Dysplasia
• Location: Posterior mandible
• Cause: Developmental bone disorder
• X-ray: Ground-glass
• Intraoral: Bony expansion
• Types: Monostotic, polyostotic
• Management: Observe/contour
Kind regards,
Dr. Adam Bedo
Australian registered dentist
Founder of Australian Dental Academy (Melbourne)
Founder of Westmead Dental Academy(Sydney)
