MCQs in Prosthodontics - Major and Minor Connectors - Removable Partial Dentures

# Which of the following is not a mandibular major connector?
A. Lingual plate
B. Lingual bar
C. Lingual arch
D. Labial bar

# The function of minor connector is:
A. Connects major connector to all the components of RPD
B. Prevents gingival displacement of the RPD
C. Allows a single path of placement of the RPD
D. It is that unit of RPD to which all other parts are directly or indirectly attached

# The most rigid palatal major connector is:
A. A-P palatal bar
B. Palatal plate
C. Palatal bar
D. Horse shoe shaped palatal bar

# Advantage of U shaped palatal strap is increased:
A. Rigidity
B. Support
C. Stability
D. None of the above

# Tissue stops in impression tray aids in:
A. Anteroposterior stabilization
B. Better acrylic flow
C. Proper retention
D. All of the above

# Major connectors of a maxillary RPD may be beaded to:
A. Produce a stronger framework
B. Aid in retention of removable partial denture
C. Hold acrylic resin to the metal
D. Produce positive contact with the tissue

# Function of major connector is that it:
A. connects parts of prosthesis on one side of arch with those on the opposite side
B. Distributes forces over entire supporting structure
C. Resists flexing and torque
D. All of the above

# Lingual bar is used in conditions where:
A. Lingual sulcus is deep
B. Lingual sulcus is shallow
C. When splinting of adjacent teeth is required
D. When abutment teeth have poor bony support

# Most common complaint of the patient with a thick palatal bar in a RPD is:
A. Distortion under occlusal stress
B. Poor dissipation of force due to rigidity
C. Difficulty in pressing the food backward and swallowing
D. Loss of taste sensation

# Posterior palatal bar is placed:
A. On the soft tissue
B. Placed on the hard palate entirely
C. At the junction of the hard and soft palate
D. Should be kept 0.5-1.0 mm away from the mucosa

# Advantage of wide palatal bar over narrow bar is:
A. Less discomfort
B. Less bulk
C. More tough
D. More tissue coverage (area of basal seat)

# The advantage of using a metal denture base is:
A. Increase in tissue tolerance
B. Easy laboratory procedure
C. Rebasing and relining are quite easy
D. Increase in restorative cost

# Advantage of palatal strap:
A. Increased rigidity with less bulk
B. Increased retention of appliance
C. Can be used in Kennedy class I partial dentures
D. More economical and comfortable to the patient

# The advantages of using a metal deture base are:
A. Increased rigidity with less bulk
B. reduction of bulk in the palate
C. better stimulation of the underlying tissue
D. All of the above

# The design for a maxillary cast RPD framework with a double bar (anteriorly and posteriorly) type of major connector is indicated when:
A. Maximum palatal support is required
B. High vault type of palate
C. Acrylic plate for palate is to be used
D. where a single palatal bar connector would flex

# The lingual bar connector should be located at least how many millimeters below the gingival margin?
A. 2
B. 4
C. 6
D. 8

# Ideal denture base material should not have:
A. Sufficient strength
B. Dense and non irritating surface
C. high specific gravity
D. Esthetically acceptable

# For long span distal extension bases where rigidity is critical, the major connector of choice is:
A. Palatal Strap
B. Anteroposterior palatal bar
C. Closed horse shoe
D. Horse shoe

# Cross sectional form and dimension of lingual bar major connector is:
A. 4 gauge full pear shaped
B. 6 gauge half pear shaped
C. 6 gauge round shaped
D. 4 gauge flat

# Which one of the following should be relieved under a palatal major connector?
A. Rugae region
B. Posterior palatal seal
C. Soft flabby tissue
D. Torus palatinus

# Most important part of RPD is:
A. Base
B. Connector
C. Reciprocal arm
D. Replaced tooth

# Borders of major connectors adjacent to gingival crevices should be no closer to crevices than:
A. 1-2 mm
B. 2-3 mm
C. 3-6 mm
D. 7-10 mm

# Discoloration of a denture constructed from a cold cure acrylic resin is due to:
A. Absorption of oral fluids
B. pH changes in saliva
C. Leaching out of tertiary amines
D. Leaching out of excess monomer

# When a large inoperable palatal torus is present, then the major connector of choice is:
A. Palatal Strap
B. Antero-poeterior palatal strap
C. Antero-posterior palatal bar
D. Complete palatal plate

# Least preferred maxillary major connector is:
A. Single palatal strap
B. Anterior posterior bar
C. Horse shoe shaped major connector
D. Complete palatal coverage

# Compared to resin base, the main disadvantage of a metallic denture base in a distal extension situation is that, metal bases:
A. are difficult to keep clean
B. transfer thermal changes quickly to mucosa
C. cannot be relined in event of ridge resorption
D. are subjected to distortion and breakage

# Minor connector for the mandibular distal extension base should be:
A. Half the length of edentulous ridge
B. Two thirds the length of edentulous ridge
C. Full length of edentulous ridge
D. None of the above

# Mandibular major connector used in class I situation where residual ridges have undergone vertical resorption is:
A. Lingual bar
B. Lingual plate
C. Kennedy's bar
D. Labial bar

# Lingual plate is indicated when there is:
A. need for addition of one or more anterior teeth
B. deep lingual sulcus
C. good ridge support
D. narrow lingual sulcus

# Snow shoe effect indicates:
A. Broad coverage
B. Physiologic basing
C. Indirect retention
D. All of the above

# The minor connector leaves the major connector:
A. Gradually
B. Abruptly
C. Covering large area
D. Without any relief

# Lingual bar is:
A. Maxillary major connector
B. Direct retainer
C. Indirect retainer
D. None of the above
# Which of the following will happen with a flexible major connector ?
A. It will make other components more effective
B. Will cause PDL destruction of abutment tooth
C. cause ill-fitting of RPD
D. Will cause difficulty in occlusion

# The only one flexible minor connector is:
A. that connecting clasp assembly to major connector
B. that connecting indirect retainer assembly to the major connector
C. that joining the denture base to major connector
D. approach arm of a bar type clasp

# Lingual plating should be supported:
A. by the inclined surfaces of the mandibular incisors
B. with bracing arms
C. with the rests
D. with minor connector

# Passive retention in removable partial dentures is provided by:
A. Direct retainers
B. Indirect retainers
C. Undercuts
D. Guiding planes

# If future replacement of questionable mandibular teeth is anticipated, the major connector of choice is:
A. Lingual bar
B. Sublingual bar
C. Lingual plate
D. Cingulum bar

# The junction of mandibular minor connector with major connector is:
A. Butt type joint
B. Acrylic forms the joint
C. Ball and socket joint
D. There is no joint

# Major connector should be:
A. able to act as indirect retainer
B. able to function as direct retainer
C. rigid to connect bilateral components
D. able to function as stress breakers

# Relief under a maxillary major connector:
A. is generally not required
B. is required
C. may be used
D. may not be used

# Lingual plate is indicated in all except:
A. Periodontally weakened tooth
B. Anterior ridge resorption
C. High lingual frenum
D. Vestibule of more than 8 mm

# Maximum coverage to distribute forces over a wide area:
A. Snow-shoe effect
B. Bezold-Brucke effect
C. Realeff effect
D. Spectral curve

# A minor connector contacting the axial surface of an abutment should not be located on a:
A. Flat surface
B. Concavo-convex surface
C. Convex surface
D. Concave surface

# The sublingual bar can be used for mandibular RPD where the height of the floor of the mouth in relation to the free gingival margin will be:
A. less than 6 mm
B. greater than 6 mm
C. less than 8 mm
D. more than 8 mm

# Lingual split bar type connector is not preferred in partial denture because of: (Two Answers correct)
A. Decreased retention
B. Complex design
C. Entrapment of tissue
D. Inadequate stability

# Which of the following is not a major maxillary metal partial denture framework?
A. Lingual U plate
B. Palatal strap
C. Palatal plate
D. Single palatal plate

# The superior border of lingual bar should lie:
A. Deep in the lingual sulcus
B. At least 4 mm below the gingival margin
C. At the cingulum of anterior teeth
D. At least 7 mm below the gingival margin

# Which part of the distal extension removable partial denture provides the greatest resistance to movement and torquing of the abutment tooth?
A. Rest
B. Base
C. Retentive clasp
D. Minor connector

# Distance between maxillary major connector and tooth tissue junction is:
A. 2 mm
B. 4 mm
C. 6 mm
D. 8 mm

# Minor connector may be:
A. of lattice work construction
B. of mesh construction
C. Bead or nail head construction
D. All of the above

# Kennedy bar is also known as:
A. Double lingual bar
B. Lingual plate
C. Lingual bar
D. Palatal plate