Anatomy Of Periodontium

Question 1

How thick is PDL

Answer 1

0.2-0.4mm

Question 2

What are the demarcations of the oral cavity

Answer 2

From inner surface of lips to beginning of oropharynx

Question 3

What is the oral vestibule

Answer 3

Space between teeth and inner mucosal lining of lips and cheeks

Question 4

Maxilla and mandible have core of less dense cancellous bone wrapped in ____

Answer 4

More dense compact bone

Question 5

Soft palate separates

Answer 5

Oropharynx from nasopharynx

Question 6

Posterior third of tongue is covered in

Answer 6

Lingual papillae: lymphoid bumps that contain immune cells to help fight off pathogens entering mouth

Question 7

Whiat makes up the periodontium

Answer 7

Cementum
Periodontal ligament
Alveolar bone

Question 8

Cementum is thickest at

Answer 8

Root apex and interradicular areas of multi rooted teeth

Question 9

What tooth structure attaches to PDL Sharpey’s fibres

Answer 9

Acellular cementum

Question 10

PDL is reduced in

Answer 10

Non functional and unerupted teeth

Question 11

PDL is increased in

Answer 11

Deciduous teeth and teeth under increased occlusal load

Question 12

What are the types of principal fibres

Answer 12

Alveolar crest
Horizontal 
Oblique 
Periapical
Interradicular

Question 13

How does PDL help to absorb shock

Answer 13

Moderate forces: extravascular tissue fluid forced out of PDL space into adjacent marrow space

Heavy forces: principal fibres

Question 14

Cortical plate is thinner in maxilla or mandible

Answer 14

Maxilla

Question 15

After extraction, wait ____ before placing implant

Answer 15

10-12 weeks