OST Exam 1: Periodontal Fiber Groups (Tyler)

Question 1

List all the fibers that make up the Periodontal Fiber Group:

Answer 1

1. Alveolar Crest
2. Horizontal
3. Oblique
4. Apical
5. Interradicular
6. Sharpey’s Fibers

Question 2

Function of Alveolar Crest Fibers

Answer 2

PFG

resists lateral movement

Question 3

Function of Horizontal Fibers

Answer 3

PFG

opposes lateral forces

Question 4

Function of Oblique Fibers

Answer 4

PFG
absorbs occlusal forces
*largest group

Question 5

Function of Apical Fibers

Answer 5

PFG

resists tipping of the tooth

Question 6

Function of Interradicular Fibers

Answer 6

PFG

resists forces of luxation (pulling out) and tipping

Question 7

Difference between Principal Fibers and Sharpey’s Fibers

Answer 7

PDL
PF: insert into cementum and alveolar bone
SF: terminal portion of principal fibers