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Basic RCD Exam 1 > Midterm > Flashcards

Midterm Flashcards

1
Q

Border molding can use what materials?

A
  1. Impression compound
  2. Elastomeric
  3. Autopolymerizing acrylic resins
  4. Impression wax
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2
Q

Impression techniques

A
  1. Mucostatic

2. Selective pressure

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3
Q

Anterior part of occlusal rim is length of what?

A

Incisor teeth

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4
Q

Width of occlusion rim should approximate that of occlusal table - how thick in anterior and posterior?

A
  1. Thin in anterior (~5 mm)

2. Thick in posterior (~8 mm)

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5
Q

Mandibular wax rims should be what height?

A

Up 2/3rd retromolar pad

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6
Q

Maxillary wax occlusion rim

A

Ala-tragus and inter pupillary line

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7
Q

Four determinants of esthetics

A
  1. Shade
  2. Size
  3. Form
  4. Arrangement
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8
Q

Four determinants of esthetics

A
  1. Shade
  2. Size
  3. Form
  4. Arrangement
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9
Q

Which two of the four determinants are most important?

A

Shade and arrangement

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10
Q

Describe Dentogenics and SPA

A

Esthetic goal of dentistry can be harmonized with a patient’s sex, personality, and age

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11
Q

What are some advantages of young / anatomic denture occlusal setups?

A
  1. Better esthetics
  2. Ease of penetration
  3. Better stability during parafunctional movements
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12
Q

Advantages of elderly / neutrocentric denture occlusal setups?

A
  1. Ease of setup, simpler technique
  2. Reduced lateral forces
  3. Easier adjustments
  4. Permits area of closure
  5. Good for Class II and Class III jaw relations
  6. Good stability, forces centralized and neutralized
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13
Q

Seven non-surgical treatment options for early treatment of abused tissues

A
  1. Rest for denture supporting tissues (no prosthesis for 48-72 hours)
  2. VD correction using resilient lining material
  3. Occlusal correction: distribute forces over wider area
  4. Good nutrition
  5. Oral hygiene (remove candida albicans)
  6. Oral massage
  7. Tissue conditioner
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14
Q

Primary objective for tissue conditioner

A
  1. Treat irritated mucosa supporting a denture
  2. Allow tissue to rebound back to normal position
  3. Act as cushion to support occlusal and parafunctional forces
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15
Q

Difference between tissue conditioner and soft liner

A

Viscosity - Tissue conditioner has greater amount of plasticizer and alcohol and flow more easily

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16
Q

Why do tissue conditioners lose effectiveness?

A

They leech plasticizer and harden

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17
Q

Minimum thickness of tissue conditioner

A

1.5 to 2 mm

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18
Q

Two characteristics that make tissue conditioners effective

A

Viscosity and viscoelasticity

19
Q

How often should soft liners be changed?

A

2 weeks

20
Q

Parotid area radiation in excess of 60 gray should delay denture delivery or tissue conditioner for how long? Why?

A

Six months to reduce friction and sore areas and potential osteoradionecrosis

21
Q

Define stability

A

Resistance to horizontal forces

22
Q

Define support

A

Resistance to forces against ventral surface (insertion direction)

23
Q

Define retention

A

Resistance to forces away from ventral surface (opposite to insertion)

24
Q

Interfacial surface tension

A

Resistance to separation by liquid film between denture and tissue

25
Q

Adhesion

A

Physical attraction between unlike molecules

26
Q

Cohesion

A

Physical attraction between like molecules

27
Q

Peripheral seal

A

Established via border molding - a positive contact of flanges to resilient tissue

28
Q

Mechanical engagement in undercut

A

With proper path of insertion, engage anatomic undercuts to retain denture

29
Q

What impression material for functional impression?

A

Tissue conditioner (viscogel or coesoft)

30
Q

What impression material for mucostatic impression?

A

Zinc oxide

31
Q

What impression material for selected pressure?

A

Polysulfide

32
Q

Should the lab place posterior palatal seal?

A

No

33
Q

Five techniques to determine OVD?

A
  1. Pound’s phonetics and esthetics
  2. Pleasure points
  3. Boos bimeter
  4. Silverman closest speaking space
  5. Lytle neuromuscular perception
34
Q

What muscle is engaged when border molding the retromylohyoid region

A

Palatoglossus

35
Q

What muscle engaged when asking patient to suck on finger while border molding?

A

Orbicularis oris

36
Q

Physiological rest position is?

A

Position of mandible when all muscles are relaxed and patient is upright

37
Q

Centric occlusion

A

Occlusion of teeth when patient is in centric relation

38
Q

Centric relation

A

Maxillomandibular relationship where condyles articulate with the thinnest avascular portion of their respective disks with the complex in the anterior-superior position against the shapes of the articular eminences. This position is discernible when the mandible is in a superior and anterior position. Restricted to a purely rotational movement around the transverse hinge axis.

39
Q

Protrusive records are used to set what on the articulator?

A

Horizontal guidance

40
Q

Swenson’s formula for cusp angle

A

CA = IG + 1/2 (CG - IG)

41
Q

Anatomic structures used to approximate distal of maxillary canine are?

A

Corners of mouth when at rest

42
Q

Maxillary lip is supported by?

A

Incisal 2/3 of denture teeth

43
Q 
Linguopalatal sounds
Silibant
Labial
Linguodental
Labialdental
A 
LP: T
Silibant: Ch
Labial: B
Linguodental:Th
Labialdental: V

Basic RCD Exam 1 (6 decks)

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