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Comp Rem Pros - LECTURE > Lecture 1 > Flashcards

Lecture 1 Flashcards

1
Q

What are the three types of prosthodontics?

A

fixed
removable
maxillofacial

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2
Q

What is the main function of dentures?

A

to restore function

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3
Q

What is support?

A

resistance to vertical movement of the denture base toward the ridge

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4
Q

What is stability?

A

resistance to horizontal or rotational movement

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5
Q

What is retention?

A

resistance to displacement of the denture away from the ridge

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6
Q

What are the forces of retention?

A

-interfacial surface tension
-intimate tissue contact
-border seal
-atmospheric pressure
-neuromuscular control

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7
Q

What is the support of the natural dentition?

A

45 cm squared in each arch

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8
Q

What is the support of complete dentures in maxillary?

A

23 cm squared

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9
Q

What is the support of complete dentures in mandibular?

A

12 cm squared

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10
Q

What are dentures a replacement for?

A

NO teeth

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11
Q

What do you look for in intraoral exams?

A

-muscosa
-basal seat
-arch form
-interarch space

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12
Q

What are the four types of patient classification?

A

philosophical, exciting/critical, hysterical, and indifferent

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13
Q

What does border molding do?

A

allows the intraoral soft tissues to form the length, width, and shape of custom tray borders prior to making the secondary impression

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14
Q

What are intermediate dentures?

A

fabricated prior to extracting natural teeth

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15
Q

What does pressure on mucosa cause?

A

soreness and resorption

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16
Q

What causes denture movement?

A

resiliency of tissue
instability of the dentures

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17
Q

What is the intaglio surface?

A

inside surface of denture that touches the tissue

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18
Q

What is the cameo surface?

A

outside surface of the denture

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19
Q

What is Wolff’s Law?

A

living bone responds to functional stress by depositing bone in areas of stress

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20
Q

How do you reduce pressure of residual ridges?

A

no contact of anterior teeth
-clinical remount and equilibration at delivery to reduce occlusal discrepancies

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21
Q

What is adhesion?

A

attractions of unlike molecules for each other

22
Q

Do dentures cure edentulism?

A

no

23
Q

What does the wearing of dentures almost always cause?

A

undesirable loss of bone

24
Q

Which ridge usually resorbs more?

A

the anterior mandibular
(4 times that of maxillary)

25
Q

Characteristics of residual maxillary ridge:

A

partly covered by a layer of cortical bone after teeth are extracted

26
Q

Characteristics of residual mandibular ridge:

A

crest remains spongy, trabeculated and not very resistant to resorption

27
Q

What is the primary denture support area of mandibular arch?

A

buccal shelf

28
Q

What is the snowshoe principle?

A

decrease the pressure per unit area by extending the denture base to cover the maximum area within physiologic tolerance

29
Q

What does more saliva contact cause?

A

more contact adhesion (retention)

30
Q

What is xerostomia?

A

dryness present much difficulty for denture wearers- discomfort, ulceration, retention loss, and chewing problems

31
Q

What are factors that help with stability?

A

-shape of alveolar ridge
-size of alveolar ridge/vestibular depth
-flange length and shape
-intimate fit of prothesis

32
Q

What is the flange?

A

the part of the denture that fits into the vestibule

33
Q

Percentage of irreversible hydrocolloid that is diatomaceous earth?

A

60%

34
Q

Percentage of irreversible hydrocolloid that is calcium sulfate?

A

16%

35
Q

Percentage of irreversible hydrocolloid that is potassium alginate?

A

15%

36
Q

Percentage of irreversible hydrocolloid that is zinc oxide?

A

4%

37
Q

Percentage of irreversible hydrocolloid that is potassium titanium fluoride?

A

3%

38
Q

Percentage of irreversible hydrocolloid that is sodium phosphate?

A

2%

39
Q

What is diatomaceous earth?

A

a filler which increases strength and stiffness and produces a smooth texture

40
Q

Do you use adhesive on metal trays?

A

no

41
Q

What do the maxillary preliminary impressions include?

A

-residual ridge
-buccal and labial vestibule
-frenal attachment
-fovea palatinae and vibrating line
-palate
-tuberosities
-hamular notches

42
Q

What do the maxillary preliminary impressions include?

A

-residual ridge
-retromolar pad
-buccal shelf areas
-external oblique ridges
-frenal attachments
-retromylohyloid spaces
-alveololingual sulcus
-labial and buccal vestibules

43
Q

What are the three types of impression philosophies?

A

-minimal pressure
-functional pressure
-selective pressure

44
Q

What is a minimal pressure impression?

A

attempt made to exert as little pressure as possible during impression procedures
-objective is to capture tissues in their most undisturbed and undisplaced form

45
Q

Why are minimal pressure impressions used?

A

thought that if tissues are caught in their undisturbed state, retention and stability of dentures would be increased

46
Q

What type of impression material is used for minimal pressure impression?

A

low viscosity and high flow

47
Q

What are functional pressure impressions?

A

impressions made with the soft tissue under a significant load
-material is more viscous

48
Q

Why are functional pressure impressions made?

A

denture base-tissue contact during function would be more intimate if tissue is recorded under compression

49
Q

What are selective pressure impression ?

A

impressions with pressure on certain areas
-minimal pressure on other areas
-dentist decides where and how much pressure

50
Q

Why do we need a custom tray?

A

-borders can be modified to control the movable soft tissues around the impression and avoid distorting them
-space can be provided inside the tray so that shape of supporting tissue can be recorded

51
Q

What is the purpose of border molding?

A

define denture border in length, width, shape, and contour

Comp Rem Pros - LECTURE (2 decks)

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