dental composites - chemistry ppt
TRANSCRIPT
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DENTAL COMPOSITESDENTAL COMPOSITESChemistry and DesignChemistry and Design
Stephen C. BayneStephen C. Bayne
Professor and Chair Professor and Chair Dept of Cariology, Rest Sciences, & EndoDept of Cariology, Rest Sciences, & EndoSchool of DentistrySchool of DentistryUniversity of MichiganUniversity of Michigan
Ann Arbor, MI 48109-1078Ann Arbor, MI 48109-1078
© 2006, Bayne and Thompson.
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REVIEWRule-of-Mixtures
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REVIEWModified Rule-of-Mixtures
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REVIEWPolymer Classification Systems
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95-98% Conversion 55-65% Conversion
2X2X
REVIEWPolymerization and Properties of Key Monomers
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interface
interface
interface
interface
DISPERSED PHASE
Coupling Agent
CONTINUOUS PHASE
GENERALIZED VIEWComposite Restoration Structure
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AVERAGE COMPOSITIONAuto-Cured (Self-Cured) Composite
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CHEMISTRY OF COMPOSITESMatrix Phases
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CHEMISTRY OF COMPOSITESMatrix Phases (cont.)
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CHEMISTRY OF COMPOSITESMatrix Phases (cont.)
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CHEMISTRY OF COMPOSITESFiller Phases
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CHEMISTRY OF COMPOSITESFiller Phases (cont.)
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CHEMISTRY OF COMPOSITESInterfacial Coupling Agents
S1
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SiOSiO22
in
Ceramic
S1
S1
S1
S1
S1
S1
S1
S1
S1
S1
S1
S1
B 1
B 2
T 1
T 2
B2 B1
T 1
T 2
B1B 2
T 1
T 2
B1B2
T 1
T 2
B 2 B 1
T 1
T 2
B1B 2
T 1
T 2 B 1 B 2
T 1
T 2
B 2
B 1
T 1T 2
B1B 2
T 2T1
B1 B2
T 2T1
B 1
B 2
T1 T2
S1S1
SILANESManaging the problems: (1) bonding, (2) multilayers, and (3) dimerization.
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DESIGNING COMPOSITESClass Exercise
COMPOSITE TYPE: Posterior
NAME = COM-POST
Components in Kit:>>>
>
COMPOSITE TYPE: Esthetic
NAME = COMP-EST
Components in Kit:>>>
>
ACTUAL COMPOSITION:
Matrix:> High MW Monomer => Low MW Diluent =
Curing System:> Initiator => Accelerator => Inhibitor =
Filler:> Particle Type 1 and Distro => Particle Type 1 and Distro => Total Filler Level => Coupling Agent: =
ACTUAL COMPOSITION:
Matrix:> High MW Monomer => Low MW Diluent =
Curing System:> Initiator => Accelerator => Inhibitor =
Filler:> Particle Type 1 and Distro => Particle Type 1 and Distro => Total Filler Level => Coupling Agent: =
CONTINUECONTINUE
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COMPOSITE TYPE: Posterior
NAME = COM-POST
Components in Kit:>>>
>
COMPOSITE TYPE: Esthetic
NAME = COMP-EST
Components in Kit:>>>
>
ACTUAL COMPOSITION:
Matrix:> High MW Monomer => Low MW Diluent =
Curing System:> Initiator => Accelerator => Inhibitor =
Filler:> Particle Type 1 and Distro => Particle Type 1 and Distro => Total Filler Level => Coupling Agent: =
ACTUAL COMPOSITION:
Matrix:> High MW Monomer => Low MW Diluent =
Curing System:> Initiator => Accelerator => Inhibitor =
Filler:> Particle Type 1 and Distro => Particle Type 1 and Distro => Total Filler Level => Coupling Agent: =
DESIGNING COMPOSITESClass Exercise
BIS-GMATEGDMA
CQ
NNDMPTBHT
70% Midi-Filler 30% Micro-Filler 75 wt%, 50vol%Silane
Directions; Shade GuideCompules of Composites(Bonding system)(Finishing system)
UDMATEGDMA
CQNNDMPTBHT
70% Mini-Filler 30% Micro-Filler 60 wt%, 40vol%Silane
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