Dental Materials - Restorative Resins (2)

Front 1

DC stands for what?

Back 1

degree of conversion

Front 2

DC measures the % of what?

Back 2

the % of double bonds consumed

Front 3

Fill in the missing number. DC = (1-R) x ?

Back 3

100

Front 4

What is R in the DC formula?

Back 4

ratio of unreacted methacrylate groups before and after polymerization

Front 5

Higher DC = (higher, lower) strength and wear resistance

Back 5

higher

Front 6

DC falls in about what % range for most resin?

Back 6

50-70%

Front 7

What is the 'depth of cure' for a resin? What is the average depth of cure in mm?

Back 7

the depth at which light can reach to convery a resin from monomer to polymer form; 2-3mm

Front 8

If you increase light intensity, you (shorten, lengthen) the curing time OR you (increase, decrease) the depth of cure for a given exposure time

Back 8

shorten, increase

Front 9

Overtime in QTH units the light intensity (increases, decreases, stays the same)

Back 9

trick question, could be any of these! QTH systems are unpredctable overtime

Front 10

True or False, there are specific resins for anterior and posterior portions of the teeth, as well as universal resins for all teeth

Back 10

True.

Front 11

Nano-filled resins have filler particles that are < or = to ??? Nanometers

Back 11

100

Front 12

Composite resins are classified based on their average ___ size as well as the ___ of those.

Back 12

particle, distribution

Front 13

Traditional macro-filled resins have particles in the ???-??? Micrometer range

Back 13

8 to 12

Front 14

Small particle-filled (SPF) resins have particles in the ???-??? Micrometer range

Back 14

1 to 5

Front 15

hybrid resins have particles in the ???-??? Micrometer range

Back 15

.5 to 1.0

Front 16

microfilled resin has particle sizes in the ???-??? Micrometer range

Back 16

.04-.40

Front 17

Traditional composite is 70-80wt% (or 60-__vol%) ground amorphous silica and ___ filler, which are radio(opaque, lucent)

Back 17

70, quartz, lucent

Front 18

Properties of traditional composite are (better, worse) than unfilled acrylic resin

Back 18

better

Front 19

It is better for a resin to have (high, low) thermal expantion coefficient

Back 19

low

Front 20

Small particle-filled (SPF) resin have (more, less) inorganic filler than traditional resins

Back 20

more

Front 21

Small particle-filled (SPF) resin have heavy ___ containing ___ filler for radioOPACITY

Back 21

metal, glass

Front 22

What helps adjust viscosity in small particle-filled (SPF) resins?

Back 22

colloidal silica

Front 23

Which of the 4 resin types has the most superior physical and mechanical properties?

Back 23

small particle-filled

Front 24

Microfilled composite tends to have (high, low) viscosity due to the presence of ___ silica filter

Back 24

high, pylorytic

Front 25

Microfilled composite has a very (smooth, rough) finish

Back 25

smooth

Front 26

Microfilled composite contains (pre, post)polymerized filler

Back 26

pre

Front 27

Microfilled composite are (bad, good) in stress-bearing situations

Back 27

bad

Front 28

Hybrid resins are (better, worse) at stress bearing than microfilled

Back 28

better

Front 29

Microfilled resins have (good, bad) esthetic properties

Back 29

good

Front 30

Hybrid resins have (higher, lower) filler loading than small particle-filled resins

Back 30

lower

Front 31

Flowable composites are modified with reduced filler for more flow. They are typically less filled versions of what two resins?

Back 31

hybrid, small

Front 32

What type of resin is good where access is limited?

Back 32

flowable

Front 33

What type of resin is used as a "preventive resin resotration"

Back 33

flowable

Front 34

Flowable are (more, less) suseptible to wear and have (higher, lower) polymerization shrinkage than filled

Back 34

more, higher

Front 35

Flowable composites are used for the entire filling most of the time, T of F?

Back 35

False, you should only use it to line the cavity to get into spaces

Front 36

Posterior composite resins usually contains (more, less) filler particle of a (large, small) range

Back 36

more, smaller

Front 37

Direct posterior composites are (more, less) polishable than tradiational composites

Back 37

less

Front 38

Direct posterior composites have (high, low) rates of occlusal wear

Back 38

high

Front 39

Packable composite resin is (highly, not highly) filled

Back 39

highly

Front 40

packable composite resin (should, should not) be bonded to the tooth

Back 40

should

Front 41

Which composite resin has handling properties similar to amalgam?

Back 41

packable composite resin

Front 42

Packable composite resin has (low, high) shrinkage, (low, high) wearing rates, (low, high) depth of cure and are very (flacid, stiff)

Back 42

low, low, high (5mm), stiff

Front 43

Packable composite resin has (good, bad) interproximal contacts, (good, bad) adaptation to tooth, (high, low) viscocity, (easily, not easily) polishable

Back 43

bad, bad, high, not easily

Front 44

Indirect posterior composites are made in the (lab, dental office) and then cemented to the tooth

Back 44

lab

Front 45

Direct inlay resins is where the inlay is made in ___ and indirect, the inlay is made in ___

Back 45

patient's mouth, lab

Front 46

Veneer used to be made of (bis-GMA, PMMA) but are now made of (bis-GMA, PMMA) as the matrix

Back 46

PMMA, bis-GMA

Front 47

Veneers made with composite resin are (easy, difficult) to fabricate, but have (high, low) proportional limit

Back 47

easy, low

Front 48

What causes marginal leakage in composites?

Back 48

polymerization schrinkage at gingival margins; coefficient of thermal expansion

Front 49

Composites typically (do, do not) have water sorption and have (high, low) wear resistance, in general.

Back 49

do, low

Front 50

Which have better mechanical properties, amalgam or composites?

Back 50

amalgam (but youz will getz tha mercury poizioning lolz)

Front 51

True or False, composite bonds directly to the tooth

Back 51

False, does not

Front 52

True or False, composite is considered "technique-sensitive"

Back 52

TRUE.

Front 53

What is the ability of a chemical from the environment to mimic the effect of estrogen in the body?

Back 53

estrogenicity (drrrrr)

Front 54

Something from the environment that mimics estrogen is called a what?

Back 54

xenoestrogen

Front 55

True or False, bisphenol A (BPA) has been hypothesized as a xenoestrogen

Back 55

True.

Front 56

True or False, of all components of resin, methyl methacrylate is the only one that's never been shown to be an allerginistic

Back 56

False, it DOES have allergenistic properties

Front 57

Allergic contact dermititis is (dependent, independent) upon the dose of a material

Back 57

independent