RPD Review Questions

Questions 111-120


Question 111

Select a maxillary major connector for the large Class III modification 1 RPD shown to the right. The residual ridges are of medium quality but the third molar abutment teeth are weak.

A wide single palatal strap

An anterior-posterior palatal strap

A modified palatal plate

A horse-shoe

 


Question 112

Select a maxillary major connector for the Class III modification 1 RPD shown to the right. The residual ridges are of good quality and the first premolar and second molar abutment teeth are strong.

Anterior-posterior palatal strap

Horse-shoe

Modified palatal plate

Palatal strap

 


Question 113

Select a maxillary major connector for the Class III modification 1 arch shown to the right. The residual ridges are of good quality and the first premolar and third molar abutment teeth are strong. The patient relates a long history of gagging problems and, in fact, had major problems with the impressions for the study casts.

Anterior-posterior palatal strap

Horse-shoe

Modified palatal palte

Palatal strap

 


Question 114

Your patient has the partially edentulous arch shown in the left illustration. Tooth #28 has the survey line and undercut shown in the right drawing. An infrabulge clasp CAN NOT be used due to a very high frenal attachment immediately below the abutment. What would be your first choice for the clasp on tooth #28?

A cast circumferential clasp

A wrought wire circumferential clasp

A cast circumferential embrasure clasp

A wrought wire circumferential embrasure clasp

 


Question 115

If a mandibular RPD abutment must be crowned, the FPD impression should include

all the abutment teeth for the RPD

a full arch impression

the retromolar pads

all of the above

 


Question 116

A tissue undercut may preclude the selection of

A suprabulge clasp

An infrabulge clasp

A half and half clasp

A combination clasp

 


Question 117

A combination clasp assembly generally has

a cast bracing arm

a distal rest

a wrought wire retentive arm

all of the above

 


Question 118

Your patient's partially edentulous mandibular arch form is shown to the right. Which of the abutment teeth would be likely to have a combination clasp?

Not likely on any of the abutments

#20 very likely; #29 less likely

#29 very likely; #20 less likely

#31 very likely; not likely on either #20 or #29

 


Question 119

A modified T-bar on a terminal abutment for a Class I partially edentulous arch (such as the one shown)

is used with a distal rest

is placed into a distobuccal undercut

should have the vertical approach arm distal to the greatest mesio-distal curvature of the facial surface

both 1 and 2

 


Question 120

Which of the following should be considered in diagnosis for an RPD patient?

interarch space

tissue undercuts

occlusal contacts

all of the above

 


On to Questions 121 through 130