composite restorations a different way of thinking

Question 1

Composite resin

Answer 1

complex material in which two or more distinct complementary substances combine to produce structural or functional properties not present in any individual component

Question 2

composition of dental composite resin and percentage

Answer 2

resin matrix(25%)
- moomer
- photoinitiator
- accellerator
- stabliser
- inhibitor
Filler (75%)
- silane treated silica

Question 3

what is a common photo initiator

Answer 3

camphorquionone

Question 4

what are examples of monomers

Answer 4

TEGDMA
BisGMA
UDMA

Question 5

Examples of accelerator in resins

Answer 5

4 dimethylaminobenzoate ester

Question 6

examples of stabliizser

Answer 6

butilated hydroxytouene

Question 7

example of resin inhibitor

Answer 7

2 hydroxy 4 methoxybenxopheone

Question 8

classification catagoeies of dental composite resin

Answer 8

initiation technique
viscosity
filler size
clinical application

Question 9

typesof initiation techniques

Answer 9

heat cure
self cure
light cure
dual cure

Question 10

viscosity types

Answer 10

flowable

packable

Question 11

filler size types

Answer 11

macrofilled
microfilled
nano filled
hybrid

Question 12

clinical application types

Answer 12

direct (anterior posterior)

indirect in the lab

Question 13

advantages of composites

Answer 13

1) Aesthetics
2) bonding to tooth structure
3) tooth sparing preparation
4) less costly and more conservative alternative to indirect restoration
5) easily repaired
6) reduced quantity of mercury exposure and environmental release
7) lack of corrosion

Question 14

disadvantages of composites

Answer 14

1) composite shrinkage and microleakage
2) post op sensitivity due to microleakage
3) secondary caries
4) chipping and lower wear resistance than amalgam
5) technique sensitive
6) adverse biological reactions

Question 15

what can dentine bonding agents cause (buiological considerations)

Answer 15

some pupal reactions

Question 16

biological considersations of dental composite resins

Answer 16

oral lichenoid reactions

allergic reactiosn

Question 17

biological considerations of indirect resin based materials

Answer 17

allergic reactions in patients, hand dermatitis in tehcnitiosn

Question 18

aesthetic considerations colour wise in composites

Answer 18

Hue
Saturation
Value

Question 19

what is hue

Answer 19

the actual colour

Question 20

what is saturation

Answer 20

how strong the colour is

Question 21

what is value

Answer 21

darkness/lightness of the colour

Question 22

translucency

Answer 22

ability of the material to transmit light

Question 23

dual shade dental composite resins

Answer 23

has enamel and dentine shade to match therefore providing ideal shade and translucency

Question 24

Dentine bonding agen tyoes

Answer 24

2 step(etch and rinse- primer and bond together) or (self etch primer- etch and prime toegether)
3 step
1 step(self etch adhesive)

Question 25

benefits of adhesion

Answer 25

1) creates a strong attachment to tooth tissue
2) resists polymerisation shrinkage and minimises leakage
3) tooth preparation limited to damaged/lost tooth tissue (no need for mechanical undercut)
4) supports weakened tooth structure
5) optical integrity at cavity margins

Question 26

indications for composite

Answer 26

1) restoration of caries
2) repair of enamel and dentine fractures
3) tooth wear rehabilitation
4) to mask mild discoloration
5) as a temporary restoration for indirect veneer preparations

Question 27

contra indications for composite

Answer 27

1) where there is insufficient tooth structure and enamel present for bonding
2) deep subgingival caries where moisture control is not possible
3) indirect restorations may be more appropriate for severely damaged and heavily restored teeth
4) allergic reaction to resin based dental materials

Question 28

which technique for composites shows the most success

Answer 28

restorations with hybrid and microfilmed composites that were placed with enamel etching and rubber dam