Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

Removable Partial Dentures > BioMechanics/Design for Kennedy Class I and II > Flashcards

BioMechanics/Design for Kennedy Class I and II Flashcards

1
Q

_______ forces acting on teeth are thought to be biologically conducive to bone stimulation and periodontal health; these forces are distributed to the surrounding bone via Sharpey’s fibers.

A

Vertical

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Forces ________ transmitted to teeth are destructive and apply prying or “lever-like” vectors

A

laterally

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

A distal rest, circumferential retainer and a distal extension = WHAT TYPE OF lever

A

Class I lever = destructive-lateral forces

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

***the SAGITTAL plane makes the ________ axis (aka ________ axis)

A

MedioLateral axis (transverse axis)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

***the FRONTAL plane makes the ________ axis (aka _______ axis)

A

AnteriorPosterior Axis (sagital axis)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

*** the HORIZONTAL plane makes the ________ axis

A

Vertical axis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

IMPORTANT CONCEPT: The sagittal plane and its MedioLateral Axis when applying a down force are concerned with ______ of the denture (so rests and soft tissue)

A

SUPPORT

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

IMPORTANT CONCEPT: The sagittal plane and its MedioLateral Axis when applying an UP force are concerned with ______ of the denture (so rests and soft tissue)

A

Retention

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

IMPORTANT CONCEPT: What three components to an RPD are focused on retention when an upward force is applied via the Sagittal plane?

A

retentive arm, indirect retainer and soft tissue (some)s

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

IMPORTANT CONCEPT: The horizontal plane is concerned with _______ of the RPD. What are the three components that aid in this?

A

stability…minor connector, rest seats, soft tissue

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

IMPORTANT CONCEPT: the frontal plane is concerned with ________ of the RPD. What are the two components that aid in this?

A

stability…teeth and soft tissue

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

A ______ consists of a rigid bar, a fulcrum, an object to be moved, and an applied force

A

lever

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

A _____ class lever has the potential to be very efficient, and the _____ class lever the least efficient

A

first…third

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Which three Kennedy classes function around levers?

A

I, II, IV

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

The ______ the extension base, the greater the potential for damaging loads to be generated on the opposite side of the fulcrum line

A

longer

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

WHICH FULCRUM?? Extends through two principle abutments, one on each side of the arch.

A

horizontal fulcrum (principle fulcrum line)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Which FULCRUM controls rotational movement of the denture in sagittal plane (denture movement toward or away from the supporting ridge)?

A

Horizontal Fulcrum (principle fulcrum line)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Which FULCRUM line extends through the occlusal rest on the terminal abutment and along the crest of the residual ridge, on one side of the arch.

A

Horizontal Fulcrum Line

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Which FULCRUM line controls rotational movement of the denture in Frontal plane (a rocking movement over the crest of the ridge)

A

Horizontal Fulcrum line

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Which FULCRUM line extends vertical just lingual to the anterior teeth and in the vicinity of the midline.

A

the vertical fulcrum

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Which FULCRUM line controls rotational movement of the denture in horizontal plane??

A

the Vertical fulcrum line

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Which FULCRUM line is almost entirely horizontal forces, so extremely damaging??

A

Vertical Fulcrum line

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

EVERY EFFORT should be made to keep a ________ as a vertical stop.

A

posterior abutment

24
Q

The thickness and health of the _________ influences the loads transferred to abutment teeth

A

mucoperiosteum

25
Large, well formed _____ are capable of withstanding greater loads than are small, thin, or knife edged ridges
ridges
26
The more _____ the clasp the less the force to the abutment tooth but the greater the forces to the residual ridge
flexible
27
Which material clasp places a small percentage of the load on the abutment, and a greater percentage on the residual ridge?
Wrought Wire
28
Framework must be fully SEATED for the clasp to be totally ________
passive
29
________ clasp must contact the tooth before and while the retentive tip passes over the undercut
Reciprocal
30
The longer the clasp the more flexible it is (Double the length will increase flexibility ___ times)
5 times
31
A _______ based alloy will exert a greater load on the abutment teeth than will a gold alloy
chromium
32
INTERESTING!!! The surface of a ______ restoration offers MORE frictional resistance to clasp arm movement than does the _______ surface of a tooth, therefore a crowned tooth experiences (GREATER/LESSER?) stresses than one with intact enamel!!
cast gold...enamel...GREATER
33
REVIEW from Complete Dentures...What are the 2 primary bearing areas on the maxilla? What is the primary bearing area on the mandible?
Max: Hard Palate and ridge crests Mand: buccal shelves
34
WHAT TWO LANDMARKS (1 Mx, 1Md) need to be covered by acrylic for support of the RPD???
the tuberosity on the maxilla, the retro-molar pad on the mandible
35
What is the standard amount of undercut used for MOST clasps?? What about for the odd ball wrought wire?
0.01" for MOST...0.02" for WW
36
What is the gauge of Wrought Wire?
18 gauge
37
BOOO....Use ______ rests rather than ______ rests to reduce lever arm.
cervical RATHER THAN incisal
38
Place RETENTIVE and RECIPROCAL clasps near the junction of the _______ and _______ thirds of the abutment.
middle and cervical
39
DONE BE THAT PERSON!!!! Do not place retentive components anterior to the ________!
fulcrum line
40
WHY NO Retentive clasp ANTERIOR TO the FULCRUM line?Clasp components located posterior to the fulcrum line axis move _______ during occlusal loading
gingivally
41
WHY NO Retentive clasp ANTERIOR TO the FULCRUM line? Clasp components located anterior to the fulcrum line axis move ________ during occlusal loading
occlusally
42
During function: The Akers clasp arm and proximal plate move in a __________ direction disengaging from the tooth
mesiogingival
43
As an occlusal load is placed the I bar clasp arm and the proximal plate move in a ________ direction disengaging from the tooth
mesiogingival
44
IFFF Retention is to be used ANTERIOR to the fulcrum line, a _______ (______) clasp is the only acceptable retainer.
wrought wire (combination)
45
A retainer ANTERIOR to the fulcrum line: A wrought wire will limit the torquing action due to its _______
flexibility
46
WHAT ARE THE 4 components of an RPD that provide SUPPORT????
1.Rest 2.Major Connector 3.Denture base 4.Teeth through the base
47
These components.....Guide Plate (Proximal Plate) Lingual Plates, Rest, Rigid portions of retainers, Direct Retainers, Major Connector, Minor connector, Denture Bases .......are all providing ________
Stability
48
What are the two components of an RPD providing RETENTION?
1.Direct Retainers 2.Guide plate (proximal plate)
49
In a Kennedy Class I or II, what are the 3 times you CANNOT use an RPI??? What would you turn to instead?
1.Frenum 2.Shallow Vestibule 3.Deep soft tissue undercut...use an RPA!
50
IN a Kennedy Class I or II, what are the 3 times you CANNOT use an RPA? What would you use instead?
1.Rotation 2.heavy centric contact on mesial 3.Large amalgam restoration on mesial...use a COMBINATION clasp
51
A distal guiding plane EXTENDS FROM the ________ to the junction of the ______ and ______ thirds of the abutment tooth. (SO it leaves a GAP on the gingiva!!)
MARGINAL RIDGE to the junction of the MIDDLE and GINGIVAL thirds
52
RPI: The proximal plate, in conjunction with the minor connector supporting the rest, provides the ________ and ________ aspects of the clasp assembly
STABILIZING....RECIPROCAL
53
RPI: The area of contact, along with the rest and proximal plate contact, provides stabilization through _________.
encirclement
54
I BAR: The HORIZONTAL portion of the approach arm must be located at least ___mm from the gingival margin
4mm
55
With the RPA clasp system the circumferential clasp is placed so that the rigid portion of the clasp arm will contact the tooth only along its _______ border at the level of the survey line.
superior

Removable Partial Dentures (7 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions