Black class I. and II. composite fillings Dental matrix...
Transcript of Black class I. and II. composite fillings Dental matrix...
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Black class I. and II.
composite fillings
Dental matrix systems
and its useDR. KÁROLY BARTHA
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Black Class I.
definition
extended fissure sealing
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Black Class II
definition
MO/OD/MOD
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Limits of the use of composits
Not indicated:
problems with isolation
full contact with opposite tooth
bruxism
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Usual Steps of an Composite
Restoration
Medical history, diagnosis, (X-ray.) Anesthesia
Shade selection
Cavity preparation
Isolation
Adhesive technique
Inserting and curing the composite
Contouring and polishing the composite
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Shade selection
Drying and dehydration of the tooth
Isolation (before-, color)
Applying and curing a small amount of the
composite
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Adhesive technique
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Inserting and curing the
composite
Class I.
Class II.
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Disadvantages of the
composite
Polymerization shrinkage
Higher thermal expansion coefficient
No adhesion or chemical bond
Solution - adhesive technique
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C-factor (configuration-factor)
The ratio of bound-to-unbound surface
areas
10Sturdevant‘s Art &Science of Operative Dentistry 4th ed. Mosby
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Methods of reducing the
polymerization shrinkage
Further development of the composite
Incremental filling technique
Direction of the curing light
Method of the curing
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Incremental filling technique
Horizontal – occlusogingival layering
when cavity< 1/3 width of the toot
Oblique layering
Faciolingual layering
Bulk-fill
Bio-mimetic
Horizontal-split technique
Centripetal technique
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Increment technic
- occlusogingival layering
Wide cavity – fracture
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Increment technic
- oblique layering
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Increment technic
- use of flow composite
Better marginal seal
„Stress-breaker” function
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Increment technic
- faciolingual layering
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Increment technic
- bulk-fill
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Increment technic
- bulk-fill
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Increment technic
- bio-mimetic
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Direction of the curing light
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Method of the curing
„Soft start” polymerization
As near as possible
Metal matrix can inhibit
Diameter of the light guide
Cleanness of the light guide
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Method of the curing
„Soft start” polymerization
As near as possible
Metal matrix can inhibit the effect
Diameter of the light guide
Cleanness of the light guide
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Black Class II. composite
fillings
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When are the matrix systems
necessary?
Preparation
to protect the neighboring tooth
Plastic fillings
to shape (proximal contact)
for replacement of missing wall(s)
during the cementation of inlays/onlays
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Expectations - use of matrix
system
No gap, good seal
Proximal contact
Higher than the tooth
Well fixed
Easily removable
Transparent
Impermeable
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Matrix is usable when…
There are some place between the teeth
If not, we make
Horico strip
Fast-separation (wedge)
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We use the matrix strip
(fast every time) with a wedge
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Use of the wedge
To put the matrix strip to the tooth
To fix the matrix strip
Separation
(Bleeding control)
To protect the interdental papilla
Light transmitting wedge - polymerization
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The use of the wedge
32Sturdevant‘s Art &Science of Operative Dentistry 4th ed. Mosby
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The use of the wedge
33Sturdevant‘s Art &Science of Operative Dentistry 4th ed. Mosby
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The use of the wedge
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Wedges
Wooden
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Wedges
Plastic
Formed
Curved (Curvy, VoCo)
V-shaped
Light transmitting
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During preparation
Common metal matrix
Special product
„Matrix”
Wedge
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Plastic fillings
Black Class III. and IV.
Root surface fillings
Black Class II.
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Front-teeth - Black Class III.
Transparent matrix – polyester strip
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Hawe Stopsrip
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Front-teeth Black Class IV.
Polyester strip
Silicone key
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Use in U-shape (from Tuza E.)
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Silicone key (from Tuza E.)
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Cervical fillings – cervical matrix
Composite
GIC
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Cervical fillings
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Black Class II.
Dental amalgam – metal matrix
Composite –metal- or plastic matrix
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Matrix + matrix retainer or
holder together (wedged)
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Amalgam filling
Dental amalgam is condensable - tight
proximal contact
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MO or OD cavity
Ivory matrix retainer + matrix band
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MOD cavity
Conventional matrix retainer – with matrix
band
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MOD cavity
Tofflemire matrix retainer with Tofflemire
matrix band
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MOD cavity
Tofflemire matrix retainer with Tofflemire
matrix band
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Conic matrix band –
disadvantageous form
During finishing proximal
contact disappeared
Fracture of filling
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Composite filling
It could be difficult to achieve a tight
proximal contact
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Tofflemire matrix retainer with
plastic matrix band
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Lucifix (KerrHawe)
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Special matrix systems
AutoMatrix (Dentsply)
MaximatPlus (Polydentia)
SuperCap (KerrHawe)
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The use of matrices
58Sturdevant‘s Art &Science of Operative Dentistry 4th ed. Mosby
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Special matrix system – Walser
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Special matrix systems –
sectional matrix
Palodent / Palodent Plus (Dentsply)
Hawe Adapt sectional matrix system
(KerrHawe)
Quickmat (Polydentia)
V-ring (TrioDent)
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Special matrix systems –
sectional matrix
Matrix is formed
Ring to fix
Forceps
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Special matrix systems –
sectional matrixV V3 V4
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Special matrix systems
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Special matrix systems – rings
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Special matrix systems –
forceps
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Special matrix systems – the use
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Thank you for your attention!67