Sweep

Question 1

Water based, Acid base rxn, Adheres directly to tooth

Answer 1

RMGI, GI

Question 2

Polymer based, free radical set rxn, requires adhesives

Answer 2

Composite, compomers

Question 3

•
Ionomers
attach by

Answer 3

chelating with HA surfaces

metal ions

Question 4

Ionomers
need a —— dentine surface with
exposed =======

Answer 4

clean intact

mineral

Question 5

Adhesives need a —— dentin surface with

exposed ———

Answer 5

demineralized

collagen

Question 6

Conditioners (used with Glass
ionomers
)
•

Answer 6

Mild organic acids
•
Solublizes
 smear layer
•Remove smear layer
•
Leave smear plugs intact
•
Does not 
demineralize 
dentin 
or enamel
•
Cleans surface

Question 7

•
Etchant (used with composite
materials)

Answer 7

•
Inorganic acid 
•
35% phosphoric acid 
•
Completely removes smear 
layer and plugs
•
Demineralizes
 surface dentin (2-
10 μ
m)  
•
Leaves a collagen rich surface with 
numerous pores

Question 8

Gi powder is

Answer 8

nonsilanated

Question 9

GI GLASS IONOMER REACTION

•

Answer 9

GI mix applied
•
Acid matrix dissolves 
periphery of glass
•
Glass releases Ions
•
Ca
\+2
, Al
\+3
, F
-
•
Divalent Ca ions 
quickly chelate with 
acid polymer chains

Question 10

GI GLASS IONOMER REACTION 
•
Next 24 
-72 hours
•
Al
\+3
 replace

Answer 10

Ca
\+2
•
Increase strength 
•
F
-
 released 
•

Question 11

GI Acid side groups
also can
•
Chelate with

Answer 11

glass
•
Chelate with HA

Question 12

RMGI
•
Modified Liquid
•

Answer 12

35% water
•
35% methacrylate modified 
Polyacid
 copolymers
•
Long chain polymers
•
Carboxylic acid reactive groups
•
\+ Methacrylate 
reactive group

•
30% HEMA
•
pH = 2.0

Question 13

RMGI: swelling/shrinking

Answer 13

Polymerization 
shrinkage
•
swelling from water 
sorption 
– zero net 
dimensional change

Question 14

RMGI free radical rxn

Answer 14

occurs quickly to protect from early solubility

Question 15

RMGI improvements

Answer 15

ADVANTAGES OF 
GI AND RMGI 
•
Provide a good seal between dentin and restorative
•
Ionic bonding “chelation”
•
Have some recurrent caries inhibition potential
•
Rarely see caries around GIs or RMGIs
•
RMGIs have improved solubility resistance ( 
vs   GI)
•
RMGIs have improved strength but less stiffness (
vs   GI)
•
RMGIs have improved optical properties (
vs   G

Question 16

When excavating caries, clear

Answer 16

DEJ first

Question 17

Conventional class V grooves

Answer 17

incisal gingival, just inside DEJ

Question 18

CLASS V DIMENSIONS

Answer 18

•
Gingival Margin follows gingival @ ½ 
mm above FGM
•
Incisal
 margin concentric with gingival 
margin  1.5 mm I
-G height
•
Axial depth-
 1.2 mm @ incisal
 and 1 mm 
@ gingival
•
Gingival floor follows curvature of tooth 
•
Mesial
 distal length 
–extend to line 
angles of tooth 
•
90°
 cavosurface  
margins

Question 19

Pulp pain is usually

Answer 19

sharp

Question 20

Dentin Bonding Systems/Sealers

Answer 20

–
Optibond
Solo Plus/Gluma

Question 21

•
If RDT is 0.5-
2.0 mm

Answer 21

•
Base (replaces missing 
Dentin)
–
GI (base)
–
ZnPO4 (base)
•
Liner
–
Copal varnish
–
Adhesive

Question 22

Bases and Liners
– often only differ
by

Answer 22

P/L ratio

Question 23

Acid of GI dissolves glass, Calcium chelates with

Answer 23

acid polymer chains. Aluminum then replaces over the next 3 days.

Question 24

GI acid side chains can also chelate with

Answer 24

glass, HA

Question 25

CaOH2 liner

Answer 25

•
Ca
\+
 ions act to crosslink polyphenol groups
•
Insulator

Question 26

B&T

Answer 26

(base and temporary)
–
Reinforced fillers (PMMA beads
-powder)
–
ZnO (powder)
–
Eugenol (liquid) oil of clove

Question 27

ZOE cannot be used

Answer 27

under composite

Question 28

Bend a pin when doing an

Answer 28

RUC

Question 29

Types of pins

Answer 29

Friction locked, cemented, threaded

Question 30

2 – 2 – 2 - 2 Rule:

Answer 30

2mm pin hole depth
2mm pin hole depth
2 drill diameters inside DEJ
2 drill diameters inside DEJ
2mm length of pin
2mm length of pin
2mm amalgam over pin
2mm amalgam over pi