Prosth

Question 1

What property limits the number of times a base metal clasp arm can be adjusted?

Answer 1

elongation

Question 2

In a maxillary RPD, the minimum distance between the major connector and the FGM is?

Answer 2

6 mm

Question 3

in a mandibular RPD, the minimum distance between the major connector and the FGM is?

Answer 3

3 mm

Question 4

in a mandibular RPD, the minimum distance between the floor of the mouth and the FGM is?

Answer 4

6-8 mm

Question 5

Where should the retentive clasp arm tip engage the tooth?

Answer 5

in the undercut

Question 6

Where is the undercut commonly located on a tooth?

Answer 6

the junction of the middle and cervical third

Question 7

What is the function of flux in soldering?

Answer 7

essentially to clean the areas of the metal to be soldered/remove oxides/prevent oxidation so that the joint is strong and durable

Question 8

What is flexural strength?

Answer 8

the ability of a material to bend without fracturing

Question 9

Zinc oxide eugenol contains ___ which is ___ to the pulp and ____ the risk of pulpal irritation.

Answer 9

Eugenol, soothing, decreases

Question 10

Zinc phosphate cement contains ___ which is ___ to the pulp and ____ the risk of plural irritation.

Answer 10

phosphoric acid, irritating, increases

Question 11

The modulus of elasticity is ___ to the stiffness or rigidity.

Answer 11

directly proportional 
(more rigid = higher modulus of elasticity)

Question 12

Brittle materials have ___ tensile strength and ___ compressive strength.

Answer 12

Low, high

Question 13

Ductile materials have ___ tensile strength and ___ compressive strength.

Answer 13

High, low

Question 14

Base metal alloys have a ___ melting point compared to high noble alloys.

Answer 14

higher

Question 15

What is the Bennett angle?

Answer 15

Angle formed by the non-working condyle and the sagittal plane during lateral movements

Question 16

What is the Bennett shift?

Answer 16

The lateral movement of the mandible towards the working side during lateral excursion.

Question 17

What is the Bennett movement?

Answer 17

The right and left condylar motions caused by lateral movements of the mandible.

Question 18

Where should the most labial position of a maxillary central incisor denture tooth be placed relative to the incisive papilla?

Answer 18

8-10 mm anterior

Question 19

What is tensile strength?

Answer 19

the maximum stress a material can withstand while being stretched or pulled before failing

Question 20

What is elastic modulus?

Answer 20

the ability of a material to resist permanent deformation

Question 21

What is fracture toughness?

Answer 21

the ability of a material to resist crack propagation

Question 22

What should the dimensions of an occlusal rest be?

Answer 22

• 1/3 B-L width of tooth
• 1.5 mm deep
• incline apically towards center of tooth

Question 23

_____ release alcohol as a byproduct during the setting reaction.

Answer 23

Condensation silicones

Question 24

What parts of an RPD should be flexible?

Answer 24

clasps

Question 25

Define centric relation and the position of the condyles.

Answer 25

Condyles in the most anterior-superior position and disc interposed at its thinnest part

Question 26

What impression material has the highest tear strength?

Answer 26

Polysulfide

Question 27

Where should the thinnest portion of the wax pattern be placed in the ring?

Answer 27

the deepest part of the ring

Question 28

What is the casting shrinkage of cobalt chromium?

Answer 28

2.2%

Question 29

This is part of an artificial tooth that is only found on anterior porcelain teeth:

Answer 29

pin