Composites - indication
• Small – moderate cavities
- Good level of oral hygiene
- No heavy occlusal stress
- Dry operating field
Preparation for adhesive materials –
composites
• No extension for prevention (adhesion)
• No grooves
• No undercuts
• Rounded box
• Bevel the axial walls and the outer edge od
the gingival wall
• Small isolated cavities are possible
Cavity for amalgam
Cavity for composite
Bevel on the gingival wall
Preparation
do not bevel!!!
If out of enamel
Bevel of enamel on axial walls
Yes
No
Amalgam
Composite material
Monomer
Light
Polymerization
Polymer
Polymerization – light curing composites
- Mode of polymerization
Phases
- Pre-gel
- Gel-point
- Post –gel phase
Pre –gel
Gel
Post -gel
Pre gel phase should be long – soft start
1
2
3
Placement of the material
Correct
24
25
Matrices for composites in class II.
• Matrix band + matrix retainer
• Segmental matrix + separator
Sedelmayer
Alternative preparation – adhesive slot
Tunnel preparation
1. Low caries risk
2. Proximal ridge without infrac
3. Good cooperation
4. Small caries lesion
1. Magnification(Loups or microscope)
2. Miniinstruments
3. Dezinffection
4. GIC in capsules or composite
5. BW post op
Glassionomer and class II.
• Temporary filling – first phase for the
sandwich technique
• Tunnel filling (preparation)