MCQs on Removable Partial Dentures : Introduction and Classification

# Class IV Kennedy classification is:
A. Bilateral edentulous area located posterior to the remaining natural teeth
B. Unilateral edentulous area located posterior to the remaining natural teeth
C. Unilateral edentulous area with natural teeth remaining both anterior and posterior to it
D. A single but bilateral (crossing the midline) edentulous area located anterior to the remaining natural teeth

# A distal extension partial denture receives its support :
A. From terminal abutments
B. Equally from abutments and the residual ridges
C. Mostly from residual ridge
D. Exclusively from residual ridge

# The support for a removable partial denture is usually :
A. Tooth support
B. Mucosa support
C. Occlusal rest support
D. Tooth and mucosa support

# The mandibular distal extension RPD extends upto:
A. Full length of retromolar pad
B. Anterior one third length of retromolar pad
C. Anterior 2/3rd of Retromolar pad
D. None of the above

# Distal extension RPD is:
A. Both tissue and tooth borne
B. Tooth borne
C. class III condition
D. class IV condition

# Bilateral edentulous area present posterior to the remaining teeth can be classified as Kennedy's:
A. Class I
B. Class II
C. Class III
D. Class IV

# The Kennedy classification that is more suitable for an internal attachment is:
A. Class I
B. Class II
C. Class III
D. Class IV

# If a third molar is absent and not to be replaced:
A. It is not considered in the classification of partial dentures
B. It may or may not be considered
C. It is considered important for classification
D. None applies

# The most widely used partial denture classification is:
A. Kennedy
B. Kennedy-Applegate
C. Cumberland
D. None of the above

# RPD is indicated in all EXCEPT:
A. Long edentulous span
B. Multiple edentulous spaces
C. Excessive loss of alveolar bone
D. Distal abutment loss

# The main advantage of RPD over FPD in replacing bilateral lower teeth is:
A. Cross arch stabilization
B. Aesthetics
C. Less expensive
D. Comfort to the patient

# The purpose of Treatment removable partial denture:
A. for convenience until a more definitive denture is rendered
B. to condition the soft tissues that have been abused by ill fitting prosthesis
C. aiding the patient in making transition to a complete denture
D. to condition the patient to wear a removable restoration

# Looseness seen in a recently delivered RPD is due to:
A. Deflective occlusal balancing
B. Passive clasp on abutment
C. Thin flange
D. Insufficient overlap of posterior teeth
# The most important cause of failure of patient to wear RPD is due to:
A. Indifferent patient education
B. Faulty laboratory procedures
C. Poor framework design
D. Improper preliminary rehabilitative restorative procedures

# Most important property of a RPD is:
A. Retention
B. Stability
C. Occlusion
D. Prevention of tooth migration

# On examining the edentulous mouth of an aged patient wearing complete maxillary denture against six mandibular teeth, the dentist will see:
A. Cystic degeneration of the foramina of the anterior palatine nerve
B. Loss of osseous structure in the anterior maxilla
C. Flabby tissue in the posterior region
D. Decreased interocclusal distance

# 3 weeks after insertion of distal extension partial denture, the patient reports to the dental clinic with complaint of sensitivity to chewing pressure. The most probable reason would be:
A. Improper Occlusion
B. Abrasion of tooth by clasp
C. Wearing off the cement base
D. Passive retentive arm

# A patient comes with all the lower premolars and first molar removed, should the second molars be removed? Why?
A. Yes, it will help in taking support from the ridge
B. No, 2nd molar will help in determining the vertical dimension
C. No, because for designing RPD, sound posterior tooth with good bony support shouldn't be extracted
D. Yes, it will help in extending the denture to retromolar pad to have a good retention

# Main cause of failure of partial denture results from:
A. Caries of the abutment
B. Resorption of the ridge
C. Interference with the function of the tongue
D. Fracture of metal framework

# The primary areas of support for the lower RPD are:
A. Crest of the ridge
B. Buccal shelf region
C. Lingual slopes of the residual ridge
D. Both B and C

# Factors influencing the support of a distal extension denture base by the residual ridge is :
A. Quality of the residual ridge
B. Type and accuracy of the impression registration
C. Occlusal load applied
D. All of the above

# The true statement regarding support of the distal extension denture base is:
A. It gains its suppport through the abutment and residual ridges
B. Tissues covering the residual ridges are 7-10 times more displaceable than the periodontal ligaments of abutment teeth
C. Support from the residual ridge becomes greater as the distance from the terminal abutment increases
D. All of the above

# Horizontal rotational tendency is seen in a mandibular class I RPD to the patients left is resisted by the denture bases by:
A. The lingual slope of the left alveolar ridge and the buccal slope of the right alveolar ridge
B. The lingual slope of the right alveolar ridge and buccal slope of the left alveolar ridge
C. By the lingual slope of the right and left alveolar ridge
D. By the buccal slope of the left and right alveolar ridge

# For obtaining functional impression for RPD:
A. Teeth are recorded in anatomical form and ridge in functional form
B. Teeth are recorded in functional form and ridge in anatomical form
C. Teeth and ridge are recorded both in anatomical and functional form
D. None of the above

# In a cast partial denture wearer, the stresses transferrred to the abutment teeth are decreased if:
A. Retentive arm of the clasp is less flexible
B. Edentulous span is long
C. Length of the clasp is increased
D. Clasp is active when placed on abutment teeth

# Functional impression of class I partial edentulous arches may be made by:
A. Hindel method
B. Fluid wax impression method
C. Reline method
D. All of the above

# RPD impression for a Kennedy class I and II case differ from the full denture impression in that:
A. It is a mucostatic impression
B. It should be a functional impression
C. All of the above
D. None of the above

# Holes placed in an individualized impression tray in the median palatal raphe area, incisive papilla area and other palatal areas serve the purpose of :
A. Placing uniform pressure on the palatal tissues by the impression material
B. Allows the escape of excess impression material thereby recording the palatal tissues in an anatomical form
C. Has no effect on the resultant quality of the impression
D. Causes the entrapment of air in the impression surface

# Perforated trays are used with:
A. Alginate impression material
B. Silicone impression material
C. Modeling compound
D. Impression waxes

# Which of the following statement is true reagrding hydrocolloids ?
A. Agar sets by physical change and the reaction is reversible
B. Alginate sets by chemical change and the change is irreversible
C. Entrapment of air is more with alginate than with agar impression
D. All of the above

# Casts should be poured immediately into hydrocolloid impressions because:
A. When exposed to air, they rapidly lose water content with resultant shrinkage
B. Cast material will flow more readily when being poured
C. Both of the above
D. None of the above

# When a hydrocolloid impression exhibits syneresis, it can be expected that:
A. exudate has accelerating effect on the setting reaction of the gypsum
B. exudate has retarding effect on the setting reaction of gypsum
C. results in chalky cast surface
D. Both B and C

# A mucostatic impression for a prosthesis is taken for which of the following cases ?
A. Lower RPD with Kennedy class I classification
B. Lower RPD with Kennedy class II classification
C. Upper RPD with Kennedy class IV classification
D. Full upper and Lower denture

# Which type of RPD can best resist the forces, to which it is subjected ?
A. Class I
B. Class II
C. Class III
D. Class IV

# To prevent dislodgement of abutment in distal extension RPD, it is required to have a :
A. Positive denture base - tissue relationship
B. Stress breaker
C. Indirect retainer
D. Multiple clasping

# Modification spaces are:
A. Spaces other than the original class
B. Spaces posterior to all teeth
C. Spaces anterior to all teeth
D. Additional space in class IV

# According to the Kennedy's classification, the posterior unilateral edentulous space is:
A. Class I situation
B. Class II situation
C. Class III situation
D. Class IV situation

# The lever action that occurs in distal extension partial dentures is:
A. First order lever
B. Second order lever
C. Third order lever
D. fourth order lever

# When designing a RPD for Kennedy class II arch, the clasp configuration usually employed is:
A. Unilateral
B. Tripod
C. Bilateral
D. Quadrilateral

# In mandibular class II with Kennedy modification I with opposing maxillary dentition, which occlusionn is preferred ?
A. Group occlusion
B. Canine guided occlusion
C. Balanced occlusion
D. Either canine guided or group occlusion depending upon number of missing teeth

# In Kennedy's classification, the least common arch is:
A. Class I
B. Class II
C. Class III
D. Class IV

# Unilateral edentulous area with natural teeth both anterior and posterior to it represent Kennedy's ________ arch.
A. Class I
B. Class II
C. Class III
D. Class IV

# Classification of partially edentulous arches:
A. Should be universally accepted
B. Should serve as a guide to the type of design to be used
C. Should permit differentiation between tooth supported and tooth and tissue supported partial denture
D. All of the above