Questions 141-150

RPD Review Questions

Questions 141-150

Question #141

When placing the tripod marks on the diagnostic cast, the vertical arm of the surveyor

should have the analyzing rod in place.

should be moved up or down to touch the tissues at widely separated areas.

Both 1 and 2 are true

Neither 1 nor 2 are true

Question 142

The internal and external finish lines are

normally superimposed over each other.

normally offset from each other to avoid weakness in the framework.

normally designed and placed independently.

none of the above statements are true.

Question 143

In general, lingual plating should be supported

by the inclined surfaces of the mandibular incisors.

with minor connectors.

with bracing arms.

with rests.

Question 144

A maxillary arch without three contiguous incisors (such as the one shown)

usually requires plating of the remaining incisor

should not be plated

should have a horse-shoe major connector

both 1 and 3 above.

Question 145

The external finish line on the distal extension side of the mandibular Class II modification 1 RPD for the partially edentulous arch shown to the right

runs from the lingual frenum to the retromolar pad.

runs from the lingual of the guide plate to the floor of the mouth.

runs from the mesial of the guide plate to the retromolar pad.

cannot be determined without more information.

Question 146

True or False

Wrought wire retentive arms are usually selected for distal extension RPDs when the tips of the arms lie behind the axis of rotation.

True

False

Question 147

Occlusal rest preparations should be

spoon shaped

at least 1/3 the buccolingual width of the occlusal surface

at least one millimeter deep

all of the above

Question 148

Guide plates for anterior teeth

should be kept to the labial for best esthetics.

should be kept to the lingual for best esthetics.

be thinned on the labial aspect.

both 2 and 3 above.

Question 149

An anterior-posterior palatal strap major connector is less rigid than a horse-shoe major connnector because it (the A-P strap) has less width.

The first statement is true but the reason is false.

The first statement is false and the reason is also a false statement.

The first statement is true and the reason is true.

The first statement is false but the reason is a true statement.

Question 150

Your patient has the partially edentulous arch form shown. All of the abutments have good bone support. On which one of the abutments would you likely utilize a WW clasp?

#22

#29

#32

None of the above.