RPD Review Questions

Questions 51-60


Question #51

 

The C + 1 rule

Does not apply to class IV RPDs

Does not apply to class III RPDs

Gives a general rule for the number of clasps

Both 1 and 3

 


Question #52

Which of the following maxillary major connectors possesses the least strength and rigidity?

Anterior-posterior palatal strap

Horse-shoe

Palatal plate

Modified palatal plate

 


Question #53

True or False

A cingulum rest is normallly placed between the middle and incisal thirds of the maxillary incisors in order to avoid occlusal interferences.

True

False

 


Question #54

Your patient exhibits the mandibular class II modification 1 arch shown to the right. Tooth #30 is tilted mesiolingually, but has a very severe tissue undercut on the lingual. What is the best clasp for this situation?

Cast circumferential clasp utilizing a distolingual undercut.

Cast I-bar utilizing a mesiolingual undercut.

Cast ring clasp utilizing a mesiolingual undercut.

Wrought wire circumferential clasp utilizing a distolingual undercut.

 


Question #55

True or False

All methods of measuring the vertical dimension of occlusion agree on one major principle: In physiologic functions (speaking and swallowing) the teeth should make contact.

True

False

 


Question #56

True or False

Malposed or super-erupted teeth may cause a discrepancy between centric relation and centric occlusion. Therefore, it is recommended that the opposing teeth not touch during the making of a centric relation record for mounting of diagnostic casts.

True

False

 


Question #57

True or False

The purpose of the centric relation record is to record the exact position of the maxilla to the mandible in a protrusive relation.

True

False

 


Question #58

True or False

If abutment teeth require crowns, the RPD design is prepared after the crowns are cemented.

True

False

 


Question #59

True or False

Alginate impression materials have excellent dimensional stability over time and seldom lead to over extended vestibular extensions.

True

False

 


Question #60

True or False

Master casts for patients with lone-standing abutments should be poured in "Silky Rock" stone.

True

False

 


On to Questions 61 through 70