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Clinical Knowledge 2 > Occlusal Registrations > Flashcards

Occlusal Registrations Flashcards

1
Q

What is occlusal registration?

A

records the relationship between the maxilla and mandible when the opposing teeth are in contact

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2
Q

Where should your post dam be placed?

A

should be placed on non movable soft tissue behind the hard palate

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3
Q

What are occlusal rims usually made of ?

A

wax
wax and acrylic

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4
Q

What is the benefit of using an acrylic base plate?

A

the possible addition of a post-dam to improve retention

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5
Q

What are the factors to consider and record in an bite registration ?

A
  • vertical dimension
  • horizontal relationship
  • soft tissue support
  • Teeth- position, shade, mould, setting
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6
Q

What is the vertical dimension?

A

how far away the chin is from the nose

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7
Q

What is the risk of overclosure?

A

there is the risk of developing angular chelitis

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8
Q

What is the risk of overclosure?

A

there is the risk of developing angular chelitis

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9
Q

What should you consider in the case where a patients old denture is overclosed?

A

how much greater of a vertical dimension the patient can tolerate

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10
Q

What denture components contribute to soft tissue support in complete dentures?

A
  • vertical dimension
  • position of incisors
  • labial contour
  • arch width
  • buccal contour
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11
Q

What part of the maxillary complete denture provides primary support?

A

the hard palate

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12
Q

What part of the maxillary complete denture provides secondary support?

A

the ridge crest

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13
Q

What part of a -/C provides primary support to the denture?

A

the buccal shelf
the primary load is located on the buccal shelf

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14
Q

What part of the -/C provides secondary support to the denture?

A

lower ridge crest
pear shaped pads- the retromolar pads

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15
Q

What is the sequence you should follow for checking you upper occlusal rims?

A
  • disinfect the wax rims and plaster models

Check
* fit and extension
* labial contour
* buccal contour
* occlusal plane

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16
Q

In order to record the occlusal plane, how should wax be removed?

A

*you should remove wax to the level of the incisal edges

this is the level where your incisal edges will sit

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17
Q

What is the neutral zone?

A

this is a space where the function of the musculature does not unseat the denture

it is also where the forces generated by the tongue are neutralised by the forces generated by the lips and cheeks

it is essentially the area the muscle impacts the least

18
Q

Where is the neutral zone usually located?

A

directly over the ridges

19
Q

What is a potential consequence of straying outside of the neutral zone?

A

this can lead to patient cheek biting

20
Q

What can you use to potentially find the neutral zones?

A

viscogel

21
Q

How should the fox’s plane guide be lined up?

A

lined up with eyes - interpupillary line
Line up with alar tragal line

22
Q

What should you check on you lower block?

A
  • fit and extension
  • labial contour- lower incisors over the ridge
  • adjust occlusal surface to give vertical dimension and even contact with upper block
  • check appearance
  • review upper block if necessary
23
Q

What happens if your lower block is over extended?

A

begins to raise

24
Q

What is the ideal freeway space allocation for C/C?

A

3mm

25
Q

What are the consequences of a vertical dimension that is too great?

A
  • feels like a mouthful
  • muscular effort to close lips
  • teeth touching at rest
  • teeth clacking when eating and speaking
  • pain under dentures
  • ulcerations
  • ridge resorption
26
Q

What is the consequence of a vertical dimension that is too small?

A
  • patient looks old
  • lip rolling outwards or inwards on closure
  • deep lines at corners of mouth
  • often very comfortable
    *
27
Q

What vertical dimensions should you record?

A

OVD- occlusal vertical dimension
RVD- resting vertical dimension

28
Q

How should you measure OVD?

A

measure with existing dentures in place and teeth in contact

29
Q

How should you measure RVD?

A

ask patient to relax
lick lips and breathe out
this allows teeth to come apart

30
Q

How do you calculate freeway space?

A

RVD-OVD= FWS

31
Q

What must there be after adjusting upper and lower blocks?

A

there should be even contacts between upper and lower rims

32
Q

What guidance can you use to record you canine line?

A

flare of the nose

33
Q

Why is medium bodied silicone inappropriate for securing rims together?

A

takes 2 minutes to set as opposed to reg mousse which takes 20 seconds to set

34
Q

What is the best position to record your bites before sealing your occlusal rims?

A

in the retruded contact position (RCP)

35
Q

How can you record bite on partial occlusal rims?

A
  • place soft wax (cardium wax) onto the block surfaces and get patient to bite through the wax
  • cardium wax displaces around both sies and does not go into undercuts
36
Q

What marks should be on your occlusal blocks?

A

centre line
smile line
canine lines

37
Q

When occlusal rims are correct, they are sealed in the patients mouth in their natural position or the …

A

retruded contact position

38
Q

What aids can you use to decide the mould of teeth you would like to use?

A
  • Look at old dentures, if okay, take impression
  • measure incisal width, incisal length, total width 3-3
  • if these are all not okay, use smile lines, canine line and judgement
39
Q

What is the purpose of the alma gauge?

A
  • allows the position of the incisal edges of an existing full upper denture to be reproduced on a registration block
  • it is important if the appearance of the existing denture needs to be reproduced exactly

relative position of the incisal edge to the incisive papilla is compared

40
Q

What does dimension A using the alma gauge give?

A

vertical dimension

41
Q

What does dimension B of the alma gauge give?

A

the horizontal seperation from the incisive papilla and the incisal edge

essentially the overjet

Clinical Knowledge 2 (40 decks)

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