Operative Test 1 Flashcards

1
Q

GI is _ based

Composites are _ based

A

Water

Polymer

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2
Q

How does GI attach

A

Chelates with HA surfaces

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3
Q

Composite adhesives need what

A

Demineralized dentin surface with exposed collagen

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4
Q

GI conditioners are what and what do they do

A

Mild organic acids

Solubilizes smear layer
Removes smear layer
Leaves smear plugs intact

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5
Q

T/F conditioners demineralization dentin and enamel

A

False. Don’t demineralization either

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6
Q

Conditioners vs. enchants

A

C: leaves smear plugs intact
Doesn’t demineralize
Cleans surface

E: removes smear layer
Demineralizes surface dentin
Leaves collagen surface with pores

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7
Q

What s the powder in RMGI

What is the liquid GI vs. RMGI and pH

A

CaFAlSiO2 glass

GI:
Water
Polyacid copolymers
pH 1

RMGI:
35% water
35% methacrylate modified polyacid copolymers
30% HEMA
pH 2
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8
Q

Disadvantages of GI

A
Slow setting
Early dissolution
Opaque
Bad stain resistance
Weak
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9
Q

Class V axial depth

A

1.2

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10
Q

4 functions of dentin/pulp complex

A

Formative (1/2 dentin)
Defensive (reparative dentin)
Nutritive
Sensory

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11
Q

5 things tubule fluids detect

A
Osmolarity changes
Thermal changes
Desiccation
Pressure changes
High-speed cutting
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12
Q

Reversible pulpitis needs to be treated how

A

With a base

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13
Q

3 tests to test pulp status

A

Cold/hot
Electric pulp test
Percussion test

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14
Q

Purpose of liners and bases

A

Protect pulp and minimize sensitivity

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15
Q

Liner to use with amalgam

A

Copalite

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16
Q

Liner to use with composite

A

Vitribond, seals dentin below composite

17
Q

Purposes of liners

A

Protect dentin from residual reactants
Electrical insulation
Thermal protection
Pulpal treatment

18
Q

Why are liners important for composites

A

Etching can cause a negative rxn if not sealed

19
Q

5 types of liners and an example of each

A

Solution liners(copalite, adhesive)

Suspension liners(CaOH2)

Cement liner (GI)

Eugenol liners (ZOE)

Dentin bonding systems (optibond)

20
Q

Setting rxn of solution liner

A

Evaporation

21
Q

Affected vs. infected dentin

A

Take out infected dentin

Leave affected dentin

22
Q

4 types of bases

A

Zinc phosphate
ZOE
Polycarboxylate
GI/RMGI

23
Q

What do you use with RMGI

A

Light cured CaOH

24
Q

Where do you mix ZnPO4, why

A

On a cool slab, absorbs heat of rxn and permits more powder to be incorporated

25
GI vs ZnPO4
``` GI: adheres to tooth structure Fluoride release Better retention Dimensionally stable Biocompatible ```
26
How do CaOH liners work
Release OH ions | Stimulate odontoblast formation
27
ZOE is a _ _ material
Intermediate restorative material
28
For deep excavation (RDT <0.5 mm), OSU recommends _ after _
GI/RMGI after CaOH
29
When to replace a cusp
Facial or lingual extension exceeds 2/3 from primary groove to cusp tip
30
Pin size we use
0.021”/ 0.525mm
31
2/2/2/2 rule
2mm pin hole depth 2 drill diameters inside DEJ 2mm length of pin 2mm of amalgam over pin