preparace kavity iii. třídy - masaryk universityclass iii. proximal surface of frontal teeth...
TRANSCRIPT
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Class III.
Proximal surface of frontal teeth (incisors and
canines) without loss of the incisal edge
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Access to the cavity
Through the enamel from the oral side
- the round diamond, obliquely from the
side of the neiborough tooth
Removal of old filling
Separation of teeth using wooden wedges
can be helpful
Removal of hyperplastic gingiva
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Cavosurface margin
The size of the cavity depends on dental
caries, do not extend!!!
Excavation of carious dentin
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Retention
Enamel must be beveled (retentive border –
shallow groove).
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bevel
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Dry operating field
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Acid etching
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Bonding
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Surface morphology
for adhesion
Enamel
- regular surface with opened inter/intraprismatic
spaces
Dentin
- no smear layer
- opened dentinal tubules
- collagen network
available
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Control of cavities
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Etching, rinsing, drying
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Bonding
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Cleaning of teeth
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Cavity preparation
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Etching
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During acid etching and preparation
the protection of neiborough tooth is necessary
using a metal strip
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Matrix and wedge, bonding
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Layering of composite
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Layering of composite
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Before finishing
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Matrix has been removed
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Finishing
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Polishing
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Finished filling
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