Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Dentistry BDS3 > DENTURES3 > Flashcards

DENTURES3 Flashcards

1
Q

What are the objectives of the registration stage?

A

Define shape of maxillary rim

Determine occlusal plane

Define position of the lower teeth

Determine jaw relationship

Select shade and mould

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What equipment is used to trim adjust wax block?

A

Willis bite gauge

Pallet knife

Hot plate

Bunsen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What are the steps in adjusting the upper record block?

A

Adjust upper block for retention, then tooth position, then occlusal plane

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What are the steps in adjusting the record block to maximise retention?

A

Try it in- usually bulky

Any overextension of peripheries or too much lip support will cause it to drop

Use tools to make adjustments (sometimes requires labial/buccal adjustments)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What should you use and consider when adjusting the upper block for tooth position?

A

Old dentures- how much tooth they show

Patients age

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What should be checked when adjusting upper record blocks for tooth position?

A 
Lip Support
Incisal Level
Midline
Buccal corridor
Occlusal plane
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

How is lip support ascertained?

A

Looking at the nasiolabial angle from side on- should be around 90 degrees

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What can be done to check the incised plane level?

A

Look at where it is with current denture

Old photos (caution)

Ask patient to say fricatives

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What factors can cause incised plane level to vary?

A

Age

Lip level

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is the issue with showing more tooth?

A

Can compromise stability of denture

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What should be done before trimming the block to finalise position of anteriors?

A

Get patient to lick lips and relax

Saying fricatives

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What should be done before trimming the block to finalise position of anteriors?

A

Get patient to lick lips and relax

Saying fricatives

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What should the incisal bite plane be parallel to ideally?

A

Interpupillary line

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Where should the upper anterior teeth be positioned?

A

Incisors- up to 1cm anterior to incisive papilla

Canines- below nose

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is used to prescribe tooth position in different types of dentures?

A

Replica- look at treatment plan

Conventional- standard values

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What does marking the lip line on the block help decide?

A

Height of teeth

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

How should the midline be marked on a record block?

A

Use mirror and stand behind patient

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What is the starting point of the buccal corridor?

A

Mid-canine line (canthus of eye to canine area)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What arch has a narrow buccal corridor?

A

Broad arch

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

What does the width of the buccal corridor determine?

A

How much tooth fills space

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

What should the occlusal plane be parallel to?

A

Ala-tragus line (or angled slightly up)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

What are the steps in adjusting the lower record block?

A

Measure vertical dimension and establish face height

Lower tooth position

Registration

23
Q

Why is lower teeth position critical?

A

Prevents loose feeling

24
Q

What is the neutral zone?

A

Area with minimum force acting upon denture

25
Q

What can happen if teeth are too lingually placed?

A

Can impact tongue

26
Q

Where should lower teeth be positioned?

A

Anterior- on ridge (or slightly further forward)

Posterior teeth- on ridge

27
Q

Why should the tongue be utilised in lower denture retention?

A

To hold denture down (Triangular shape of polished surface aids this)

28
Q

What are the options for relationship of the upper and lower anteriors in a denture?

A

Shallow overbite

Overjet- anywhere from edge to edge to class 2

29
Q

What are the options for relationship between upper and lower posteriors in a denture?

A

Normal

Crossbite

30
Q

Why are cross bite relationships often chosen for posteriors in dentures?

A

This occurs when teeth are set on the ridges, means that posteriors don’t impinge on buccal corridor

31
Q

What instruments are used to measure OVD and face height?

A

Willis bite gauge

Dividers

32
Q

How is resting vertical dimension measured?

A

Place dots on point of nose and chin

Ask patient to moisten lips, say ‘m’ and bring them into light contact with adjusted rims in situ

33
Q

How is OVD measured

A

Insert upper and lower blocks

Reduce the LOWER wax rim in height until it contacts upper rim evenly

34
Q

What should the difference between RVD and OVD be?

A

OVD should be 2-4mm less than RVD (often greater with worn teeth)

Avoid negative FWS

35
Q

What teeth are usually used in complete dentures and why?

A

Hybrid- cusp incline allows some articulation

*cusped have too much inclination

36
Q

What is the RCP?

A

Guided occlusal relationship at most retruded position of condyles in joint cavity

37
Q

Why is RCP used in edentulous patients

A

It is a reproducible maxillomandibular relationship

38
Q

How can RCP be measured?

A

Get patient to close mouth and put tongue as far back as possible

39
Q

Which position may be considered more comfortable for the patient when measuring occlusion?

A

ICP- condyles in fossa

40
Q

What can be done to help you reposition blocks when measuring occlusion?

A

Add notches to allow yourself to reposition if required

41
Q

Why is wax not used to measure occlusion?

A

Once recorded it is set and record blocks cannot be taken apart

Means that you cannot double check occlusion

42
Q

What is used to record occlusion?

A

Bite recording paste

43
Q

Which articulators are used in the production of complete dentures?

A

Average Value

44
Q

What can be used to help you pick the mould for teeth in denture?

A

Previous dentures

Photos

Facial Profile- square, ovoid, tapered

45
Q

What are the 3 numbers on the mould cards?

A

Top- distance between distal of canines (not mid canine line)

Mid- Height of central incisor

Low- Width of central incisor

46
Q

How do you choose the width of anterior teeth?

A

Use old denture

Using a transparent rule (remember that marks at placed at mid canine- line and mould value is from distal)

47
Q

What can be used to choose height of anterior teeth?

A

Previous denture

High smile line marked on blocks

48
Q

Why may teeth appear shorter in denture than they look on moulds?

A

As some of the neck will be hidden by acrylic

49
Q

What are the different types of posterior teeth?

A

Cuspless- HO/HU

Hybrid- FO/FU (12 degrees)

Cusped (33 degrees)

50
Q

When may cusp less teeth be a good option?

A

If there is no good reproducible bite (teeth tend to slide around side to side)

51
Q

How do you select a shade?

A

Shade guide

Patient preference

Previous denture

Skin colour

-> select natural shade and note down if you disagree

52
Q

How should teeth be arranged?

A

Can be perfect alignment

Personalised- with diastema and imbrications set in

53
Q

What should be written on the prescription card for next visit (try-in)?

A

Articulate casts to registration provided

Try-in- with shade and mould

Any special instructions- adjustments, different alignments

54
Q

What is the freeway space

A

RVD-OVD

Dentistry BDS3 (7 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions