8/4/2019 Dental Composites - Chemistry PPT

http://slidepdf.com/reader/full/dental-composites-chemistry-ppt 1/17

 

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.

8/4/2019 Dental Composites - Chemistry PPT

http://slidepdf.com/reader/full/dental-composites-chemistry-ppt 2/17

 

        2        0

  ,        0        0        0 1

        2        0  ,

        0        0        0

REVIEWRule-of-Mixtures

8/4/2019 Dental Composites - Chemistry PPT

http://slidepdf.com/reader/full/dental-composites-chemistry-ppt 3/17

 

REVIEWModified Rule-of-Mixtures

8/4/2019 Dental Composites - Chemistry PPT

http://slidepdf.com/reader/full/dental-composites-chemistry-ppt 4/17

 

REVIEWPolymer Classification Systems

8/4/2019 Dental Composites - Chemistry PPT

http://slidepdf.com/reader/full/dental-composites-chemistry-ppt 5/17

 

95-98% Conversion 55-65% Conversion

2X2X

REVIEWPolymerization and Properties of Key Monomers

8/4/2019 Dental Composites - Chemistry PPT

http://slidepdf.com/reader/full/dental-composites-chemistry-ppt 6/17

 

interface

interface

interface

interface

DISPERSED PHASE

Coupling Agent

CONTINUOUS PHASE

GENERALIZED VIEWComposite Restoration Structure

8/4/2019 Dental Composites - Chemistry PPT

http://slidepdf.com/reader/full/dental-composites-chemistry-ppt 7/17

 

AVERAGE COMPOSITIONAuto-Cured (Self-Cured) Composite

8/4/2019 Dental Composites - Chemistry PPT

http://slidepdf.com/reader/full/dental-composites-chemistry-ppt 8/17

 

CHEMISTRY OF COMPOSITESMatrix Phases

8/4/2019 Dental Composites - Chemistry PPT

http://slidepdf.com/reader/full/dental-composites-chemistry-ppt 9/17

 

CHEMISTRY OF COMPOSITESMatrix Phases (cont.)

8/4/2019 Dental Composites - Chemistry PPT

http://slidepdf.com/reader/full/dental-composites-chemistry-ppt 10/17

 

CHEMISTRY OF COMPOSITESMatrix Phases (cont.)

8/4/2019 Dental Composites - Chemistry PPT

http://slidepdf.com/reader/full/dental-composites-chemistry-ppt 11/17

 

CHEMISTRY OF COMPOSITESFiller Phases

8/4/2019 Dental Composites - Chemistry PPT

http://slidepdf.com/reader/full/dental-composites-chemistry-ppt 12/17

 

CHEMISTRY OF COMPOSITESFiller Phases (cont.)

8/4/2019 Dental Composites - Chemistry PPT

http://slidepdf.com/reader/full/dental-composites-chemistry-ppt 13/17

 

CHEMISTRY OF COMPOSITESInterfacial Coupling Agents

S1

8/4/2019 Dental Composites - Chemistry PPT

http://slidepdf.com/reader/full/dental-composites-chemistry-ppt 14/17

 

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.

8/4/2019 Dental Composites - Chemistry PPT

http://slidepdf.com/reader/full/dental-composites-chemistry-ppt 15/17

 

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

8/4/2019 Dental Composites - Chemistry PPT

http://slidepdf.com/reader/full/dental-composites-chemistry-ppt 16/17

 

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

8/4/2019 Dental Composites - Chemistry PPT

http://slidepdf.com/reader/full/dental-composites-chemistry-ppt 17/17

 

Thank

You