Midterm

Question 1

Border molding can use what materials?

Answer 1

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

Question 2

Impression techniques

Answer 2

1. Mucostatic

2. Selective pressure

Question 3

Anterior part of occlusal rim is length of what?

Answer 3

Incisor teeth

Question 4

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

Answer 4

1. Thin in anterior (~5 mm)

2. Thick in posterior (~8 mm)

Question 5

Mandibular wax rims should be what height?

Answer 5

Up 2/3rd retromolar pad

Question 6

Maxillary wax occlusion rim

Answer 6

Ala-tragus and inter pupillary line

Question 7

Four determinants of esthetics

Answer 7

1. Shade
2. Size
3. Form
4. Arrangement

Question 8

Four determinants of esthetics

Answer 8

1. Shade
2. Size
3. Form
4. Arrangement

Question 9

Which two of the four determinants are most important?

Answer 9

Shade and arrangement

Question 10

Describe Dentogenics and SPA

Answer 10

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

Question 11

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

Answer 11

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

Question 12

Advantages of elderly / neutrocentric denture occlusal setups?

Answer 12

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

Question 13

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

Answer 13

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

Question 14

Primary objective for tissue conditioner

Answer 14

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

Question 15

Difference between tissue conditioner and soft liner

Answer 15

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

Question 16

Why do tissue conditioners lose effectiveness?

Answer 16

They leech plasticizer and harden

Question 17

Minimum thickness of tissue conditioner

Answer 17

1.5 to 2 mm

Question 18

Two characteristics that make tissue conditioners effective

Answer 18

Viscosity and viscoelasticity

Question 19

How often should soft liners be changed?

Answer 19

2 weeks

Question 20

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

Answer 20

Six months to reduce friction and sore areas and potential osteoradionecrosis

Question 21

Define stability

Answer 21

Resistance to horizontal forces

Question 22

Define support

Answer 22

Resistance to forces against ventral surface (insertion direction)

Question 23

Define retention

Answer 23

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

Question 24

Interfacial surface tension

Answer 24

Resistance to separation by liquid film between denture and tissue

Question 25

Adhesion

Answer 25

Physical attraction between unlike molecules

Question 26

Cohesion

Answer 26

Physical attraction between like molecules

Question 27

Peripheral seal

Answer 27

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

Question 28

Mechanical engagement in undercut

Answer 28

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

Question 29

What impression material for functional impression?

Answer 29

Tissue conditioner (viscogel or coesoft)

Question 30

What impression material for mucostatic impression?

Answer 30

Zinc oxide

Question 31

What impression material for selected pressure?

Answer 31

Polysulfide

Question 32

Should the lab place posterior palatal seal?

Answer 32

No

Question 33

Five techniques to determine OVD?

Answer 33

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

Question 34

What muscle is engaged when border molding the retromylohyoid region

Answer 34

Palatoglossus

Question 35

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

Answer 35

Orbicularis oris

Question 36

Physiological rest position is?

Answer 36

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

Question 37

Centric occlusion

Answer 37

Occlusion of teeth when patient is in centric relation

Question 38

Centric relation

Answer 38

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.

Question 39

Protrusive records are used to set what on the articulator?

Answer 39

Horizontal guidance

Question 40

Swenson's formula for cusp angle

Answer 40

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

Question 41

Anatomic structures used to approximate distal of maxillary canine are?

Answer 41

Corners of mouth when at rest

Question 42

Maxillary lip is supported by?

Answer 42

Incisal 2/3 of denture teeth

Question 43

``` Linguopalatal sounds Silibant Labial Linguodental Labialdental ```

Answer 43

``` LP: T Silibant: Ch Labial: B Linguodental:Th Labialdental: V ```