dental composites

2. By
NimrahRazzaqueMemon
DCP; BatchVSem.V;Dental
Tech.

3. OBJECTIVE
•Classification of composites
•Properties of composites
•Polymerization of composites
•Application of composites
•Advancement of composites
•Indirect composites

4. CLASSIFICATION OF
COMPOSITES
•A/cTo Skinner
•Bayne & Hayman Classification
•A/cToViscosity
•Phillips & Lutz Classification

5. A/c To Skinner
•Traditional or conventional ----- 8-12 micron
•Small particle filled composite ----- 1-5 micron
•Microfilled composite --------- 0.4-0.9 micron
•Hybrid composite ----------- 0.6-1 micron
Bayne & Hayman Classification
•Megafill----------- 1-2mm
•Macrofill-----------10-100 micron
•Midifill--------------1-10 micron
•Minifill--------------0.1-1 micron
•Microfill-------------0.01-0.1 micron
•Nanofill--------------0.005-0.01 micron

6. A/cToViscosity
•Flowable Composites
•Packable Composites
Phillips & Lutz Classification
•Macrofilled Composites-------- 5-12 micron
•MicrofilledComposites--------- 0.04-0.1 micron
Hybrid Composites--------------- 0.04 micron
*Nanofills & Nanohybrid Composites
*Microhybrid Composites

7. PROPERTIES OF COMPOSITES
•Coefficient of thermal expansion – 3 times higher than normal tooth,
micro fills show more .
•Water absorption – high filler content lower is the water absorption.
•Wear resistance – prone to wear, it is effected by size, shape & content of
filler.
•Surface texture – size & composition of filler determines smoothness.
•Radiopacity – resins are translucent, fillers like barium, glass, strontium &
zirconium makes it radiopaque.
•Solubility - there is no significant solubility , 0.5-1.1 mg/cm3 water solubility
•Polymerization shrinkage - shrinks while curing.
•C-factor – it’s the ratio of bonded surface of restoration to unbonded
surface, high value shows greater shrinkage.
•Aesthetics – translucent, available in variety of shades.

8. POLYMERIZATION OF
COMPOSITES
It depend upon the following factors
•Curing time – short exposure time cause accelerated ratio of curing which
leads to substantial stress buildup
•Shade of composite – dark shade require long curing time
•Distance & Angle b/w light source & Resin – angle of source should be at
90 degree to resin, if angle diverges from 90 degree.
•Temperature – composite curing would be less if they are taken but
immediately from refrigerator.
•ResinThickness – It should be ideally 0.5-0.1 mm for optimum
polymerization of resin
•Inhibition Of Air – O2 in air also effects the polymerization of resin.
•Intensity Of Curing Light – for optimal results wavelength of light should
range b/w 400-500 mm
•Type Of Filler – micro fine composites are more difficult to cure than
heavily loaded.

9. APPLICATION OF COMPOSITES
TYPE OF RESTORATION
RECOMMENDED RESIN
COMPOSITE
 CLASS I – CLASSV
 CLASSVI
 CERVICAL LESIONS
&PEDIATRIC
RESTORATIONS
 3 UNIT BRIDGEOR CROWN
 ALLOY SUBSTRUCTURE
 CORE BUILD UP
 TEMPORARY RESTORATION
 HIGH CAVITY RESTORATION
 MULTIPURPOSE, NANOCOMPOSITE,
PACKABLE MICROFILLED,
COMPOMERS.
 PACKABLA NANOCOMPOSITES
 FLOWABLE,COMPOMER
 LABORATORY (FRC)
 LABORATORY (BONDED)
 CORE
 PROVISIONAL
 HYBRID COMPOSITE

10. ADVANCE COMPOSITES
•COMPOMERS
•OVMOCERS
•ANTIBACTERIAL COMPOSITES
•SMART COMPOSITES
•LAB COMPOSITES
•CORE- BUILD UP COMPOSITES
•SILORANE COMPOSITES

11. INDIRECT COMPOSITES
It includes:
•FIBRE REINFORCED
COMPOSITES
•CEROMERS

12. REFERENCES
•Textbook of operative dentistry
by nisha garg
•Craig’s restorative dental
materials

14. THANK YOU