Prosthodontics: Maxillary & Mandibular Edentulous Anatomy

Question 1

Maxillary Labial Frenum

Answer 1

At or adjacent to midline

Question 2

Maxillary Buccal Frenum

Answer 2

Either Side of Alveolar Ridge

Attach:
* orbicularis oris
* buccinator

Question 3

Maxillary Labial Vestibule

Answer 3

Anterior to the 2 buccal Frena

Question 4

Maxillary Buccal Vestibule

Answer 4

Posterior to buccal frenum to hamular notch

Question 5

Hamular Notch

Answer 5

soft tissue

connects:
* distal end of maxilla
* pterygoid hamulus

Question 6

Vibrating Line

Answer 6

Pt says AHH=Location
* from hamular notch to hamular notch
* 2mm away from fovea palatini

Question 7

Buttery Fly Line

Answer 7

Junction b/w hard and soft palate
* anterior to vibrating line

Valsalva maneuver: butterfly line balloons down
* hold nose and try to blow through nose

Question 8

Posterior Palatal Seal

Answer 8

part of denture that compresses soft tissue of palate=suction

Anterior Boundary=Butterfly Line
Posterior Boundary=Vibrating Line

Question 9

Cornoid Notch

Answer 9

DB part of maxillary impression/denture

Pt moves jaw side to side during border molding
* Coronoid notch slides past DB region of impression

Question 10

Pterygomandibular Raphe

Answer 10

Pt opens wide to capture on posterior part of impression

Connect:
* buccinator m.
* superior pharyngeal constrictor

Question 11

What are the 2 most important movements for upper impressions?

Answer 11

Move the Mandible Left/Right
* coronoid process glides past the distobuccal corners of denture

Open mouth wide
* pterygomandibular raphe tightens and molds impression in back

Question 12

Mandibular Labial Freenum

Answer 12

Attach:
* orbicularis oris

Question 13

Mandibular Buccal Freenum

Answer 13

Attaches:
Orbicularis oris
Buccinator

Question 14

Lingual Freenum

Answer 14

Mandible

Attaches:
Genoglossus

Question 15

Mandibular Labial Vestibule

Answer 15

Anterior to buccal frena

Mentalis Muscle (Chin)=inferior border

Question 16

Mandibular Buccal Vestibule

Answer 16

Posterior to buccal frena
Buccinator m=inferior border

Question 17

Retromolar Pad

Answer 17

Mandible

marks the distal extension of edentulous ridge
* Ideally covered for support and retention (bc bone integrity is maintained)

Attaches:
* temporalis m.
* buccinator m.
* superior pharyngeal constrictor
* pterygomandibular raphe

Question 18

Masseteric Notch

Answer 18

DB area on mandibular impression/denture (analogous to hamuler notch)
*Masseter contracts when the mouth closes against resistance

Have pt close against resistance to capture in border molding
* prevents masseter from impinging on overextended DB corner of denture

Question 19

Alveolingual Sulcus

Answer 19

B/w mandibular alveolar ridge and tongue
2 S’s (Vertical S & horizontal S)

3 Regions:
Anterior Region: From lingual freenum to premylohyoid fossa
* First curve in the S
* Sublingual gland sits above mylohyoid muscle
* Want shorter flange

Middle Region: From premylohyoid fossa to distal end of mylohyoid ridge
* 2nd curve of S
* Flange is deflected medially away from the mandbible
* due to mylohyoid ridge & contraction of mylohyoid medially

Posterior Region: extends into retromylohyoid fossa
*Mylohyoid attaches higher the more posterior you go, but posterior fibers are directed vertically
* Flange= longer and deflected laterally towards the mandibular ramus=3rd curve of S
* extension is limited by palatoglossus and superior constrictor muscles

Question 20

Buccal Shelf

Answer 20

Main Support for Denture
* Perpendicular to occlusal forces
* lateral to posterior alveolar ridge

Attaches: Buccinator