Edentulous Anatomy

Question 1

The vibrating line is often 2mm away from __________.

Answer 1

fovea palatini (pits in the palate)

Question 2

notch/fissure at junction of maxilla and hamular process of sphenoid bone, distal to the most distal process of the alveolar ridge

Answer 2

hamular notch

Question 3

distobuccal side of the maxillary impression/denture, patient moves in lateral excursion during impression to capture anterior process of this

Answer 3

coronoid notch

Question 4

fibrous tissue that links superior pharyngeal constrictor muscle and buccinator, captured in the impression if the patient opens wide

Answer 4

pterygomandibular raphe

Question 5

muscles linked by the pterygomandibular raphae

Answer 5

superior pharyngeal constrictor muscle and buccinator

Question 6

alveolar ridge that is broader and wider

Answer 6

mandibular

Question 7

frenum attached to orbicularis oris and buccinator

Answer 7

buccal frenum

Question 8

frenum attached at the midline to orbicularis oris

Answer 8

labial frenum

Question 9

frenum attached to genioglossus

Answer 9

lingual frenum

Question 10

vestibule attached to buccinator

Answer 10

buccal vestibule

Question 11

vestibule attached to mentalis

Answer 11

labial vestibule

Question 12

distobuccal area on the mandibular impression/denture

Answer 12

masseteric notch (analogous to the coronoid notch of maxilla)

Question 13

determines the distal extension of the edentulous ridge of the mandible, should be covered by denture for retention

Answer 13

retromolar pad

Question 14

The retromolar pad should be covered by the denture for retention and support since it has attachments from the following muscles:

Answer 14

• superior pharyngeal constrictor
• pterygomandibular raphe
• buccinator
• temporalis

Question 15

sulcus between the mandibular alveolar ridge and the tongue, runs posterior to the lingual frenum

Answer 15

alveololingual sulcus

Question 16

3 regions of the alvelololingual sulcus

Answer 16

1) Anterior- from lingual frenum to premylohyoid fossa
2) Middle- from premylohyoid fossa to distal end of mylohyoid ridge
3) Posterior- reaches the retromylohyoid fossa

Question 17

lateral to the posterior alveolar ridge, supports the denture

Answer 17

buccal shelf