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DM Theory > Week 1 > Flashcards

Week 1 Flashcards

1
Q

In the late 1700’s what were invented

A

Porcelain teeth

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2
Q

In 1874 this was introduced as a means of preventative dentistry

A

Fluoridation

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3
Q

In 1901 who is credited with noting dental fluorosis in Colorado Springs

A

Dederick McKay

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4
Q

When was the first community water fluoridation program introduced

A

1945

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5
Q

The study of dental materials is the science covering the (6)

A

Evolution
Development
Properties
Manipulation
Care and evaluation
Of dental materials

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6
Q

What are the characteristic of dental materials (4)

A

-biocompatible
-bond permanently to tooth structure
-esthetically pleasing
-useful in repairing and regenerating missing tissues

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7
Q

Evidence based dentistry helps the clinician make decisions about

A

What is relevant to incorporate into practice

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8
Q

Developing an evidence based approach to addressing client concerns will

A

Increase the potential for successful client care outcomes by understanding the cause and effect relationship between biomaterials

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9
Q

There are 3 classifications of medical/dental devices grouped according to the amount of control needed to ensure their safety and efficacy

A

Class I: lowest risk; ex. Gloves, prophy paste, OTC PRODUCTS

Class II: products required to meet performance standards set by FDA or ADA. EX. Amalgam, composite

Class III: most regulated devices which sustain or support human life- require FDA approval. Ex. Bone grafting material, implants

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10
Q

Impression materials are used to make

A

Replicas of teeth restorations and preparations made for restorative treatments

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11
Q

An impression is a _____ reproduction of the oral structure

A

Negative

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12
Q

Diagnostic cast (study models) refers to

A

Positive replica of the teeth and surrounding oral tissue

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13
Q

Die refers to

A

The replica of a tooth that had been prepared for a restoration

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14
Q

3 types of impressions

A

Preliminary impressions
Final impressions
Bite registration

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15
Q

What are the 2 types of impression materials

A

Elastic materials (hydrocolloids, polyvinyl siloxane, polyether)

Inelastic materials (older impression materials rarely used; wax impression plaster, zinc oxide eugenol)

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16
Q

What are hydrocolloids

A

Water based colloids that function as elastic impression materials

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17
Q

2 types of hydrocolloids

A

Reversible
Irreversible

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18
Q

Sol refers to

A

Liquid state in which colloid particles are suspended

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19
Q

Gel refers to

A

Semisolid state in which colloid particles form a framework that traps liquid

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20
Q

Agar is what kind of hydrocolloid material? What is its composition?

A

Reversible
80% water, 8-15% agar

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21
Q

What is the most widely used impression material

A

Alginate hydrocolloid

22
Q

Alginate hydrocolloid changes from

A

Sol phase to a gel phase via chemical reaction and it cannot be reversed

23
Q

Alginate hydrocolloid is not accurate enough for final impressions, why?

A

Does not capture fine detail
Does not flow well into embrasures or occlusal surfaces

24
Q

Alginate is

A

Elastic irreversible impression material made from seaweed

25
Q

Advantages of irreversible hydrocolloid

A

Good for Subgingival impression
Working in a “wet” environment
Pouring models

26
Q

Disadvantages of irreversible hydrocolloids

A

Shrinkage (syneresis)
Swelling (imbibition)
Poor tear strength
Client care- burning “tissues”

27
Q

Using incorrect tray size when taking an impression will result

A

In an unacceptable impression

28
Q

What may be used to extend the tray

A

Utility wax

29
Q

Custom trays allow for

A

A more comfortable fit allowing for more accurate impressions

30
Q

Triple trays allow clinician to take an impression of

A

Max mand and bite reg at the same time

31
Q

Elastomeric materials are used (2)

A

-Where teeth are present and material flexibility is needed for removal from the oral cavity or teeth
- for impressions of preparations and for demanding highly accurate reproductions

32
Q

Elastomeric materials have qualities similar to?
Composed of ?
Do they have different viscosities?

A

Have qualities similar to rubber
Composed of a base and an accelerator
Have different viscosities (putty, heavy, light bodied)

33
Q

What is polysulfide

A

Oldest of the elastomers known as mercaptan rubber or rubber base

34
Q

Polysulfide has an unpleasant

A

Taste, odor and stains clothing

35
Q

Silicone material is available as

A

Additional reaction and condensation reaction

36
Q

What should not be mixed with latex gloves on

A

Silicone putty

37
Q

What is added to condensation silicone as a filler to keep the silicone paste from being runny and to provide stiffness

A

Silica or copper carbonate

38
Q

What is the stiffest of all elastomers

A

Polyether

39
Q

Most common method of displacing the gingival tissue away from the tooth prep to create space for impression material

A

Gingival retraction cord

40
Q

Bleeding when using a retraction cord can be controlled by using (3)

A

LA with epinephrine
Astringent
Coagulation with laser or electrocautery

41
Q

Advantages of digital impressions

A

No need for impression trays or materials
Images can be magnified, reviewed and retaken
More accurate

42
Q

Disadvantages of digital impressions

A

Cost
Training/practice
Lab fees
Size of scanner

43
Q

What does chroma refer to

A

Intensity or strength of the colour
*teeth are generally pale in colour

44
Q

Value refers to

A

How light or dark the colour is; teeth have value ranges in light scale; they are determined by the way they reflect light

45
Q

What does metamerism refer to

A

Colours look different under different light source

46
Q

Bridge: what does retainer refer to

A

Part of bridge that fits over abutment

47
Q

What is a Pontic

A

False or artificial tooth

48
Q

What is abutment

A

Supporting natural tooth

49
Q

Does an inlay involve cusp tips

A

No

50
Q

What cavitron tip is the latest addition to the cavitron inserts designed for plaque and calculus removal around titanium implants and abutments

A

Cavitron softip ultrasonic implant insert

51
Q

The cavitron softip implant insert is only used with a

A

Softip disposable prophy tip attached (single use item)

DM Theory (4 decks)

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