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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
How can we improve retention and stability on a modified spoon denture
Addition of clasps | Extending the laser into contact with some teeth
26
Give some advantages of modified spoon dentures
increased retention and stabilty | Increased tooth support due to cingulum rests
27
Give some disadvantages of modified spoon dentures
1. Increased cost 2. Wrought wire clasps may fracture 3. Covers more gingival tissue 4. Bulkier appliance
28
Give advantages of Colleted denture
1. Full palatal cover 2. Well tolerated 3. Retentive and stable 4. easy to manufacture ad adjust or add to
29
Give disadvantages of Colleted denture
1. Full palatal cover 2. Covers gingival margin 3. Increased plaque retention
30
What can happen if a collected denture is made incorrectly
If you don't cover the undercut of the tooth then you can risk traumatising the soft tissues and causing gingival inflammation
31
Give an example of a bridge we can use to replace mission gteeth
Resin retained bridges
32
When making a denture what questions do you need to ask yourself before choosing which type
How did the patient lose their teeth? | caries, periodontal disease or trauma
33
What can happen if someone is given a denture when they have poor oral hygiene
Denture induced stomatitis
34
What is denture induced stomatitis
It is a fungal infection due to inadequate cleaning of a denture (initially reversible)
35
What can denture induced stomatitis lea to
Periodontal disease and pocketing
36
What are the advantages of an Every denture
Provides gingival clearance
37
What do we aim to achieve with our denture
1. Gingival clearance where possible
38
Name the different types of clasps found on a cobalt chrome denture
1. Ring clasp 2. I bar 3. 3 armed clasps 4. T bar 5. J bar 6. L bar
39
Name the different types of clasps found on a cobalt chrome denture
1. Ring clasp 2. I bar 3. 3 armed clasps
40
List the different components of a 3 armed clasp
1. Retentive clasp arm 2. Reciprocal clasp arm 3. Occlusal rest
41
Where does the retentive clap arm sit
Below the survey line
42
How does the I bar approach the tooth
Gingivally
43
How does a ring clasp approach the tooth
Occlusally
44
What do occlusal rests do
They trait forces down the long axis of the teeth and also prevent the clasp arms from over seating and traumatising gingival tissues
45
Name the 2 types of connectors
Major connectors | Minor connectors
46
What is the purpose of a major connector
They join the whole denture together and give denture rigidity
47
Give some examples of major connectors on an lower denture
1. Lingual bar | 2. Sub lingual bar
48
Give some examples of major connectors on an upper denture
1. Palatal plate | 2. Ring design
49
List some common features of major connectors
1. Must be rigid 2. Gingival Clarence where necessary 3. Simpler designs collect less plaque
50
Why do major connectors need to be rigid
To carry out cross arch bracing (want forces transmitted on one side of the denture to be shared on the other side)
51
What are minor connectors
Small bars that join components such as rests and clasps to the major connectors
52
Outline the steps we follow when designing a denture
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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