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Flashcards in Part 1 Deck (45):
1

Redness and soreness, limited to the crest of the edentulous ridge supporting a removable partial denture, are indicative of a____.

Centric prematurity

2

In order to achieve optimum casting results in the metal ceramic technique, it is necessary to use a

Phosphate bonded investment

3

In selecting anterior teeth for complete denture patients, one considers the patient's:

Facial size, shape and form
Age
Sex
Physical features

4

free way space is synonymous with

Interocclusal distance

5

Effects of cooling the mixing slab prior to cementation include:

Increasing the amt of powder that can be incorporated into the mix.
Increasing the setting time in the mouth.

6

Dental plaster powder differs from dental stone powder primarily in:

Physical nature of the particle

7

After extractions and healing, the maxillary denture bearing area discloses bony undercuts in both tuberosity areas.
Usually, the best tx for this condition is to:

Surgically reduce the undercuts just enough to allow a path of insertion.

8

To locate a hinge axis on a patient, one should use

a kinematic face bow

9

The greatest cause of porosity in a porcelain jacket crown is

inadequate condensation of the porcelain

10

To impart a softening heat treatment to a dental gold alloy, the best method would be

Quench the hot casting in cold water.

11

A patient complains of pain when brushing a tooth which has a complete veneer cast gold crown.
The most probable cause of this pain is

Occlusal interference in centric and working relations

12

The cast wrough combination clasp is desirable

because of its ability to flex in all directions

13

This procedure must be executed in order to obtain the most accurate possible casts from alginate impression

Pour the impression immediately

14

The MB cusp of mandibular left 1st molar is in deflective occlusal contact in centric occlusion but not in lateral excursions.
What might be spot ground to effect a balanced occlusion?

Marginal ridges of maxillary first molar and second premolar

15

Selective grinding is a procedure used routinely

for final correction of any existing occlusal disharmony in dentures

16

Elements contributing to a satisfactory bond between the casting and porcelain in the metal ceramic technique are

Fe, Sn, Au

17

An advantage of a wide, thin palatal bar as compared with a narrow bar is that the wide bar

can be adequately rigid with less apparent bulk

18

As compared with gold alloys, cobalt chromium casting alloys

melt at a higher temperature

19

The physiologic rest position has practical significance during the evaluation if maxillomandibular relations, especially as related to

vertical dimension

20

The dentist can best control the setting time of an irreversible hydrocolloid by altering the

temperature of the water

21

Abutment teeth for RPD should be contoured so that the retentive clasp tips can be placed

on the gingival third of the crown

22

The shape and amount of the DB extension of a complete mandibular edentulous impression is determined during border molding by the

position and action of the masseter muscle

23

The most important consideration in checking custom trays for accurate muscle molding is

stability and lack of displacement

24

When a px weearing CD makes a whistling sound while enunciating the S sound, it is caused by

the anterior teeth being placed too far labially

25

A broken stress or non rigid type fixed bridge is indicated when

retainers cannot be prepared to draw together without excessive tooth reduction

26

The Calcium sulfate type of investment for gold castings is not generally hearyed above 1300*F because

decomposition will cause corrosion of the gold

27

Splinting adjacemt abutment teeth in FPD is performed primarily to

improve distribution of the occlusal load

28

The greatest potential for wear exists between

porcelain and tooth

29

Failure of partial dentures due to poor clasp design can best be avoided by

altering tooth contours

30

The usual cause of contacting or clicking of posterior teeth when a px speak is

increased vertical dimension of occlusion

31

Repeated fracture of a porcelain fused to metal restoration is due primarily to

an inadequately designed framework

32

The type of load on teeth that is most destructive to the periodontium is the

Horizontal

33

In lateral movements, the non working condyle moves in which direction?

Down, forward, medially

34

The most likely tissue reaction to gross overextension of a CD that has been worn a long time is

Epulis Fissuratum

35

The relationship of a denture base to bone that resists dislodgement of the denture in a horizontal direction.

Stability

36

A px who wears CD is having trouble pronouncing the letter T.
This is probably caused by:

incorrect positioning of maxillary incisors

37

In RPD design, guiding planes serve to

assure predictable clasp retention

38

What is a vertical metal stop?

Indirect retainer

39

major connectors of a maxillary RPD may be beaded to

produce a positive contact with the tissue

40

Chroma is that aspect of color that indicates

degree of saturation of the hue

41

For the best results when using an elastomeric impression material, the prepared tooth should be

free of surface moisture

42

The DL extension of the mandibular impression for a CD is limited by the action of the

Superior constrictor muscle

43

Proper lip support for a px with CD is provided primarily by the

facial surfaces of teeth and simulated attached gingiva

44

In designing a retainer on a non carious mandibular first premolar abutment with a short clinical crown, a _____ restoration is most appropriate.

Full crown

45

When a RPD is completely seated, the retentive terminals of the retentive arms should be

passive and applying no pressure on the teeth