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3rd yr- CSB- prosthodontics labs > Lab 1 > Flashcards

Lab 1 Flashcards

1
Q

How ca we replace missing teeth?

A
  1. Implants
  2. Dentures
  3. Bridge
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2
Q

What are the problems with implants

A

We sometimes don’t have enough bone to place an implant

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3
Q

What percentage of the adult population have a partial denture

A

13%

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4
Q

What percentage of the adult population have a complete denture

A

6%

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5
Q

How do we classify dentures?

A
  1. Partial/ complete
  2. By material
  3. By support
  4. Saddle position
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6
Q

Give some ways we can classify dentures according to their material

A
  1. Acrylic
  2. Metal framework
  3. Arylketone polymers (AKP)
  4. Polyamide (nylon)
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7
Q

Give advantages of acrylic dentures

A

Easy to repair or add further teeth to

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8
Q

Give disadvantages of acrylic dentures

A

Covers large surface of the tooth
Affects taste
Collects plaque

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9
Q

Give advantages of metal framework dentures

A

Gingival clearance
Covers less palate
Retention and support between than acrylic

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10
Q

Give disadvantages of metal framework dentures

A

Difficult to repair

Very expense to make

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11
Q

Give some ways we can classify dentures by support

A
  1. Mucosal Borne
  2. Tooth borne
  3. Tooth and mucosa Borne
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12
Q

Where does the force go on a mucosal borne denture

A

When you bite on them force goes straight down to the mucosa

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13
Q

What is a negative of mucosal borne dentures

A

They can exacerbate periodontal disease and increase the resorption of the alveolar ridge

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14
Q

Where does the force go on a tooth borne denture

A

The force is transmitted down the long axis of the supporting teeth, through periodontal apparatus and into supporting bone

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15
Q

How do we classify dentures using saddle position

A

Kennedy 1942

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16
Q

Name the different classes of the Kennedy classification

A

Class I
Class II
Class III
Class IV

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17
Q

What is a class I according to the Kennedy classification

A

Bilateral free end saddle (no teeth past the final abutment)

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18
Q

What is a class II according to the Kennedy classification

A

Unilateral free end saddle (one end has teeth past the abutment of the denture)

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19
Q

What is a class III according to the Kennedy classification

A

Bounded saddle

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20
Q

What is a class IV according to the Kennedy classification

A

Single bounded saddle anterior to abutment teeth

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21
Q

Which tooth decides the class given to a denture according to the Kennedy classification

A

By most posterior saddle

22
Q

What are further saddles called?

A

Called modification or mod

23
Q

Give advantages of spoon dentures

A

low cost

quick means to replace small number of anterior teeth

24
Q

Give disadvantages of spoon dentures

A

Localised gingival trauma

Alveolar damage

25
Q

How can we improve retention and stability on a modified spoon denture

A

Addition of clasps

Extending the laser into contact with some teeth

26
Q

Give some advantages of modified spoon dentures

A

increased retention and stabilty

Increased tooth support due to cingulum rests

27
Q

Give some disadvantages of modified spoon dentures

A
  1. Increased cost
  2. Wrought wire clasps may fracture
  3. Covers more gingival tissue
  4. Bulkier appliance
28
Q

Give advantages of Colleted denture

A
  1. Full palatal cover
  2. Well tolerated
  3. Retentive and stable
  4. easy to manufacture ad adjust or add to
29
Q

Give disadvantages of Colleted denture

A
  1. Full palatal cover
  2. Covers gingival margin
  3. Increased plaque retention
30
Q

What can happen if a collected denture is made incorrectly

A

If you don’t cover the undercut of the tooth then you can risk traumatising the soft tissues and causing gingival inflammation

31
Q

Give an example of a bridge we can use to replace mission gteeth

A

Resin retained bridges

32
Q

When making a denture what questions do you need to ask yourself before choosing which type

A

How did the patient lose their teeth?

caries, periodontal disease or trauma

33
Q

What can happen if someone is given a denture when they have poor oral hygiene

A

Denture induced stomatitis

34
Q

What is denture induced stomatitis

A

It is a fungal infection due to inadequate cleaning of a denture (initially reversible)

35
Q

What can denture induced stomatitis lea to

A

Periodontal disease and pocketing

36
Q

What are the advantages of an Every denture

A

Provides gingival clearance

37
Q

What do we aim to achieve with our denture

A
  1. Gingival clearance where possible
38
Q

Name the different types of clasps found on a cobalt chrome denture

A
  1. Ring clasp
  2. I bar
  3. 3 armed clasps
  4. T bar
  5. J bar
  6. L bar
39
Q

Name the different types of clasps found on a cobalt chrome denture

A
  1. Ring clasp
  2. I bar
  3. 3 armed clasps
40
Q

List the different components of a 3 armed clasp

A
  1. Retentive clasp arm
  2. Reciprocal clasp arm
  3. Occlusal rest
41
Q

Where does the retentive clap arm sit

A

Below the survey line

42
Q

How does the I bar approach the tooth

A

Gingivally

43
Q

How does a ring clasp approach the tooth

A

Occlusally

44
Q

What do occlusal rests do

A

They trait forces down the long axis of the teeth and also prevent the clasp arms from over seating and traumatising gingival tissues

45
Q

Name the 2 types of connectors

A

Major connectors

Minor connectors

46
Q

What is the purpose of a major connector

A

They join the whole denture together and give denture rigidity

47
Q

Give some examples of major connectors on an lower denture

A
  1. Lingual bar

2. Sub lingual bar

48
Q

Give some examples of major connectors on an upper denture

A
  1. Palatal plate

2. Ring design

49
Q

List some common features of major connectors

A
  1. Must be rigid
  2. Gingival Clarence where necessary
  3. Simpler designs collect less plaque
50
Q

Why do major connectors need to be rigid

A

To carry out cross arch bracing (want forces transmitted on one side of the denture to be shared on the other side)

51
Q

What are minor connectors

A

Small bars that join components such as rests and clasps to the major connectors

52
Q

Outline the steps we follow when designing a denture

A
  1. Outline saddles
  2. Put rests
  3. Add clasps
  4. Add reciprocating arms
  5. Minor connectors
  6. Major connectors

3rd yr- CSB- prosthodontics labs (9 decks)

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