Anatomy of Denture bearing Area - maxilla

Question 1

What can destabilise the denture?

Answer 1

Muscles, during swallowing or eating

Question 2

What are the astrix showing?

Answer 2

These points are not static, the change with teh muscles

Question 3

What other structures can have an effect on the denture?

Answer 3

Ligaments, frenulum and glandular tissues

Question 4

Can the pterygomandibular raphe affect the denture?

Answer 4

Yes, when opening mouth it may impede on it

Question 5

What effect does the labial Freya have on the denture?

Answer 5

Different to buccal frenulum

Said to contain no muscle fibres but CT

It may destabilise the denture

If there is no relief for the labial frena, may cause trauma and ulceration - not so much destabilisation of denture but trauma

Question 6

Can a space for the labial frena affect the denture?

Answer 6

Yes, it can cause a midline fracture

Question 7

How do you relieve the denture at the labial frena?

Answer 7

Make it a U shape instead of a V shape

Question 8

Do you sometimes have to surgically remove the labial frena?

Answer 8

Yes, if it is particularly large

Question 9

What area is beyond the 3rd molar?

Answer 9

Retromolar pad

Question 10

What is the role of the retromolar pad in dentures

Answer 10

Contains glandular tissue

Compressible tissue

Are can be shed for retention

Question 11

How much of the retromolar pad shows k the denture be extended to?

Answer 11

About half

Question 12

What is shown here?

Answer 12

Retromolar pad

Question 13

Do you consider the maxillary denture/dentition with the retromolar pad?

Answer 13

Yes - the heel will ht against it when the mouth is closed and destabilise denture

Question 14

How do you know the maxillary denture is destabilised?

Answer 14

Dropping of anterior portion

Question 15

Where does the coronoid process lie in relation to the maxillary?

Answer 15

Lies lateral to the maxillary tuberosity

Question 16

What can the coronoid process impead on? What does this cause ?

Answer 16

Sometimes impead on the buccal flange o a denture and case pain or instability

Question 17

Where does the coronoid process go when you open the mouth?

Answer 17

Towards 3rd molar

Impead on the flange

Question 18

What happens of the buccal flange is to thick?

Answer 18

When you open the mouth the coronoid notch will impeded on it, cause pain form tissues ver coronoid notch

Question 19

Can the coronoid notch destabilise the denture?

Answer 19

Yes

Question 20

What should you measure to avoid the coronoid notch impending on the buccal flange?

Answer 20

Depth and width characteristics

Question 21

What is the hamular notch?

Answer 21

Question 22

Where is the hamular notch located?

Answer 22

The notch is the junction of the maxillary tuberosity and hamular process.

Periphery of a correctly extended denture should extend through these notches via the area of the fovea palatinae

Question 23

What is the importance of teh hamular notch?

Answer 23

Needs to be incorporated in the impression and that needs to be shown by the blue impression shown.

Capture it to obtain the peripheral seal - good suction

Question 24

If a pt comes to you with a loose denture, what area would you look at?

Answer 24

Hamular notch area

Need to capture the full depth of the area

Question 25

What seal does the hamular notch allow?

Answer 25

Peripheral seal

Question 26

What is shown here?

Answer 26

Palatine fovae

Question 27

What is the fovae palatinae?

Answer 27

Pair of mucous gland duct orifices near the midline at the junction of the hard and soft palate

Question 28

What do the fovae palatine provide?

Answer 28

Provide a guide to the position of the posterior palatal border of the denture

Question 29

Where is the fovae palatinae located?

Answer 29

Between the hard an soft palate

Question 30

What is the vibrating line?

Answer 30

Tell pt to say AHHHH

Soft palate will vibrate

Question 31

Where does the denture need to extend to capture the fovae palatinae?

Answer 31

Vibrating line

Question 32

What does captured the vibrating line (palatine fovae) allow?

Answer 32

Posterior peripheral seal and retention for denture

Suction oof denture

Question 33

How do you know where the incisors should be on an edentulous pt?

Answer 33

Incisive papilla

Mass of fibrous tissue behind the upper incisors

Question 34

Alma gauge?

Answer 34

Devise to set where the anterior teeth should sit in an edentulous pt

Question 35

What is the role of the rugae?

Answer 35

Articulation of sound

Mastication - rough palate

Are like finger prints - they are similar to finger prints - unique

Dentures…

Used to determine where to put the cane teeth

Need to have in the impression - to make sure the new dentition does not damage them

Question 36

Posterior palatal seal?

Answer 36

At the vibrating line

On the denture this is the posterior palatal seal

Question 37

When is the residual ridge irregular?

Answer 37

Teeth extracted at different times

Question 38

What is the residual ridge?

Answer 38

Height, width, form, thickness and consistency

Question 39

What does the shape of the palatal vault affect?

Answer 39

Retention of the denture

Resistance to lateral displacement

Tongue space

Question 40

What is tori?

Answer 40

Torus palatines

A bony enlargement (hyperostosis) occurring in th midline of the hard palate in about 20% of the population

Question 41

How would you accommodate palatal torus?

Answer 41

Or surgical excision

Question 42

Answer 42

A = buccal frenum

B = retro-zygomatic area

Question 43

Answer 43

Question 45

What does the size of the buccal sulcus depend upon?

Answer 45

Contraction of buccinator muscle

Position of the mandible

Amount of bone loss

Question 46

Where does the buccal sulcus extend from and to?

Answer 46

Extends from the buccal frenum to hamular notch

Question 47

Mucoperiosteum?

Answer 47

Mucosa attached to the periosteum and underlying tissue