Final

Question 1

an adhesive joint consists of

a. adhesive surfaces with an adherent intermediate
b. adhesive intermediate with adherent surfaces

Answer 1

b. adhesive intermediate with adherent surfaces

Question 2

in regard to composite and tooth structure, which is hydrophobic and which is hydrophilic?

Answer 2

tooth structure is hydrophilic and composite is hydrophobic

Question 3

what are the adherent surfaces in a filling?

Answer 3

tooth structure and the composite/filling material

Question 4

when and who was the first person to come up with selective demineralization of enamel using etch?

Answer 4

M. Buonocore

1955

Question 5

when and who developed the first Bis-GMA resin?

Answer 5

R. Bowen

1962

Question 6

what are the proportions of enamel’s material?

Answer 6

95 hydroxyapatite
5 collagen
1 water
(in percent)

Question 7

what is the microscopic structure of enamel?

Answer 7

prisms of approx. 5-7 microns

10k crystals

Question 8

T or F

Enamel is a dynamic substrate subject to constant physiologic and pathological changes in composition and microstructure

Answer 8

False. dentin…

Question 9

which one of these DO NOT apply to dentin:

a. Permeable
b. Wet
c. Homogeneous tubular structure
d. Mineralized dentin
e. Collagen reinforced with inter- and intra-fibrilar apatite

Answer 9

Homogeneous tubular structure

its heterogenous, another flashcard explains what makes it heterogeneous

Question 10

Dentinal tubules contain:

a. Odontoblasts
b. Fluids
c. Nerve fibers
A and C
all the above

Answer 10

all the above

Question 11

1. the dentin is made up by intertubular and peritubular dentin. 2. intertubular dentin is more mineralized whereas peritubular is ideal for hybridization.
2. true 2. false
3. false 2. true
   both true
   both false

Answer 11

1. true 2. false

peritubular has more dentin and intertubular is ideal for hybridization AND has collagen

Question 12

what are 3 basic steps for enamel/dentin bonding?

Answer 12

1. etching/conditioning
2. primer
3. adhesive

Question 13

what is used to etch?

resin polymer
amphipathic monomer
acid 
solvent carrier 
base
more than 1 of these

Answer 13

acid

Question 14

what is the purpose of etching?

prepare and clean the surface
remove the smear layer
remove mineral
all the above

Answer 14

all the above

Question 15

what does the primer consist of?

resin polymer
amphipathic monomer
acid 
solvent carrier 
base
more than 1 of these

Answer 15

more than 1 of these

amphipathic monomer + solvent carrier

Question 16

in regards to the primer, whats the purpose of the amphipathic monomers?

a. have the hydrophilic end bond to the dentin and hydrophobic ends bond to the composite
b. have the hydrophilic end bond to the composite and hydrophobic ends bond to the dentin

Answer 16

a. have the hydrophilic end bond to the dentin and hydrophobic ends bond to the composite