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تحميل الدليل التدريبي

أسئلة شائعة




·                     Support is best obtained in a distal extension of a mandibular removable partial denture from: 

a)            mandibular lingual plate

b)            buccal flange area 

c)            retromolar pad

d)            mandibular ridge


·                     The most important structural consideration of an occlusal rest is: 

a)            depth

b)            width

c)            length

d)            contour 


·                     The superior border of the lingual bar should be located away from the free gingival margin by: 

a)            2 mm

b)            3 mm

c)            4 mm

d)            1 mm


·                     In a Class I removable partial denture, which of the following are the indications for a lingual plate? 

a)            loose anterior teeth

b)            high frenum attachments

c)            extreme vertical resorption of residual ridges allow a little horizontal support

d)            inadequate space between free marginal gingival and sulcus for a lingual bar

e)            all of the above 


·                      What are the advantages of the altered cast technique? 

a)            more accurate border development

b)            accurate anatomical impression of ridge area

c)            allows development of a functional type of impression

d)            allows a selective tissue placement of impression for more ideal distribution of the load on the distal extension ridge area


·                     A Class I R.P.D. with a cast circumferential clasp, a distocclusal rest, a mesiobuccal undercut and a lingual reciprocal arm.  What is the effect on the posterior 

a)            Class I lever

b)            Class II lever

c)            Class III lever

d)            Cantilever 

·                     What major connector would be indicated in the maxillary arch with the severe vertical ridge resorption, six remaining anterior teeth with Class I mobility, and end-to-end occlusion? 

a)            palatal strap

b)            anterior-posterior palatal bars

c)            U-shaped connector

d)            full palatal coverage with lingual plate


·                    The choice of major connector is made: 

a)            before definitive treatment commences

b)            from the Law of Averages

c)            In laboratory phase

d)            arbitrarily by the laboratory


·                     When you have a Kennedy Class II, Modification I Removable Partial Denture, you don’t need an indirect retainer when you have: 

a)            firm, dense ridge

b)            modification space opposite side of arch to saddle area

c)            adequate lingual bar for broad stress distribution

d)            don’t need indirect retention in this situation


·                     What is considered an acceptable zone of attached epithelia on the buccal of a mandibular premolar for use as a partial denture abutment? 

a)            1-2 mm

b)            2-3 mm

c)            3-4 mm

d)            an amount sufficient to deter frenum pull


·                     A mandibular Kennedy Class I partial denture with cast circumferential retentive clamp arms, cast reciprocal clasp arm, distal occlusal rests and lingual plate has loosening of the abutment teeth.  What would be the logical cause: 

a)            lingual plate

b)            cast circumferential retentive clasp

c)            cast reciprocal clasp

d)            distal occlusal rest 


·                    Which are purposes of a surveyor? 

a)            determine the path of insertion

b)            establish tooth undercut

c)            determine tissue undercuts

d)            tripoding

e)            all of the above


·                     During a periodontic recall examination, it was noticed that finger pressure on the molar area in a Class I R.P.D. caused the indirect retainer to raise above the rest seat.  What would be the most appropriate procedure to correct this situation?

a)            rebase denture

b)            reline denture

c)            remake denture


·                    The W.W. clasp is used when:

a)            a very deep undercut is present

b)            high survey line is present

c)            stress breaker is needed

d)            all of the above are correct


·                     In case of retroclined lower anterior teeth the best major connector to use is:

a)            lingual bar

b)            open kennedy

c)            swing lock

d)            labial bar


·                     The most suitable type of major connector in case of RPD where only the maxillary anterior remain is:

a)            anterior posterior palatal strap

b)            single broad palatal strap

c)            complete palatal coverage

d)            U-shaped palatal major connector


·                   The flexibility of the clasp arm depend mainly on:

a)            Location of the undercut

b)            degree of undercut

c)            the cross sectional form

d)            All of the above


·                     Rest may be place upon:

a)            sound enamel

b)            cast restoration

c)            silver amalgam alloy restorations

d)            any of the above


·                     Metal framework do not fit master cast due to:

a)            mold cooled improperly

b)            incorrect water-powder ratio used for investment cast

c)            reversible hydrocolloid duplicating material used too long

d)            All of the above are correct


·                    Relief cannot be used in the edentulous area when:

a)            the denture base is going to be all metal

b)            edentulous area with recently extracted teeth

c)            free and saddle

d)            None of the above


Answer with true (T) or false (F)

·                     A bar clasp arm should be used on a terminal abutment if the undercut lies on the side of the tooth away from the extension base. 

·                     A rest should be designed so that the transmitted forces are directed along the long axis of the supporting tooth as nearly as possible. 

·                     An imaginary line around which a removable partial denture tends to rotate is known as a fulcrum line. 

·                     The dentist alone should be responsible for the choice of design used, and the design should be based on both biological and mechanical principles. 

·                     A U-shaped palatal major connector should be used only when inoperable tori extend to the posterior limit of the hard palate. 

·                     A minor connector contacting the axial surface of an abutment should not be located on a convex surface but instead should be located in an embrasure in which it will be the least noticeable to the tongue.


Fill in the proper answer: 

·                     The objectives of a removable partial denture can be summarized as follows: 

1.            Support

2.            Stabiity

3.            Retention

4.            Resorption

5.            Passivity 


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