Chapter 4 - Adhesive Materials

Front 1

What is acid etching?

Back 1

a micromechanical bonding technique, was used to retain pit and fissure sealants and later in placing composite restorations.

Front 2

What is an adherent?

Back 2

The surface.

Front 3

What is an adhesive?

Back 3

Micromechanical or chemical. Wets the surface.

Front 4

Define adhesive failure.

Back 4

A break at the interface

Front 5

What is biofilm?

Back 5

A coating of organisms. (plaque)

Front 6

Define cohesive failure.

Back 6

A break inside the bonding material.

Front 7

What is dentinal bonding?

Back 7

function by way of micromechanical bonding and secondary atomic bonds.

Front 8

What is enamel bonding resin?

Back 8

A low viscosity resin system.

Front 9

What are enamel tags?

Back 9

Microscopically roughened enamel surface.

Front 10

What are glass ionomer cements?

Back 10

Use poly acrylic acid and glass powder instead of zinc oxide.

Front 11

What is a hybrid layer?

Back 11

Resin and decalcified dentin. Involves secondary bonds of collagen and primer.

Front 12

Define interface.

Back 12

the junction of the restoration and the tooth.

Front 13

What is macromechanical bonding?

Back 13

the mechanism by which most glues join two pieces of wood, repair broken toys, and do many other things.

Front 14

Define margins.

Back 14

are the junction of the tooth and the restoration that is clinically visible.

Front 15

What is microleakage

Back 15

is the seeping and leaking of fluids and bacteria between the tooth/restoration junction.

Front 16

What are micropores?

Back 16

Same as enamel tags.

Microscopically roughened enamel surface.

Front 17

What is micromechanical bonding?

Back 17

bonding using surface irregularities smaller than can be seen with the naked eye.

Front 18

What is orthophosphoric acid?

Back 18

An acid or etchant, typically 37% strength that is applied for 15 to 30 seconds.

Front 19

Define percolation.

Back 19

Coefficient of thermal expansion of restorative materials does not match that of the tooth. They expand at different rates

Front 20

What are polycarboxylate cements?

Back 20

Cements that use polyacrylic acid and zinc oxide.

Front 21

What is postoperative sensitivity?

Back 21

Sensitivity that can be caused by microleakage.

Front 22

What are primers?

Back 22

They are low viscosity resins.

Front 23

What are resin tags?

Back 23

When resin material is locked in the dentinal tubules.

Front 24

Define what a smear layer is.

Back 24

Debris from being cut with a dental bur.

Front 25

What are the three advantages of using adhesion bonding in dentistry?

Back 25

-Retention of restoration

-Reduction of microleakage

-Reduction of recurrent cavities

Front 26

Who developed the idea of pit and fissure sealants in the 1950's?

Back 26

Dr. Michael Buonocore

Front 27

Who developed polycarboxylate cements in the 1970's?

Back 27

Dennis Smith in London. He combined polyacrylic acid with zinc oxide

Front 28

When were composite resins developed?

Back 28

1960's

Front 29

What is the difference between adhesive failure and cohesive failure?

Back 29

Adhesive failure - breaks at the interface of tooth and restoration

Cohesive failure - breaks inside the bonding material

Front 30

What is the most common acid used to etch teeth?

Back 30

Orthophosphoric Acid (37%)

Front 31

How many seconds is 37% orthophosphoric acid used to etch teeth?

Back 31

15-30 seconds

Front 32

What do deciduous teeth take a longer time to etch?

Back 32

The take longer to etch due to the irregularly placed enamel rods.

Front 33

Smear layer refers to what?

Back 33

The debris left on a tooth after being cut by a hand piece drill

Front 34

The "primer" is used as a?

Back 34

Wetting agent

Front 35

What are the steps in the 'three step' bonding system?

Back 35

Etch, apply primer, apply adhesive

Front 36

In the 'two step' bonding system the adhesive contains what two things?

Back 36

Primer and adhesive

Front 37

The adhesive mechanism of dentinal bonding is?

Back 37

Micromechanical as resin tags

Front 38

Glass ionomer cement is composed of what two things?

Back 38

Polyacrylic acid

Glass particles

Front 39

What does glass ionomer cement bond to teeth?

Back 39

The acid group reacts with the tooth structure and the glass so they are chemically bonded together.

Front 40

Postage stamps are now self-adhesive. The paper (actual stamp) is referred to as the _____________ and the sticky material on the back of the stamp is termed the ______________.

Back 40

Adherend, Adhesive

Front 41

Kristen has orthodontic braces. these include metal brackets directly bonded to the facial surface with a bonding material. One bracket breaks off, and the 'failure' occurs within the bonding material. This type of failure is considered to be?

Back 41

Cohesive failure

Front 42

What are the steps of the acid-etching process and restoration placement in correct sequence?

Back 42

1. Enamel is cleaned with pumice.

2. Clean surface is rinsed with water

3. Cleaned surface is dried with air

4. Etchant is applied

5. Etched surface is rinsed with water

6. Etched surface is dried with air

7. Bonding resin is applied

8. Restorative material is applied

Front 43

Dentinal bonding systems function by way of?

Back 43

Micromechanical bonding and secondary atomic bonds

Front 44

The "dentin debris" that is created when dentin is cut or prepared by dental instruments is called?

Back 44

Smear layer

Front 45

An adhesive mechanism of a dental bonding system is a hybrid layer. It is composed of:

Back 45

Resin and decalcified dentin

Front 46

What are the historical fallacies about dentinal bonding?

Back 46

-Composities irritate the pulp

-Dentin should not be etched

-The smear layer should be left to protect the pulp.