Perio Anatomy

Question 1

Attached Gingiva Width

Icreases with?

Facial- widest, narrowest

Lingual- narrowest, widest

Answer 1

• Width increases with age
• Facial
  
  • Widest incisors
  • Narrowest premolars
• Lingual mandibular
  
  • Narrowest incisors
  • Widest molars

Question 2

Keratinized Gingiva

Answer 2

Free Gingiva and Attached gingiva

Anything apical ti it is not keratinized

Main difff btw gingiva and mucosa

Question 3

Oral Mucosa 3 Zones

Answer 3

• Masticatory Mucosa
  
  • Tissue of the hard palate and gingiva (covers alveolar process)
• Specialized Mucosa
  
  • Covers dorsum of tongue
• Oral Mucosa Membrane
  
  • Covers remainder of oral cavity

Question 4

Thin Phenotype

Answer 4

Increased recession

More vulnerable to trauma

More inflammation

Less favorable treatment outcomes

Question 5

Interdental Papilla Shape depends on

Answer 5

The contact relationships between adjacent teeth

Width of approximal tooth surfaces

Couse of CEJ

Anteriors- Pyrimidal

POsteriors- Col

Question 6

Col

Answer 6

Concavity seen in contact areas of premolars and molars

Non-keratinized bc not in cotact with anything during mastication

Similar to junctional epithelium

Question 7

Oral Epithelium

Type of cell

Layers (4)

Answer 7

• Keratinized stratified squamous epithelium (keratinocytes)
• Basal layer (basale or germinativum)
• Prickle cell layer (spinosum)
• Granular cell layer (granulosum)
• Keratinized (corneum)

Question 8

2 diff types of keratination of oral epithelium

Answer 8

Orthokeratinized (no nucleus)

Parakeratinized (nuclear remnants)

Question 9

From basal layer to granular layer what increases and what decreases

Answer 9

• Cytoplasmic tonofilaments and number of desmosomes increase
• The number of organelles decrease

Question 10

Where are the 2 layers of basement membrane located

Answer 10

• Lamina Lucida- adjacent basal cells
• Lamina densa- adjacent connective tissue
  
  • anchoring fibers project from lamina densa into CT

Question 11

Junctional Epithelium

Answer 11

• Collar like band of stratified squamous non-keratinized epithelium

Question 12

JE origin during and afer eruption

Answer 12

• Derived from reduced dental epithelium during tooth eruption
• After eruption
  
  • cells of oral epithelium can differentiate into cells of JE
• JE is continously renewed

Question 13

Periodontitis Occurs when

Answer 13

• Junctional epithelium migrates apically down root surface, ;eading to attachment loss
• Viable JE neccessary for pocket formation