Week 1

Question 1

Periodontium aka and parts

Answer 1

“supporting tissues of teeth / attachment apparatus” - gingiva, PDL, cementum, alveolar bone

Question 2

GCF

Answer 2

[Gingival Cervicular Fluid] wbc, little/none in health!

Question 3

PDL: 5 functions

Answer 3

1. Supportive - tooth in socket 2. Sensory -pain/pressure 3. Nutritive - to cementum/bone 4. Formative - cementoblasts/osteoblasts 5. Remodeling - of alveolar bone in response to pressure

Question 4

Alveolar Bone Proper

Answer 4

cribiform plate - thin layer lines tooth socket. sharpeys fibers embed here

Question 5

Anastamose

Answer 5

complex system of vessels that supplies blood to periodontal tissues

Question 6

Extracellular Matrix

Answer 6

epithelial = basil lamina, sparse ; connective tissue = more plentiful

Question 7

Nonkeratinized Epithelial Cells

Answer 7

softer, more flexible, found in mucosa

Question 8

Blood Supply of Epithelial Cells

Answer 8

avascular! receive nutrients/O2 by diffusion from underlying connective tissue

Question 9

Sulcular Epithelium

Answer 9

thin, non keratinized, continuous with oral epithelium - extends from crest of gingival margin to coronal edge of JE. permeable!

Question 10

Supragingival Fiber Bundles

Answer 10

[dentogingival unit] fibers located coronal to alveolar crest, strengthen attachment of JE to tooth

Question 11

9 Fiber Bundles

Answer 11

1. Alveologingival 2. Circular 3. Dentogingival 4. Periosteogingival 5. Intergingival 6. Intercircular 7. Interpapillary 8. Transgingival 9. Transeptal

Question 12

Alveologingival Fibers

Answer 12

alveolar crest to gingival connective tissue

Question 13

Circular

Answer 13

encircle tooth coronal to alveolar crest, connects adjacent teeth

Question 14

Dentogingival

Answer 14

[fan] gingiva to teeth, embed in cementum near CEJ

Question 15

Periosteogingival

Answer 15

lateral, alveolar bone to gingiva

Question 16

Intergingival

Answer 16

run mesio-distal around entire arch, link adjacent teeth to dental arch

Question 17

Intercircular

Answer 17

fiber group that encircle several teeth into dental arch

Question 18

Interpapillary

Answer 18

connects oral and vestibular interdental papillae of posterior teeth

Question 19

Transgingival

Answer 19

run horizontally btwn adjacent teeth from cementum at CEJ’s

Question 20

Transseptal

Answer 20

cementum of one tooth to another; helps secure alignment

Question 21

PDL Fiber Groups

Answer 21

Alveolar Crest, Horizontal, Oblique, Apical, Interradicular

Question 22

Biologic Width

Answer 22

portion of tooth surface covered by JE + connective tissue, from JE to crest of alveolar bone. *margins of crowns should be well above bone