Class IV
defects on proximal surfaces of incisors and canines with the loss of the incisal edge \
Reason: caries, trauma
Access
• Without any problems
• Remove the damaged enamel
• Separate teeth with the wooden wedge i
necessary
Outlines
According to the size of the defect
Retention
• Only composite is indicated micromechanical retention
Connection to dentin
Principally micromechanical
Bonding system
Resistance
Composite material: layering and good polymerization = good resistance
The enamel can be left without support of dentin on labial surface.
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Preparation Retentive border Acid etching Bonding
Placement of a matrix Layering of the composite