WorksheetsREMOVABLE PROSTHODONTICS
Total questions: 40
Worksheet time: 20mins
Name
Class
Date
1.
Factors that influence the form and the size of the supporting bone include the following:
a)
The severity of the periodontal disease
b)
Quantity of saliva
c)
The relative length of time different parts of the jaws have been edentulous
d)
The compliance of the patient
e)
Quality of life
2.
Mandibular stress- bearing areas are:
a)
Firm tuberosities
b)
Buccal shelves
c)
Retromolar pads
d)
Rugae
e)
Hard palate
3.
*To make an ideal impression, the following concepts should be adhered to:
a)
The tissue of the mouth must not be healthy
b)
Proper space for the selected impression material should not be provided within an impression tray
c)
The impression should extend to include the entire basal seat
d)
Border modeling procedure is not necessary
e)
Correct positioning of the impression tray in the mouth doesn’t need a guiding mechanism
4.
The posterior palatal seal:
a)
Create a border seal to decrease the risk of dislodgement of the denture upon speaking and mastication
b)
Is created at the anterior periphery of the denture
c)
A class I palate is the most favorable for denture retention
d)
The tissue can be displaced several millimeters anterior to the vibrating line
e)
A class III palate is the most favorable for denture retention
5.
The neutral zone:
a)
Is recorded in the final impression phase
b)
Occupies a position of equilibrium among the groups of tongue, cheek and lip muscle
c)
Is first established in the wax occlusion rim
d)
It is not a guide for prosthetic teeth position
e)
It is not a guide for the location of a planned denture’s polished surface
6.
The dentist uses occlusion rims to:
a)
Determine the supporting areas
b)
Determine the posterior palatal seal
c)
Determine all potential denture- bearing tissues
d)
Determine the neutral zone
e)
Establish the level of the occlusal plane
7.
A complete denture:
a)
Has five surfaces
b)
Has an impression /intaglio surface
c)
Has a polished surface
d)
The impression surfaces make contact during functional activities
e)
The occlusal surfaces don’t contact during functional activities
8.
*The occlusion rim:
a)
Is frequently contoured labial to the ridge in the anterior region
b)
Is frequently contoured lingual to the ridge in the anterior region
c)
Is frequently contoured labial to the ridge in the premolar region
d)
Is frequently contoured lingual to the ridge in the premolar region
e)
Is slightly labial to the residual ridge in the molar region
9.
The maxillary rim:
a)
Is usually parallel to the interpupillary line
b)
Is usually parallel to the upper lip contour
c)
Is at height that accommodates the length of the natural tooth plus the amount of bone reduction
d)
The pattern of bony reduction is ignored
e)
Doesn’t take into account the interpupillary line
10.
The incisive papilla:
a)
Appear to occupy a stable locale on the palate
b)
Clinical and anthropometric measures indicate that the incisal edges of the maxillary central incisors are 8- 10 mm anterior to the center of the incisive papilla
c)
Clinical and anthropometric measures indicate that the incisal edges of the maxillary central incisors are 4- 5 mm anterior to the center of the incisive papilla
d)
Doesn’ t have a stable position on the palate
e)
The papilla location is not used for central incisor positioning
11.
*Tooth loss will have a pronounced effect on the appearance of the lips and adjacent tissues:
a)
Lips appear to be replenished
b)
There is a noticeable lengthening of the lips
c)
The lower part of the face is not affected
d)
The effect of the degenerative changes in the skin are not obvious
e)
There is a noticeable shortening/ thinning of the lips
12.
In some approaches to occlusal plane determination:
a)
The starting point for establishing the occlusal plane is the maxillary occlusion rim
b)
The incisal plane is parallel to the lower lip line
c)
The occlusal plane, posteriorly, is made to parallel the ala-tragus line
d)
The incisal plane is parallel to the ala- tragus line
e)
The occlusal plane, posteriorly, is parallel to the interpupillary line
13.
The most frequently used tests in establishing the correct VDO by means of occlusion rims are:
a)
Visual observation of the space between the rims when mandible is in physiological rest position
b)
Judgement of the denture stability
c)
Judgement of the support- bearing areas
d)
Old study casts, photographys
e)
Phonetic test that include the “S” sound enunciated accurately and repeatedly
14.
The “ free- way space” :
a)
Is the difference between the mandible physiological rest position dimension and the VDO
b)
Is usually 2- 4 mm when observed at the position of the first premolars
c)
Is usually 6- 8 mm when observed at the position of the first premolars
d)
Is usually 2- 4 mm when observed at the position of the central incisors
e)
The mandible physiological rest position coincides with the VDO
15.
Phonetic tests of the vertical dimensions:
a)
When correctly placed, the lower incisors should move forward to a position nearly directly under and almost touching the upper incisors
b)
If the anterior teeth touch when “ch”, “s” sounds are made, the VDO is too small
c)
If the anterior teeth touch when “ch”, “s” sounds are made, the VDO is too great
d)
If the teeth click together during speech, the VDO is too small
e)
When correctly placed, the lower incisors should move backward
16.
*The average measurements of the distance of the incisive papilla to the incisal edges of the maxillary central incisors are:
a)
2 mm
b)
4 mm
c)
6 mm
d)
8 mm
e)
10 mm
17.
Parallelism of the ridges:
a)
The removal of the teeth tends to leave the residual alveolar ridges nearly parallel to each other
b)
Ridge parallelism is unfavorable
c)
Due to teeth lost at different times, the residual ridges are no longer parallel
d)
The parallelism occurs rarely
e)
Ridge parallelism is causing the dentures to slide anteriorly or posteriorly
18.
*The preliminary centric relation record:
a)
Is made prior the height of the mandibular occlusion plane has been determined
b)
Is made prior the occlusion rims have been contoured
c)
Is made prior the preferred interocclusal space has been established
d)
Is made prior the final impression
e)
Will be transferred to an articulator
19.
The materials used for the static interocclusal records of centric relations in complete denture:
a)
The materials do not harden to provide a “ check- bite” record
b)
The consistency of the material must not offer resistance during mandibular closure
c)
The material must not inadvertently guide the path of the mandible
d)
The material must not support the models during the mounting process
e)
The material must not retain the relationship between the occlusion rims
20.
The simple hinge articulator in complete dentures:
a)
The instrument itself is not rigid
b)
Can be relied on to preserve the centric relation position precisely
c)
Occlusal contacts in centric relation can be perfected
d)
Can be used to relate the occlusal surfaces in excursive movements
e)
Refining non- working side contacts for balanced occlusion is possible
21.
*When alginate is used for preliminary impression for removable partial dentures the amount of clearance between the tray and the oral tissues is:
a)
1-2 mm
b)
2-3 mm
c)
3-4 mm
d)
4-5 mm
e)
None of the above
22.
Stock trays can be used for final impressions when obtaining a removable partial denture if:
a)
The selected tray has suitable clearance from oral tissues for the selected impression material
b)
The selected tray has sufficient coverage of the impression area
c)
The selected tray is flexible
d)
The selected tray does not require customization by border molding
e)
The denture is constructed without any mouth preparations
23.
When taking a final impression for removable partial denture one can use the following types of trays:
a)
Custom tray made of self-curing acrylic
b)
A stock tray
c)
Custom tray made of light-curing urethane dimethacrylate
d)
Flexible tray
e)
None of the above
24.
Advantages of custom trays:
a)
hey are rigid and dimensionally stable
b)
They are flexible and dimensionally stable
c)
They are tailored to the impression area
d)
The clearance between the tray and the tissues can be adjusted prior to fabrication
e)
They can be used in conjunction with adhesive agents
25.
Functional final impressions for partial removable dentures are mostly indicated for:
a)
Mandibular Kennedy Class I
b)
Mandibular Kennedy Class III
c)
Mandibular Kennedy Class II
d)
Maxillary Kennedy Class III
e)
None of the above
26.
The single tray functional impression technique for removable partial denture:
a)
Uses a custom tray
b)
Uses a stock tray
c)
Is a time saving technique
d)
Produces a hybrid cast
e)
Is a relatively complicated technique
27.
The altered cast technique for obtaining a removable partial denture:
a)
Starts with a conventional impression
b)
Is a multistep procedure
c)
All the denture parts are made on the same cast
d)
The laboratory work is complicated
e)
Does not involve cutting the initial cast
28.
When taking the impression for removable partial denture:
a)
The tray should be positioned with mild finger pressure
b)
The tray should be kept still with fingers on the premolar area
c)
Lips should be pulled to cover the impression tray
d)
When removed, the tray should be pulled perpendicular to the long axis of teeth
e)
Cleaning and disinfection is not mandatory
29.
For removable partial dentures, the alginate material:
a)
Is an acceptable choice for final impression
b)
Delivers fair surface details
c)
Cannot be use for final impression
d)
Doesn’t need to be poured immediately
e)
Has strong tear resistance
30.
The altered cast technique for obtaining a removable partial denture:
a)
The metal framework is used to make the impression of the free-end edentulous spaces
b)
The acrylic saddles are used as individual trays
c)
Pressure should be applied on the saddles
d)
Pressure should not be applied on the metal framework
e)
The acrylic saddles require border molding
31.
*The characteristics of the major connector for removable partial denture include:
a)
Flexibility
b)
Smooth and round line angles
c)
Interference with movable tissue
d)
Use of marginal gingiva for support
e)
Allow food entrapment
32.
*In the mandibular arch, the borders of the major connector in relation to the free gingival margin should be placed:
a)
1-2 mm
b)
2-3 mm
c)
3-4 mm
d)
4-5 mm
e)
5-6 mm
33.
*In the maxillary arch, the borders of the major connector in relation to the free gingival margin should be placed:
a)
8 mm
b)
2 mm
c)
4 mm
d)
6 mm
e)
None of the above
34.
Lingual bar of a removable partial denture:
a)
Has a triangular shape in cross section
b)
Is flexible
c)
Can be used in every clinical situation
d)
Has a height of 4 mm
e)
Has a thickness of 2 mm
35.
Indirect retainers for removable partial dentures:
a)
Prevent displacement of the denture away from the tissues
b)
Need to be positioned perpendicular to the fulcrum line
c)
Need to be positioned close to the fulcrum line
d)
Are required in Kennedy Class I, Class II dentures
e)
Can be incisal or cingulum rests
36.
The Akers clasp:
a)
Is a circumferential clasp
b)
Is a bar clasp
c)
Is an infrabulge clasp
d)
Is a suprabulge clasp
e)
Is an RPI clasp
37.
The functions of a clasp assembly:
a)
Retention
b)
Parallelism
c)
Encirclement
d)
Flexibility
e)
Resistance
38.
A retentive clasp used in a removable partial denture has the following parts:
a)
A reciprocal element
b)
A survey line
c)
A body
d)
A rest
e)
A retentive arm
39.
An occlusal rest used in removable partial denture:
a)
Does need a preparation on the lingual side of the canine
b)
The recommended size is ¼ the buccolingual width of the tooth
c)
The angle between the floor of the rest and the minor connector should be greater than 90°
d)
The shape of the rest should be spoon shaped from the sagittal view
e)
The recommended size is 1/3 to ½ the mesiodistal diameter of the abutment
40.
Rest are used in removable partial denture to:
a)
Act as indirect retainers
b)
Transmit occlusal forces from the prosthesis to an abutment along the long axis of the tooth
c)
Resist the denture base movement toward the gingival tissue
d)
Favor extrusion of unopposed abutment teeth
e)
Maintain clasps in the desired positions
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