Midterm

Question 1

The Maxillary ridge resorbs ____ and ____

Answer 1

Superiorly and Medially
or
Vertically and Palatally

• The remaining arch appears to have moved UP and BACK)

Question 2

The Mandibular ridge resorbs ____ and ____

Answer 2

Inferiorly and Laterally

- The remaining arch appears to have moved DOWN and OUT

Question 3

Two factors that affect mandibular retention when compared to the maxilla are ____ and ____

Answer 3

1. Surface area
   - Maxilla = 22.96cm^2
   - Mandible = 12.25cm^2
2. Muscle insertions
   - Makes tissues less stable

Question 4

The primary stress bearing area of the mandible is the ____

Answer 4

Buccal shelf

Question 5

The secondary stress bearing area of the mandible is the ____

Answer 5

Residual Ridge

Question 6

What muscle limits the labial flange?

Answer 6

Mentalis

Question 7

The bony landmarks of the retromolar region include:

Answer 7

1. Retromolar triangle

2. Retromolar fossa

Question 8

The soft tissue landmarks of the retromolar region include:

Answer 8

1. Retromolar papilla
2. Retromolar pad
3. Pear-shaped pad (only found in edentulous mouth)

Question 9

What is the desired outcome from an impression?

Answer 9

1. Retention - Resistance to movement of the denture away from the ridges
2. Stability - Resistance to horizontal and rotational movement
3. Support - Resistance to movement in a vertical direction towards the tissue

Question 10

What is the purpose of bordermolding?

Answer 10

To capture the functional extension of the denture in the vestibular areas as accurately as possible so the final prosthesis can have maximum extension without impinging on the functional movement or intraoral tissues

Question 11

What three points of reference are necessary in order to make an acceptable face-bow recording?

Answer 11

1. External auditory meatus
2. Frankfurt horizontal
3. Plane of occlusion

Question 12

The Plane of Occlusion is determined by what three factors?

Answer 12

1. The Fox Plane
2. 2/3 height of the Retromolar Pad
3. Position of the border of the tongue

Question 13

Occlusion rims act as:

Answer 13

1. A vertical stop when making records
2. A table to support the recording material
3. A means of reliably positioning the master casts on the articulator in the same 3D relationships that exist in the mouth

Question 14

Excessive VDO will result in:

Answer 14

1. Clicking of teeth
2. Soreness of ridges
3. Muscles tired and strained
4. Feeling of excessive bulk
5. Unsightly display of denture base and teeth

Question 15

Insufficient VDO will result in:

Answer 15

1. Cheek biting
2. Chin jutting forward
3. Mandibular lip anterior to maxillary lip
4. Angular cheilosis
5. TMD problems

Question 16

What are the two controlling factors of the articulator?

Answer 16

1. Inclination of Condylar Guidance

2. Inclination of Incisal Table

Question 17

The Inclination of Condylar Guidance is obtained with a ____

Answer 17

Protrusive record

Question 18

The Inclination of the Incisal Table is determined by ____

Answer 18

The vertical and horizontal overlap of the incisors

Question 19

The greater the horizontal overlap of the anterior teeth, the ____ the inclination of the incisal table

Answer 19

Less

Question 20

What are some indications for non-anatomic teeth?

Answer 20

1. Older individuals with wandering centric position
2. Class II ridge relationships
3. In reverse occlusion situations (cross-bite)
4. Where the patient has lost a great deal of alveolar ridge and the future dentures will have minimal lateral stability

Question 21

What is the primary method of setting teeth at UNMC?

Answer 21

Lingualized (“Lingual contact”) Occlusion

Question 22

What are indications for selecting anatomic posterior teeth?

Answer 22

1. When dislodgement of the denture will occur during protrusive movements
2. When a patient presents with old dentures that had anatomic teeth with balance and desires the same setup

Question 23

What are some advantages of Acrylic Resin denture teeth?

Answer 23

1. Chemically bonds to denture base
2. Universal application
3. Can be ground readily to accommodate limited inter-arch space
4. Less noise when chewing
5. Do not fracture easily

Question 24

What are some disadvantages of Acrylic Resin denture teeth?

Answer 24

1. Wear more easily than porcelain

2. Stain more easily than porcelain

Question 25

What are some advantages of Porcelain denture teeth?

Answer 25

1. More resistant to wear 2. Lower cost (not a big factor) 3. Flat plane posteriors stay sharper for easier penetration of food

Question 26

What are some disadvantages of Porcelain denture teeth?

Answer 26

1. Fracture easily 2. Noisy when chewing 3. Cannot be used when limited space is available between maxillary and mandibular arches 4. Hard to grind 5. More shock imparted to fragile tissue 6. Does not chemically bond to denture base 7. Hard to repair 8. Eventual leakage between tooth and resin creating a black or brown line

Question 27

``` Physiologic tension (e.g. via natural dentition) results in ____ Non-physiologic compression (as in dentures) results in ____ ```

Answer 27

Apposition | Resorption

Question 28

Mandibular resorption is ____ the maxillary

Answer 28

4x that of the maxillary

Question 29

Clinical consequences of complete edentulism include

Answer 29

1. Moderate to severe bone loss 2. Reduced chewing function 3. Poorly fitting dentures and sore spots 4. Digestive and Nutritional problems 5. Moderate to severe weight loss

Question 30

Psychological effects of edentulism include

Answer 30

1. Premature aging 2. Less enjoyment of foods 3. Lowered self confidence 4. Socially inhibited 5. Seldom laugh 6. Change in personal relationships 7. Poor self image 8. Secrecy of oral situation 9. Worry, fear, and embarassment

Question 31

What House classification of patients is most likely to have realistic expectations for their dentures?

Answer 31

Philosophical - rational, sensible, organized Opposite would be Exacting

Question 32

Timeline of denture making:

Answer 32

Preliminary impressions + Pour >>> Primary cast Fabricate custom impression trays Border-mold custom impression trays Final impressions + Pour >>> Master cast Fabricate record bases (triad) and occlusion rims (wax) MMR Mount master cast on articulator + Set teeth Try-in + Correct arrangement Process denture in lab Evaluate surfaces and esthetics Evaluate fit and eliminate pressure areas/overextensions

Question 33

Evidence-based dentistry has three major guiding principles

Answer 33

1. Best available evidence 2. Individual clinical experience 3. Patient values