Odontogenic Mixed & RO Lesions

Question 1

Odontogenic RL or Mixed lesions 5

Answer 1

• Calcifying Odontogenic cyst
• Adenomatoid odontogenic tumor
• Calcifying epithelial odontogenic tumor
• Ameloblastic fibro-odontoma (ALWAYS Mixed)
• Cemento-osseous dysplasia

Question 2

Calcifying Odontogenic cyst (Gorlin Cyst)

Can produce

Can be assoc with 2

Xray 6

Tx

Answer 2

• Can produce a calcified product, making RO areas
• Can be associated with other odontogenic tumors, especially odontomas
• Can be assoc with unerpted tooth
• Xray
  
  • Well defined radiolucent lesion
  • with or without RO areas
  • RO areas are surrounded by RL zone and corticated border
  • Can cause root resorption or divergence of adjacent roots, just like any other odontogenic cysts
  • 30% show radiopacities
  • 30% unerupted tooth
• Tx
  
  • Surgery

Question 3

Calcifying Epithelial Odontogenic Tumor

Can produce

Xray

Tx

Answer 3

• May produce mineralized material
• xray
  
  • Well defined, corticated, Mixed
• Tx
  
  • Remove some normal bone surrounding lesion

Question 4

Adenomatoid Odontogenic Tumor

Can

Demographics

Does not

Has

Xray

Tx

Answer 4

• Can produce mineralized product
• 2/3 tumor
  
  • Females, teenagers, anterior, max, assoc with unerupted tooth
• Does not infiltrate bone
• Has ST capsule
• Xray
  
  • Well defined, corticated
• Tx
  
  • Easily excised

Question 5

Ameloblastic Fibro-Odontoma

Represents

Age

Does not

Xray 1

Tx

Answer 5

• Represents a developing odontoma
• Under the age of 20
• Does not infiltrate bone
• ALWAYS Mixed in xray
• Tx
  
  • Conservative removal

Question 6

Odontogenic Lesions that are radiopaque with a thin radiolucent periphery 2

Answer 6

Odontomas

Cementoblastoma

Question 7

Odontomas

Commonly dx as

Better classified as

Definition

Demo

Assoc with/prevent

Types

Key xray

tx

Answer 7

• Commonly diagnosed odontogenic tumor
• Better classified as hamartoma rather than tumor
• Disorganized growth of enamel, dentin, cementum, and pulpal tissue
• Young patients, slow growing
• May be assoc with dentigerous cyst or prevent tooth eruption
• Types
  
  • Compund: Multiple tooth like structures
  • Complex: Does not resemble tooth
• Xray
  
  • RO area surrounded by RL line
• ​Tx
  
  • ​COnservative surgical removal

Question 8

Hamartoma

Answer 8

• Overgrowth of mature cells/tissue that normally occur in the affected part, but disorganized
• ex disorganized teeth in jaw: odontoma
• Stop growing when normal tissue stops growing

Question 9

Compound Odontoma

What

found

Xray2

Answer 9

• Multiple tooth like structures
• Typically found in anterior max but can occur anywhere
• Various radiopacities within central region
• Surrounded by RL line

Question 10

Complex Odontoma

what

Found

Xray2

Answer 10

• Does not ressemble tooth
• Typically found in posterior mandible but can occur anywhere
• Various radiopacities within central region
• Surrounded by RL line

Question 11

Cementoblastoma

what is it

symptoms

xray

tx

Answer 11

• Benign neoplasm of cementoblasts
• 65% pain and swelling
• Diagnostic xray app
  
  • RO mass surrounded by RL line then RO line
  • Fused to tooth root and causes partial root resorption
  • Tx
    
    • Surgical removal of tooth and root amputation with removal of lesoin