dental cements ch 44-45

Question 1

dental (cavity) liners do what

Answer 1

lines, seals, protects, regenerates

Question 2

material placed in a thin layer on the walls and floors of the cavity prep. It protects the pulp from bacteria and irritants

Answer 2

liners

Question 3

uses and characteristics of calcium hydroxide (dycal)

Answer 3

pulp protector, used when pulp exposure expected.

very soluble

Question 4

commonly used dental liner

Answer 4

dycal (calcium hydroxide)

Question 5

when do you use dycal

Answer 5

protects pulp from chemical irradiation by sealing it.

Stimulates production of reparative or secondary dentin

Question 6

advantages of liners

Answer 6

biocompatibility and its ability to stimulate reparative dentin

Question 7

disadvantage of liners

Answer 7

has low compressive strength.

Very soluble

Question 8

where is the liner placed

Answer 8

on the deepest dentin surface of the preparation . NOT to be placed on the enamel or in a groove

Question 9

indication for use - what varnish does

Answer 9

seal dentinal tubules.
reduce micro leakage around a restoration.
Act as a barrier to protect tooth from highly acidic cements

Question 10

when to apply varnish and where

Answer 10

applied after the liner and or insulating base .
Thin coat on the walls, floors and margin of cavity preparation .
Apply second coat

Question 11

what is varnish applied with

Answer 11

a cotton pellet and sterile cotton pellet forceps or applicator brush

Question 12

what prevents or treats hypersensitivity

Answer 12

desensitizer aka primer

Question 13

seals the dentinal tubules to prevent oral fluids from seeping in between the tooth and restoration , which can cause sensitivity

Answer 13

desensitizer aka primer

Question 14

desensitizer application process

Answer 14

apply the dentin sealer with cotton tripped applicator.

Apply over all areas of the exposed dentin

Question 15

dental bases provide pulpal protection to which 3 bases

Answer 15

protective base, insulating base, sedative base

Question 16

protect pulp before restoration is placed . Reduces postoperative sensitivity and damage to pulp

Answer 16

protective base

Question 17

placed in deep preparations to protect the tooth from thermal shock

Answer 17

insulating base

Question 18

sedative base

Answer 18

soothe pulp that has been damaged by decay or irritated during process of removing decay

Question 19

luting agents

Answer 19

bonding or cementing together (glue). Could be permanent or temporary

Question 20

IRM

Answer 20

intermediate restorative material

Question 21

permanent cements

Answer 21

long term cementing agent

Question 22

temporary cements

Answer 22

short term cementing agent ( when dentist needs to remove the restoration at a later time)

Question 23

t/f; cement should be mixed so that it appears similar to syrup and mix should string up and break about 1inch from the slab

Answer 23

TRUE

Question 24

base/temporary restoration consistency

Answer 24

thick, putty like.

Slightly tacky but able to be rolled into a ball (like play dough)

Question 25

contains oil from cloves, which has a soothing effect on the pulp , some patients may be allergic

Answer 25

zinc-oxide eugenol (ZOE)

Question 26

not as strong and is used for temporary restorations and cementation;

Answer 26

ZOE type I

Question 27

has been reinforced and is stronger, and can be used for permanent cementation.

Answer 27

ZOE type II

Question 28

used for short term restorations, sedative dressing, or insulting/sedative base

Answer 28

ZOE type III

Question 29

ZOE liquid/powder

Answer 29

mixed on oil-resistant paper pad.
Mixing time 30-60 secs.
Setting time in mouth 3-5 mins

Question 30

ZOE paste

Answer 30

supplied as two paste system as temporary cement .

Oil-resistant paper pad and mixed

Question 31

reduces sensitivity to tooth.
Maintains function and edthetics to tooth until permanent restoration .
Prevents shifting of adjacent tooth .
Lasts 6 months

Answer 31

intermediate restoration

Question 32

zinc phosphate Type I (fine grain)

Answer 32

used for permanent cementation of cast restoration like crowns, inlays, bridges.
Creates thin film layer

Question 33

Zinc phosphate Type II (medium grain)

Answer 33

use as insulating base for deep cavity preparation

Question 34

not as strong as zinc phosphate, but less irritating to pulp.

Answer 34

polycarboxylate cement

Question 35

permanent cement for cast restorations, stainless steel frowns, and orthodontic bands.
Non-irritating liner under both composite or amalgam restorations.

Answer 35

use of polycarboxylate

Question 36

purpose of a dental liner is to

Answer 36

protect the pulp from any irritation

Question 37

what tooth structure is calcium hydroxide placed in the prepared tooth

Answer 37

dentin

Question 38

the key ingredient in varnish is

Answer 38

resin

Question 39

another name for dentin sealer is

Answer 39

desensitizer

Question 40

what does a cavity sealer seal

Answer 40

dentin tubules

Question 41

an insulating base is placed to

Answer 41

protect the pulp from thermal shock

Question 42

what effect does eugenol have on the pulp

Answer 42

soothing

Question 43

what dental instrument is selected to press a base into the cavity prep

Answer 43

condenser

Question 44

purpose of dental bonding material is to

Answer 44

bond restorative material to the tooth structure

Question 45

what is removed from the tooth structure before a bonding material is placed

Answer 45

smear layer

Question 46

which sequence is recommended for the application of supplementary materials for a deep restoration

Answer 46

liner, base, dentin sealer, bonding system