Week 2

Question 1

List 5 types of maxillary major connectors.

Answer 1

Anterior-posterior palatal strap
Single palatal strap
Modified full palatal
Complete palatal coverage
U-shaped/Horseshoe

Question 2

List 3 types of mandibular major connectors

Answer 2

Lingual bar
Lingual plate
Labial bar (swinglock)

Question 3

Name the Kennedy classification and the major connector that you might choose for the following situation:

Missing 3, 4, 12, 13
No torus palatinus
Perio fine

Answer 3

Class III, mod 1

Palatal Strap

Question 4

Name the Kennedy classification and the major connector that you might choose for the following situation:

Remaining teeth 6-11.
No torus palatinus
Posterior ridges fairly resorbed

Answer 4

Class I

Full palatal coverage

Question 5

Name the Kennedy classification and the major connector that you might choose for the following situation:

Remaining teeth 4-13
Midpalatal torus palatinus
Perio good
Ridge support good

Answer 5

Class I

Horseshoe or AP palatal strap

Question 6

Name the Kennedy classification and the major connector that you might choose for the following situation:

Missing teeth 6-10
Torus palatinus present
Perio good

Answer 6

Class IV

Horseshoe or AP palatal strap

Question 7

Name the Kennedy classification and the major connector that you might choose for the following situation:

Remaining teeth 20-28
Depth of floor of mouth = 8 mm
Perio good
No tori

Answer 7

Class I

Lingual bar

Question 8

Name the Kennedy classification and the major connector that you might choose for the following situation:

Remaining teeth are 22-26
Depth of floor of mouth = 6mm
Teeth 24 and 25 exhibit approximately 30% bone loss radiographically

Answer 8

Class I

Lingual plate or swinglock

Question 9

Which mandibular major connector is the most comfortable for patients?

Answer 9

Lingual bar

Question 10

Which maxillary major connector is the most rigid for the amount of tissue covered?

Answer 10

AP palatal strap

Question 11

Which maxillary major connector is the least desirable due to the amount of flexure inherent to the design?

Answer 11

Horseshoe

Question 12

In general, ______________ are the clasp of choice for tooth born (supported by teeth on both sides of the edentulous space) removable partial denture.)

Answer 12

cast circumferential clasps

Question 13

A lingual bar needs how much space from the FGM to the floor of the mouth?

Answer 13

7 mm

Question 14

In general, ___________________ is preferred for replacement of posterior teeth unless there is limited interocclusal space.

Answer 14

open lattice denture base retention

Question 15

Where are horizontal struts placed?

Answer 15

between teeth, ideally

Question 16

Proximal plates have the same width as _____________..

Answer 16

occlusal rests

Question 17

What is the width of proximal plates/occlusal rests?

Answer 17

1/2 the width of the occlusal table or 1/3 of the total tooth width

Question 18

Where is the inferior border of the reciprocal arm positioned?

Answer 18

at the height of contour

Question 19

_____________ engages an abutment tooth to resist displacement of the RPD away from the tissues.

Answer 19

Direct retainer

Question 20

What is an advantage of the key and keyway retainer?

Answer 20

esthetics

Question 21

Disadvantages of intracoronal retainers? (5)

Answer 21

requires castings
complicated clinical/lab
difficult to repair
additional expense
may require splinting of several teeth

Question 22

4 parts of the basic clasp type retainer

Answer 22

Rest
Retentive arm
Reciprocating arm (or alternative reciprocation)
Guiding plate

Question 23

Clasp of choice for Kennedy Class III?

Answer 23

Cast circumferential clasp (because of its excellent support, bracing, and retentive properties.

Question 24

Type of clasp indicated for Kennedy Class II or III RPDs with no modification spaces?

Answer 24

Embrasure clasp

Question 25

Six requirements for every direct retainer or clasps assembly

Answer 25

``` Support Stabilization Retention Adequate encirclement Reciprocity Passivity ```

Question 26

Adequate encirclement = greater than ________ degrees

Answer 26

180

Question 27

Describe open lattice denture base retention.

Answer 27

Two longitudinal struts extending along edentulous ridge one strut buccal and one strut lingual to crest of ridge.

Question 28

What type of denture base retention is used when space is an issue?

Answer 28

Mesh

Question 29

Which retains acrylic better - open lattice or mesh?

Answer 29

Open lattice

Question 30

_____________: cast so fit on risge; no acrylic is packed underneath; retention is gained by metal projections on the metal surface

Answer 30

Bead, wire or nailhead

Question 31

Butt acrylic teeth not indicated for Kennedy Class ______

Answer 31

I or II

Question 32

External finish lines should be _______, definite, and slightly ________ to adhere to resin; angle of finish line with major connector should be less than _____ degrees.

Answer 32

sharp undercut 90

Question 33

Contour teeth using hand instruments on casts so that the height of contour is in the ___________ third.

Answer 33

middle