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Dental Materials > Quiz #2-CavityClass, Bonds, n Stuff > Flashcards

Quiz #2-CavityClass, Bonds, n Stuff Flashcards

1
Q

Which Class??? All pit and fissure cavities on the occlusal surfaces of premolars and molars

A

Class I

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2
Q

Which Class??? Cavities on the occlusal 2/3 of the facial and lingual surfaces of molars

A

Class I

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3
Q

Which Class??? Cavities on the lingual surfaces of maxillary incisors

A

Class I

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4
Q

Which Class??? Cavities on the proximal surfaces

of premolars and molars

A

Class II

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5
Q

Which Class??? Cavities on the proximal surfaces of incisors and canines that do not involve the incisal angle

A

Class III

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6
Q

Which Class??? Cavities on the proximal surfaces of incisors and canines that involve the incisal angle

A

Class IV

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7
Q

Which Class??? Cavities on the gingival 1/3 of the facial and lingual surfaces of all teeth

A

Class V

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8
Q

Which Class??? Cavities on the incisal edge of anterior teeth or on the occlusal cusp heights of posterior teeth

A

Class VI

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9
Q

What substance forms the bond between the inorganic filler and the organic oligomer during setting?

A

Coupling Agent

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10
Q

What is the name of our coupling agent?

A

SiLanes

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11
Q

A coupling agent must form a bond between the inorganic _______ and the organic _______ during setting.

A

filler….oligomer

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12
Q

In a coupling agent reaction: The surface of the filler is treated with a coupling agent _______ mixing with the oligomer.

A

BEFORE

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13
Q

Coupling Agents: During the setting of the oligomer the double bonds of the silane react with the oligomer to form a _____ from the filler through the coupling agent to the oligomer to the _________.

A

LINK!!…polymer matrix

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14
Q

What is the most common photo initiator (most common photo-absorbing material)?

A

Camp-hor-quin-one

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15
Q

What color light does CampHorQuinOne absorb? What is the wavelength in nm?

A

BLUE! 460-470 nm

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16
Q

Unreacted double bonds may be as high as 75% at the ____ inhibited _______ layer.

A

AIR….SURFACE

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17
Q

Polymerization Shrinkage: Bond failure at the _______. This allows in flux of oral ______, marginal ______, secondary _______, and post op ________.

A

Interface…fluids, staining, caries, sensitivity

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18
Q

What is a DIRECT function of the volume fraction of polymer in the composite.

A

Polymerization Shrinkage

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19
Q

________ composite has a higher volume % of polymer = more shrinkage

A

Microfilled

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20
Q

________ composite has less polymer matrix and may be stiffer but has less shrinkage.

A

MicroHYBRID

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21
Q

Microfilled has more ______ present = more EXPANSION

A

POLYMER

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22
Q

What type of composite do you choose if you are concerned about ESTHETICS? What types of areas do you place this in?

A

MICROFILLED composite…NON stress bearing

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23
Q

What are the 4 major components of a composite material?

A

1.Organic Polymer Matrix 2. Inorganic filler particles 3.Coupling agent 4.Initiator-accelerator system

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24
Q

What are the three Oligomers (organic polymer matrices)?

A

1.Bis-GMA 2.U-DMA 3.TEG_DMA

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25
Q

In the coupling agent, which end attaches to the matrix? Which end attaches to the filler?

A

Matrix> C=C…Filler>the 3 methoxy groups

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26
Q

Wait, which layer has the inactivated C=C again? Like what % of them might be unreacted during the polymerization process?

A

haha the SURFACE layer lolzz…like totes 75% unreacted

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27
Q

________ composites have Elastic Modulus (stiffness) value of only 1⁄4 to 1⁄2 that of more highly filled ______ composites.

A

Microfilled…Fine particle

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28
Q

What is the layer of debris (organic and inorganic material) that forms onto the enamel and dentin when prepared with rotary instruments?

A

SMEAR layer

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29
Q

_______: strong acid solutions, also called conditioners.

A

Etchants

30
Q

Adhesives: Hydro______, dimethacrylate oligomers compatible with the _____ and __________ (Bis-GMA, TEG-DMA, U-DMA).

A

hydrophobic….primer… composite monomers

31
Q

Initiators and Accelerators: Light cured activator _________ and __________.

A

Camp-Hor-Quin-One….Organic Amine

32
Q

Filled Bonding Agents’s may have ______ bond strength.

A

HIGHER!

33
Q

What are two “other” ingredients in bonding materials that have AWESOME properties?

A

1.Flouride 2.Antimicrobials (Gluter-Aldehyde)

34
Q

Enamel bonding has ______ and ______ tags formed on etching with _______ acid gel.

A

Macro and micro…phosphoric acid

35
Q

BIG term he said a bunch: Enamel bonding: Microtags are more numerous and contribute most to __________ retention

A

MICRO-MECHANICAL

36
Q

In enamel bonding, what two substances flow into the irregular areas of the enamel and composite?

A

Primer and Adhesive (they form the macro and micro tags)

37
Q

What are the 3 procedures of DENTIN bonding? PLEASE DONT GET THIS WRONG :)

A

Etching, Priming, Bonding

38
Q

Interesting: Remember: dentin is almost ___% water making its surface strongly hydrophilic The goal is to produce _______ for micro-mechanical retention

A

25%….microtags

39
Q

What are the two substances removed during dentin etching?

A

the SMEAR layer and a small amount of HydroxyApatite

40
Q

**Care must be taken after etching to prevent ______ of the dentin surface to keep the ________ layer from collapsing on itself. SEAWEED analogy!

A

drying…. collagen sponge

41
Q

The process of impregnation of the etched dentin by the resin in the PRIMER is called: the __________ formation.

A

The hybrid layer formation

42
Q

What is this describing (tooth substance and attachment substance)? The hybrid layer may vary in thickness. If this zone is not fully impregnated with _______, a space may create a mechanically weak zone.. _______ have solvents to enhance wetting and carry the monomers into the tags. Several layers of the _______ may be needed to carry the monomers deep as the solvent evaporates.

A

Priming of the Dentin

43
Q

A primer is a _______ monomer. It has hydrophilic _______ and hydrophobic _______.

A

BIFUNCTIONAL…collagen…resin

44
Q

What is an example of a bifunctional primer (hydrophilic collagen and hydrophobic resin)?

A

HEMA

45
Q

Self-Etch (Two-Step): Combined _______ and _______.The second step is then _______.

A

Conditioner and primer….adhesive

46
Q

Big concept again: Most bonding is a result of _________ retention.

A

micro-mechanical

47
Q

Currently, best bonding takes place on a ______ surface and agents containing ____ and _____.

A

moist!…MDP and EtOH

48
Q

WHAT IS IRRADIANCE?

A

of photons per second emitted by light source per unit area of curing tip

49
Q

What is ENERGY DENSITY?

A

Irradiance x time

50
Q

YOU READY DAWG?? What are the 5 factors for how long it will take to adequately cure your composite with a light?

A

1.Energy Denisty (irradiance x time) 2.distance from composite 3.collimation of light 4.wavelengths (emitted and absorbed) 5.composite type

51
Q

Reciprocity of curing lights: the more irradiance = ____ amount of time.

A

LESS!

52
Q

Reciprocity of curing lightsL the less irradiance = ____ amount of time.

A

MORE!

53
Q

These will _______ curing time: owed irradiances, LED, Halogen, microfilm composites, darker shades, flowable composites, greater distances, poor collimation

A

INCREASE

54
Q

Thes will _______ curing time: higher irradiances, Plasma arc, hybrid composites, lighter shades, close distance, good collimation

A

DECREASE

55
Q

When in doubt of how long to cure the composite:

A

refer to the manufacturer’s guide!

56
Q

Which part of the bur fits into the hand piece?

A

the SHANK yo

57
Q

What connects the head of the bur to the shank?

A

the neck dawg

58
Q

What is the working part of the dental bur?

A

the HEAD brotha

59
Q

What shape of bur is a #6?

A

ROUND!

60
Q

What shape is a 33 1/2?

A

Inverted cone

61
Q

What shape is a 169L?

A

Taper

62
Q

What shape is a 245?

A

long cylinder/straight fissure

63
Q

a ______ angle= rake face ahead of the radius. it also minimizes _______ of the cutting edge.

A

a negative angle..fracture

64
Q

increasing the clearance angle _______ the edge angle

A

decreases (and therefore makes the blade weaker

65
Q

increasing the edge angle ________ the cutting edge

A

reinforces

66
Q

Carbide burs generally have negative _____ angles and

_____ angles of about 90 degrees.

A

rake….edge

67
Q

Without a coupling agent, your wear resistance is cut in _____!

A

HALF!

68
Q

The microfills have ______ filler material then the micro hybrids.

A

LESS

69
Q

The microfill has ______ polymer matrix then the micro hybrids.

A

MORE

70
Q

A microfill is going to absorb _____ water then a micro hybrid. Because it has _____ polymer matrix and it is not as _____ of a surface then a micro hybrid.

A

MORE…more..hard

71
Q

Composites have a _____ CTE then dentin or enamel.

A

HIGHER

72
Q

CTE for microHybrid is ______ than the CTE for a microfilled because Microfilled has more ______ present = more expansion.

A

lower…polymer

Dental Materials (11 decks)

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