Trial Placement Flashcards

1
Q

What is another name for the trial placement?

A

wax try-in

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2
Q

Why are esthetics important for a trial placement?

A

it needs to be neat since it is going into the mouth and the patient is going to see it

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3
Q

What is a wax trial placement?

A

denture stage becomes a critical phase of complete denture care in evaluating this relationship

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4
Q

The dentist should approach the appointment with the attitude that…

A

errors may exist in all areas

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5
Q

What is a trial denture?

A

a preliminary arragement of denture teeth that has been prepared for placement into the patient’s mouth to evaluate esthetics and maxillomandibular relationships

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6
Q

Shapes and sizes of teeth selected are based on…

A

anatomic averages

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7
Q

Why should you not overlook problems?

A
  • difficult/impossible to change after processing
  • may require removal, restting and re-prossessing
  • can be costly and time consuming
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8
Q

What are the parts of a checklist for the steps of clinical evaluation for trial placement?

A
  • CO = CR
  • occlusal vertical dimension
  • midline
  • horizontal and vertical overlap
  • lip support
  • occlusal plane
  • buccal corridor
  • esthetics
  • phonetics
  • maxillary posterior limit
  • protrusive record and articulator settings
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9
Q

What should you use inside the trial bases when trying them on?

A

denture adhesive powder

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10
Q

What should you check during the trial denture clinical evaluation?

A
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11
Q

How can you assess occlusal vertical dimesion?

A
  • numerous methods suggested
  • all methods are unscientific
  • should access using a combo of methods for more accuracy
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12
Q

What should you check when considering the OVD?

A

2-4 mm space between teeth when mandible is in PRP

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13
Q

How do you do a OVD assessment? (stretch-relax method)

A
  • dot on nose and chin; open wide (hold for 20 seconds)
  • slowly close until lips first touch and measure that distance
  • hold for 15 seconds and then close until teeth touch; measure again
  • difference in measurements is “interocclusal distance” (about 2-4 mm)
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14
Q

How do you do a OVD assessment? (swallow-relax method)

A
  • patient is asked to swallow and then relax
  • teeth contact while swallowing and the separate when relaxing
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15
Q

What should the closest speaking space be?

A
  • rapid speech of sibilant sounds (S, Ch, “sixty six, san francisco, kansas city, chiefs”)
  • should be no contact of max and mand teeth when speaking
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16
Q

What should you verify about the casts during the trial placement?

A

make sure the casts are mounted correctly in CR on the articulator

17
Q

How do you check if your casts are mounted correctly in CR?

A
  • check with articulating paper
  • stablize the mandibular denture
  • new CR record
  • make new interocclusal record in mouth and check on articulator
  • use a small amount of recording material
  • remount if needed…
18
Q

How do you know if you have an accurate mounting?

A
  • teeth interdigitate perfectly
  • condylar ball should contact fossae wall
19
Q

How do you determine the level of occlusal plane anterior?

A
  • anterior determined by esthetics/phonetics
  • resting upper lip: 1-2 mm incisor teeth visible
  • smiling: displays most of teeth length but minimal amount of base
20
Q

Maxillary incisors should have positive contact with lower lip when ________ sounds are made.

A

fricative sounds (F, V, “very funny”)

21
Q

How do you determine the level of occlusal plane posterior?

A
  • molars should be 2/3 up the retromolar pad
  • plane should be 2-3 mm below dorsal surface of resting tongue
  • planes should parallel the two residual ridges and bisect the space between the ridges
22
Q

Maxillary posterior teeth generally parallel to what plane?

A

ala-tragus plane (Camper’s plane)

23
Q

Maxillary posterior teeth should do what on the occlusal plane?

A

should not appear to descend posteriorly

24
Q

What are sibilant sound?

A

S, Ch
(occulsal vertical dimensions)

25
Q

What are fricative sounds?

A

F, V
(incisors hit wet/dry line of lip)

26
Q

If teeth touch when speaking S sounds, occlusal vertical dimension is…

A

too far open

27
Q

If the patient whistles on sibilant sounds then what is wrong with the contour of anterior palate?

A

too narrow

28
Q

If the patient lisps on sibilant sounds then what is wrong with the anterior palate?

A

too broad

29
Q

What can cause lisping?

A
  • non-uniform overjet of the anterior teeth
  • diastemas between teeth
  • palatal contours
  • diamond-shaped openings between incisors
30
Q

What should the incisal plane be in relation to interpupillary line?

A

parallel to it

31
Q

Where shoudl the posterior tooth positions be?

A

mediolaterally centered over denture-bearing area

32
Q

What should you check during the trial placement?

A
33
Q

What is one of the most important parts of the trial placement?

A
  • patient approval (friends and family as well)
  • leave the patient alone for a few mintues to look in a mirror
34
Q

What should the denture base be: convex or concave?

A

should NOT be convex

35
Q

What will happen if the denture base is too thick? Too thin?

A

Too thick - impair comfort
Too thin - weakened

36
Q

What should the laboratory prescription be?

A
  • processing, finishing, and polishing
  • laboratory remount of the dentures
  • adjustment of occlusion to compensate for processing changes