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Partial denture 1

A detailed illustration of partial dentures and dental anatomy, showcasing different types of clasps, major connectors, and jaw movements, in a professional and educational style.

Mastering Partial Dentures Quiz

Test your knowledge on partial dentures with our comprehensive quiz! This engaging and educational quiz consists of 101 carefully crafted questions that cover a wide range of topics essential for dental professionals and students alike.

Challenge yourself with questions on:

Clasp designs and applications
Major connector functions and requirements
Mandibular and maxillary anatomy
Rest preparation techniques

101 Questions25 MinutesCreated by LearningDental101

A clasp most common use is?:

Ring clasp

Back action clasp

Aker clasp

Embrasure

Infrabulge clasps originate:

above the 12mm undercut areas

above the occlusal surface of most premolars

above the height of contour

below the height of contour

Reciprocation between bracing and retentive components requires:

I bars be used

Aker clasp be used

Bracing components contacts after retentive components

Correct timing of contact during seating and removed of RPD

The basic movement of mandible:

hinge movement

lateral movement

hinge ,lateral and translatory movement

Maxillary major connectors most common use is:

full palatal strap

palatal strap

anterior posterior palatal strap

anterior palatal strap

Anterior posterior palatal strap especially use is:

maximum rigidity

maximum bulk

use in most cases

torus palatal

Which of the following maxillary major connectors possesses the least strength and rigidity?:

anterior posterior palatal strap

palatal plate

horse –shoe

modified palatal strap

Which of the following clasps commonly utilize lingual undercut?:

Extended arm clasp

Back action clasp

Embrasure clasp

Ring clasp

The external finish line is:

the external of framework metal and denture base plastic

the external of framework metal and supporting tissues

the external of framework metal and the natural teeth

the external of the natural teeth and the denture base plastic

. Functions of a Major connector:

component of RPD connect to acrylic resin

kind of metal chrome cobalt

functions as one unit

unification, stress distribution, cross arch stabilization

Requirements of a Major connector:

connects various parts

distributes functional loads to both teeth and mucosa

partial denture acts as one unit

rigidity, non interference with tissues, minimize food impaction and unobtrusive

The superior border of mandibular lingual bar major connector should be:

at least 3mm from the tooth/ tissue junction

at least 3mm from the tooth/ junction

as far from gingival margin as possible

at least 3mm above the tooth/ junction

. The internal finish line is:

the butt joint between the metal and resin acrylic on the tissue side of the edentulous area

the butt joint between the metal and resin acrylic on the outer surface of the RPD

a type of posterior palatal seal

a special type of above

. A combination clasp assembly generally has:

a bracing arm , a retentive arm and rests

a retentive arm ,rests and indirect retainer

rests, a retentive arm and proximal plate

rests , a bracing arm and proximal plate

The external finish line on a maxillary class 1 RPD originates from the lingual of the guide plane of the terminal abutment and ends:

at the hamular notch

in the glenoid fossa

opposite the buccal pouch

opposite stenon’s duct

The Gridwork of Minor Connector on a maxillary class 1 RPD:

covers the hamular notch

covers the tuberosity

does not cover the tuberosity

covers the crest and tuberosity

. Occlusal rest preparation should be:

spoon shaped, at least1/3 the bucco lingual width of the occlusal surface, at least 1m deep

flat shaped, at least1/3 the bucco lingual width of the occlusal surface, at least 1mm deep

pear shaped, at least 1/2 the bucco lingual width of the occlusal surface, at least 15mm deep

teardrop shaped, at least 1/2 the bucco lingual width of the occlusal surface, at least 15mm deep

A lingual plate major connector may be selected be cause

the mandibular incisors are tilted lingually, mandibular tori present, high lingual frenum

the mandibular incisors are tilted facially, high floor of the mouth

the mandibular incisors are tilted facially, mandibular tori present ,high lingual fremum

The mandibular incisors are tilted lingually ,high floor of the mouth, high lingual frenum

. An anterior posterior palatal strap major connector is less rigid than a horseshoe major connector because it (the AP strap) has less width:

The first statement is true but the reason is false

The first statement is false and the reason is also false

The first statement is true and the reason is true

The first statement is false but the reason is true

In a circumferential clasp assembly, the arms may extend into an undercut:

The bracing arm

The reciprocating arm and retentive arm

The bracing arm and retentive arm

The retentive arm

Which of the following steps is done LAST ?:

Rest preparation

Framework try in

Centric relation records

Altered cast impression

Direct retainer (clasps):

help stabilize the RPD by controlling occlusal movement

Help stabilize the RPD by controlling gingival movement

may also function as indirect retainers

prevent excessive biting forces on the abutment

What are the indications for a linguo plate as a major connector for a mandibular RPD?:

Present high floor of the mouth and facially anterior teeth

Present high lingual frenum and buccally anterior teeth

Present lingual tori and big tongue

High floor of the mouth, high lingual frenum, lingual tori

Incisal rests should generally not used on maxillary incisors Why?:

for mandibular class 4 kennedy only

For maxillary class 4 kennedy only

for maxillary and mandibular class 1 and 2 kennedy

poor esthetics and interferences with opposing occlusion

Component of a clasp assembly are:

One rest, a retentive arm , a bracing or reciprocating element, one minor connector

One or two rests, a retentive arm, a bracing or reciprocating element, one minor connectors, one major connector

One minor connector, one major connector, one rest, two rests, one retentive arm, one bracing arm

Two minor connectors, one major connector , one rest, one retentive arm, one bracing or reciprocating element

The basic philosophy of dental treatment for a partially edentulous patient:

Preserve what remains and restore what is missing

Replace the missing teeth

Improve the path of insertion

Reshape rotated teeth

Full palatal plate:

Minimum tissue support

Connector of choice in short distal extension cases

Six or more anterior teeth remain

Six or less anterior teeth remain

Maximum tissue support , connector long distal extension cases, six or less anterior teeth remain

Physiologic Rest is a position of vertical dimension which can be recorded with:

Centric relation

Centric occlusion or MIP

Edge to edge incisor contact

Posselt’s envelope

A jaw which is moving in a ”left or right” motion would be called what type of movement:

lateral pure hinge

lateral protrusion

Lateral

horizontally protrusive

The condyle on the working side is called the working condyle, which is also known as the:

orbiting condyle

balancing condyle

rotating condyle

translatory condyle

Considering the design of an RPD for the mandibular arch…:

Survey crowns should be done to correct the mesial tilt of the molar

Retentive clasps are required next to each edentulous space

The lingual plate would be the major connector of space

Dual path of insertion should be considered

Which one of the following Kennedy classes of RPD, never has an axis of rotation?:

class I of Kennedy

class II of Kennedy

class III of Kennedy

class IV of Kennedy

A class I modification 0 of RPD normally are have many clasps?:

1 clasp

2 clasps

3 clasps

4 clasps

Cleaning a removable partial denture in sodium hypochlorite may result in:

increased caries activity

increased periodontal problems

whitening acrylic resin and artificial teeth

corrosion of the metal the framework

During biting a maxillary class I RPD with rotate around a line determined by the rigid metal above the survey line and closed to the extension areas This line is called:

Dual path line

Frankfurt line

Camper’s line

Axis of rotation

Mandibular gridwork design of minor connectors:

Maximum bulk of the acrylic resin

Prevents thin, edges fracturing

Extend fully to the hamular notch

extend 2/3 of the way from abutment tooth to retromolar pad

. The correct answer the basic movements of the mandible:

Hinge, chewing and yawing

Translatory movements relative to centric relation

Lateral, dimension, excursion

Hinge , lateral and translatory movement

A mandibular movement which is<< either opening or closing motions of the mandible around a horizontal axis that is common to both condyles >> would be best classified as a…………movement:

translatory excursion

centric relation

Lateral

Hinge

Protrusive or Retrusive movements can also be called………………movement:

translatory or vertica

translatory or shifting

translatory or sliding

sliding crossbite excursions

When the survey line is height on the Mesial or Distal but low on the center, which one design clasp:

I clasp

Y clasp

T clasp

U clasp

More acceptable esthetically and less caries formation for bar clasp is:

Y clasp

I clasp

T clasp

U clasp

Est selection of preventing abutments tooth of class I Kennedy from the negative effects of the additional load applied to them is by:

Splinting abutment with adjacent teeth

Placing distal rests on the distal abutment

Keeping a light occlusion on the distal extensions

Regular relining of distal extensions

When designing palatal connectors, relief should be given for:

Ridge area

Elevated mid suture line

Rugae area

Palatal torus

For the preparation of rest seat:

Marginal ridge should be reduced by 25 mm

Marginal ridge should be reduced by 1 mm

The outline to have greater length than width

The outline to have greater width than length

Which of the following chronic conditions may cause tooth abrasion?:

Pipe smoking

Occlusion trauma

Hard brush using and strong brushing

Strong mastication

Tripod of dental surveyor is the method used:

For giving clasp assemblies at 3 points

Determine the undercut areas on the tooth

Surveyor to have reproducible position of the cast on the surveyor

Surveyor for recording the relation of the cast to the surveyor

What are the typical positions of the maxillary and mandibular teeth, and the tongue during empty mouth swallowing?:

Centric occlusion, the tongue touches the palate

Occlusion, the tongue touches the lingual aspects of the anterior teeth

Retruded contact, the tongue touches the palate

Retruded contact, the tongue touches the lingual aspects of the anterior teeth

Mesh type of grid work minor connectors is:

Potentially superior retention

Interferes with setting of teeth

Struts are too thick

Potentially more rigid

Lattice type of grid work minor connectors is:

Flatter

Potentially more rigid

Less retention for acrylic resin

Potentially superior retention

The kennedy classification of this RPD is

class IV mod II

class II mod I

class I mod II

Class I mod I

The kennedy classification of this RPD is:

Kennedy class II

Kennedy class I

Kennedy class I mod I

kennedy class II mod I

The Kennedy classification of this RPD is:

Kennedy class III

Kennedy class III mod I

Kennedy class IV mod I

Kennedy class II mod I

The Kennedy Classification for this cast is:

Class III mod I

class III mod II

class III

class III mod III

Considering the design of an RPD for the mandibular arch

Survey crowns should be done to correct the mesial tilt of the molars

Retentive clasps are required next to each edentulous space

The lingual plate would be the major connector of space

A dual path of insertion should be considered

What is a RPD component is not needed in this type of case?:

Major connector

Guide planes

Direct retainers

Indirect retainers

If this RPD was fabricated exactly as drawn on the design cast, which component(s) would be nadequate?:

Minor connectors

lingual bar

Direct and Indirect retainers

All are correct

The denture base acrylic resin minor connector on the patient’s left side should correctly be located:

2/3 to ½ the length of the residual ridge

On the retromolar pad

1/3 the length of the residual ridge

Have a mesh acrylic retention area

The external finish lines on this framework are:

Indistinct

Would allow for acrylic and meta

too deep or over contoured

Correct

The superior border of this major connector:

Is not acceptably adapted to the teeth

Is correctly adapted to the teeth

is too low

is too small

Which of the following is missing from the clasp on #45?:

Minor connector

Rest

Reciprocating arm

Retentive clasp arm

The major connector in this mandibular class I removable partial denture:

Is to long occlusal gingivally

Is too close to the free gingival margin

Is missing an indirect retainer

All are correct

The major connector in this mandibular class I removable partial denture:

Is a lingual bar and its superior border is too close to the free gingival margins

Is a lingual bar and its superior border is placed correctly

Is a lingual bar and the placement of the superior border of the lingual bar is of no importance to the soft tissues

Is a lingual bar too short and too close the free gingival margin

In this Class I mandibular removable partial denture, rests preparations on the cingulum of (#33+):

Would provide indirect retention for the removable partial denture if covered by the major connector

Would provide indirect retention for the removable partial denture

Are not indicated in this case

Are correct if rests preparations are good

A lingual plate major connector may be selected be cause:

the mandibular incisors are tilted lingually

there are mandibular tori present

there is a high lingual frenum

All are correct

Occlusal rest preparation should be:

spoon shaped

at least 1/3 the bucco lingual width of the occlusal surface

At least one millimetre deep

All are correct

Incisal rests:

a generally more positive vertical stops than cingulum rests

may interfere with the opposing occlusion

Hould not be used on maxillary incisors

All are correct

In which of the following mandibular positions are the teeth in contact?

Centric Relation and Centric Occlusion

Edge to Edge Incisor Contact

Maximum Mandibular Protrusion

Negative, Horizontal and Vertical Overlaps at incisors

All are correct

A clasp assembly should:

have a retentive arm with adequate length and taper for flexibility

have a retentive arm that terminates in an undercut

have elements that considered together provide 180 degree encirclement

All are correct

Reason (s) for selecting lingual plate major connectors is/are?:

the presence of lingual tori

Anticipated loss of one or more of the remaining teeth

A high lingual frenum

All are correct

. Function of the teeth is /are:

Mastication

Phonation

Esthetic

All are correct

Indication of Removable Partial Denture:

Large edentulous space, deep undercut of abutment, not posterior of abutment

Periodontitis of abutment, esthetic for posterior tooth, not posterior of abutment

Large edentulous space, not posterior of abutment, periodontitis of abutment

Deep undercut of abutment, periodontitis of abutment, not posterior of abutment

. An ideal design framework of RPD should be:

Determine the path of insertion

As guiding planes

Locate retention areas

Locate the height of contour

All are correct

An ideal design a major connector should possess the following qualities:

Unification

Stress distribution

Cross Arch stabilization

Rigidity

All are correct

. The diagnosis of master cast of RPD be for design framework should be:

Determine path of insertion

Determine high of contour

Determine parallelism of abutments

Determine guiding planes

All are correct

. The goal of extension of RPD framework should be:

Stability framework

Function, Occlusion

Tissues adaptation

All are correct

The function of the guide plate is to:

Help establish a definitive path of insertion/ dislodgement

Stabilize the RPD by controlling its horizontal position

All are correct

What would be the best denture base connectors when there is limited inter occlusal space (<3mm):

Open lattice type

Mesh type

All metal base

All plastic base

All of the following clasps are infrabulge clasps except ?:

Ibar

Modified T bar

Roach clasp

Akers clasp

. Which of the following clasps commonly utilize lingual undercut ?:

Ring clasp , I bar clasp

Extended arm clasp, Akers clasps

Half and half clasp, Back action clasp

Half and half clasp, Ring clasp

A cingulum rest should be placed:

Between the occlusal and middle thirds of the incisors teeth

Above the middle third of the incisor teeth

On the disto incisal edges of the incisor teeth

At the junction of the gingival and middle thirds of the incisor teeth

An area undercut may preclude the selection of :

A suprabulge clasp

An infrabulge clasp

A Half and half clasp

A combination clasp

A removable partial denture may be:

All tooth supported

Tooth and tissue supported

All tooth supported and tissue supported

All tissue supported

Following condition(s) is/are also called as distal extension partial denture:

Kennedy’s class IV

Applegate class VI

Kennedy’s class I

Applegate class V

Floor of the rest seat should be:

Convex

Concave

Flat

Spoon shaped

Following structure of RPD gives both occlusal support and horizontal stabilization:

Occlusal rest

Interproximal occlusal rest

Internal occlusal rest

Indirect retainer

Removable partial denture movements away from tissue may occur due to following except:

Pull of food

Moving border tissues

Gravity

Mastication

Parts that offer support for removable partial denture are following:

Rest and reciprocal arm

Rest and retentive arm

Rest and denture base

Rest and minor connector

. Denture bases of removable partial denture offer:

Primary retention

Mechanical retention

Primary and mechanical retention

Secondary retention

In distal extension denture base, when there is no modification area exists on opposite side of the arch a………clasp is suitable at that side:

Ring clasp

Back action clasp

Reverse circumferential clasp

Embrasure clasp

Multiple clasps are joined at :

Tip of retentive terminals

Tip of reciprocal terminals

Back of occlusal rests

Back of the minor connector

Following parts of a removable partial denture may act as indirect retainer, except:

Rests

Proximal plates

Minor connector supporting rests

Retentive tip

When designing palatal major connectors ,relief should for:

Palatal torus

Ridge area

Elevated mid suture line

Pugae areas

Labial bar is indicated when:

There is a diastema

There is labial inclination of teeth

There is linqual inclination of teeth

There are periodontally weak teeth

The superior border of linqual bar should be:

Deep in the linqual sulcus

At least 4 mm below the gingival margin

At the cingulum of anterior teeth

At least 7 mm below the gingival margin

What are the functions of an indirect retainer:

to prevent horizontal dislodgement of the distal extension bases of removable partial denture.

to connect the parts of the prosthesis located on one side of the arch with those on the opposite side

to prevent vertical dislodgement of the distal extension base of removable partial denture.

to link the major connector and other parts of the prosthesis together

In the mesial rest, guide plane and i-bar design, reciprocation is achieved by:

flexible plating

major connectors

Retentive clasp arm

All of the following are advantages of the gingivally approaching clasps as compared to occlusally approaching clasps, except:

less tooth contact

less distortion of coronal contours

less bothersome to vestibular tissues

Esthetically superior in most cases

. Stability is mainly against:

horizontal forces

functional forces

horizontal forces and functional forces

forces against removal of prosthesis

An undercut in relation to tooth lies:

below the survey line

above the survey line also

below the survey line and above the survey line also

on occlusal surface

Guiding plane are:

usually single

usually multiple

usually parallel

usually multiple and usually parallel

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