Denture Manual 1-51 Flashcards Preview

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Flashcards in Denture Manual 1-51 Deck (44)
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1

Mandibular arch
- Areas of primary support
- Areas of secondary support

Primary: Buccal shelves, posterior ridge, retromolar pad

Secondary: Anterior ridge

2

Maxillary arch
- Areas of primary support
- Areas of secondary support

Primary: Posterior ridge, palate, and tuberosities

Secondary: Anterior ridge

3

House's Palatal Classification - Class I

The junction between mobile and immobile soft palate is 5-13 mm distal to the line formed between the two pterygomaxillary notches

4

House's Palatal Classification - Class II and III

The junction between mobile and immobile soft palate is 1-5 mm distal to the line formed between the two pterygomaxillary notches.

Class III: The junction between mobile and immobile soft palate is 1-5 mm anterior to the line formed between the two pterygomaxillary notches.

5

Five methods to improve the support of a denture (pg 7)

1. Tissue conditioning
2. Surgical removal of pendulous tissue
3. Surgical removal of a sharp or spiny ridge
4. Surgical enlargement of the ridge (bone graft, skin graft, vestibuloplasties)
5. Implants

6

Five requirements for denture stability (pg 7)

1. Good retention
2. Non-interfering occlusion
3. Proper tooth arrangement
4. Proper form and contour of the polished surfaces
5. Good control and coordination of the patient's musculature

7

Five manners of denture retention (pg 7)

1. Adhesion (between unlike)
2. Cohesion (between like)
3. Interfacial surface tension (a thin film of saliva)
4. Mechanical locking into undercuts
5. Peripheral seal and atmospheric pressure

8

Purpose of the posterior palatal seal and who wrote about this (pg 8)

1. Compensates for dimensional changes of denture acrylic
2. Retention of a maxillary denture (peripheral seal)
3. Reduces gag reflex
4. Reduces food accumulation
5. Posterior denture border becomes less noticeable to the dorsum of the tongue
6. Strength of denture

Millsap wrote about this

9

Retromolar pad (pg 29)
- Comprised of what?
- Bounded laterally, posteriorly, and medially by what?

Soft elevation of mucosa tissue comprising of loose connective tissue and mucous glands
- Bounded laterally by the buccinator
- Posteriorly by the temporalis tendons
- Medially by pterygomandibular raphe and superior constrictor

10

Pear-shaped pad versus retromolar pad (pg 29)
- What is the pear-shaped pad?
- How are they positioned against each other
- Who coined the phrase pear-shaped pad?

The pear-shaped pad is residual scar of the third molar

The pear-shaped pad is anterior to the retromolar pad

Coined by Craddock

11

Buccal shelf (pg 29)
- Lateral boundary
- Medial boundary
Located between the ___ and the anterior edge of the ___

1. Lateral: External oblique ridge
2. Medial: Slope of the ridge

3. Located between the BUCCAL FRENUM and the anterior edge of the MASSETER

12

Which frenum has more "vertical" area of activity leading to a narrow notch in the denture - Labial or buccal frenum? (pg 29)

Labial = Narrow - usually just a single narrow band due to primarily vertical movements

Buccal = Wider due to horizontal as well as vertical movements

13

Frenum's (pg 29)
- What kind of tissue do they consist mainly of?
- What is their purpose in relation to the tongue, lips, and muscles of the cheeks?
- Buccal frenum may have some musculature

1. Fibrous connective tissue
2. They are accessory limiting structures as they do not contract or expand like muscles

14

Mandibular Labial vestibule (pg 29)
- Where is it?
- What is the major muscle in this area for border molding?

Sulcus area between the buccal freni

Orbicularis oris. Mentalis may be very active for some patients as well

15

Buccal vestibule (pg 29)
- Width and length are mainly dependent on the ___ and the ___ muscle
- Originates from the ___ of the maxillary and mandibular ridges and distally from the _____.

1. Buccal shelf and buccinator
2. Originates from the posterior buccal of the maxillary and mandibular ridges and distally from the pterygomandibular raphe

16

An active masseter will create what kind of shape in the denture?

Active masseter will create a concavity in the outline of the distobuccal border. Less active a convex border.

17

Lingual vestibule - describe the three regions and what muscles are found in each

1. Anterior lingual vestibule (genioglossus)
2. Middle lingual vestibule (mylohyoid)
3. The posterior lingual vestibule or lateral throat form (. Bounded anteriorly by the mylohyoid, laterally by the pear-shaped pad, posterolaterally by the superior constrictor, posteromedially by the palatoglossus, laterally by the tongue

18

What determines the posterior limit of a mandibular denture (pg 30)

Primarily the palatoglossus and somewhat by the superior constrictor

19

What muscles influence the buccal vestibule? (pg 31)

Influenced mainly by the modiolus and buccinator muscle

20

Ptyergomandibular raphe (pg 31)
- Originates from where and attaches to the distal end of what?

Originates from the pterygoid hamulus of the medial lamina and attaches to the distal end of the mylohyoid ridge.

21

Palatine aponeurosis (pg 31) - What is it and is it okay to put a heavy seal on the area?

Tendon-like band in the midline which attaches to the posterior nasal spine and supports palatal tissue.

Do not put a heavy seal in this area!

22

Parotid gland (pg 31) - Located in what fossa?
- The salivary output is what type and via what duct?

Located in the retromandibular fossa

The salivary output is mixed but predominantly serous via Stenson's duct

23

Submandibular gland (pg 31) - Located in what triangle?
- The salivary output is what type and via what duct?

Submandibular triangle

Mixed but predominately serous via Wharton's duct

24

Sublingual gland (pg 31) - Located in what fossa?
- The salivary output is what type and via what duct?

Sublingual fossa

Mixed but predominately mucous via Bartholin's ducts

25

Palatal glands (pg 31) - Located where?
- The salivary output is what type?

Located in the hard and soft palate

Exclusively mucous

26

Non-surgical treatment methods for management of abused oral tissues

1. Rest for denture supporting tissues 48-72 hours - Advocated by Lytle
2. Vertical dimension correct via repair/lining
3. Occlusal correction - distributing forces - Probably most important factor
4. Good nutrition
5. Oral hygiene
6. Oral massage (technique by Morrow)- Large bolus of bubble gum to massage basal seat area
7. Tissue conditioner (advocated by Lytle)

27

Tissue conditioners - What powder acrylic, liquid, plasticizer, and initiator?

Acrylic - polyethyl methacrylic
Liquid - aromatic esters and ethyl alcohol
Plasticizer - Dibutyl phthalate
Initiator - Usually a peroxide

28

Why is the biocompatibility of tissue conditioners / soft liners of interest? (pg 38)

It's been demonstrated that both materials leach out significant amounts of alcohol and phthalate esters

29

Ideal properties of a resilient denture base material? (pg 39)

1. Permanent resiliency
2. Dimensional stability
3. Adherence to the denture base
4. Colour stability
5. Biocompatibility
6. Inertness to fungus and bacteria
7. Absence of odour, taste, irritation, and toxicity
8. Ease of processing, adjustment, and repair
9. Wettability
10. Low fluid absorption
11. Abrasion resistance
12. Long shelf life
13. Moderate price

30

Indications for processed soft liners (pg 39)

1. Bothersome resorbed areas (mental foramina)
2. Undercut areas where surgical reduction is contraindicated
3. Parafunction (chronic soreness due to heavy bruxism or poor health)
4. Relief of painful raphe area or rugae
5. Restoration of oral defects