Composites
Chemically bonded mixture of organic matrix (resin) ane inorganic filler
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Composition
• Organic phase - resin
Bowen's monomer - bisfenol A a
glycidylmetacrylate- Bis GMA
Other dimetacrylate
UDMA
TEGMA
3
Composition
•   Inorganic phase - filler
Milled qua
Baryumaluminium glass Silica Prepolymer
6284
4
Composition
•  Initiatory system initiator a activator
•  Stabilizers
•   Pigments
•   UV absorbers
•  Antioxidants
5
Curing of com
Polymerization Activator
Iniciátor
Splitting of double bonds Creation of the polymer network
Composite according to mode
of curing
öDChemically curing öDLight curing fíDDual curing fíDWarm curing
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Polymerization
Monomer
Polymer
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Polymerization shrinkage
Pre -gel G-point Post -gel
Classification according to type of fillers
(Philips & Lutz 1984)
Macrofiller
Macrofiller Composite
Microfilier
(pyrogenic Si02)
Hybrid Composite
homogenious Microfilier Composite
Microfiller-complexes
inhomogenious Microfiller-Composite
Filler particles		
Filler size (medium particle size)	Composite category	
< 10 |jm	hybrid composite	
< 5 |jm	fine particle hybrid	
< 3 |jm	ultrafine particle hybrid	
< 1 |jm	submicron hybrid	
Use of Composites
•   Aesthetic restorations
•  - class III., IV., V., I., II.

Ablation of
the aprismatic enamel
Acid etching
Dentin
o More water and organic substances
o Low surface energy
o Tubular liquid
o Comunication with the pulp chamber
o Smear layer

Removing of the smear layer
Acid etching
Konditioner
Demineralization
Increase of the surface energy
Phosphoric acid
Primer
Opening og the collagen network of dentin
Bond
•   Penetrates into the retentive pattern in enamel and the collagen network of dentin (hybrid layer)
Glasionomer cements
• Composition
Powder:   asluminiumsilicate glass
Tekutina:
Polyacrylic acid or polymaleic acid
Tartaric acid
Water
Curing of GIC
Aluminium calcium polyacrylate
Properties
>  Chemical fixation to tooth structure
>  Fluoride release
>  Favorable thermal expansion
> Acceptable aesthetics
GIC according to mode of
curing
> Chemically curing (acid - base reaction)
> - conventional
> - high strength
>  Light curing (acid -base reaction + polymerization of the resin)
LiUULS LOJ
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GIC - indication
•   Class V, small class I., class III.
•   Base - sandwich fillings
•   Luting cements
•   Root canal filling
Glasionomers
•   Hand mixed
Check the mixing ratio - the drop without any bubbles
•   Power mixed - capsulated- aktiovation of a Capsula
Forceps fo activation, forceps for application