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Direct Esthetic Materials

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1.What are the filler particles in Modern composites?

          Glass, Quartz, Lithium glass, Silica, Barium, Strontium

2. In modern composites inorganic filler is dispersed in what type of matrix?

          Liquid Resin

3. Microfilled or macrofilled composites wear away faster?

          Microfilled because they have less filler.

4. Macrofilled is 50-60% filler by volume and .5-5 microns in diameter.

5.Which type of composite has the most filler content?

          Blends or hybrids. 70% filler by volume

6. What composite is highly polishable?

          Microfilled

7. The % by volume of filler in microfilled composites?

          35-50%

8.What is the particle size in microfilled composites?

          .04-.2 microns

9. What makes composites RO?

          Barium, Strontium

10. What are fillers coated with that helps them bond to resin matrix?

          Coupling agent

11. What is the function of the coupling agent?

          Reinforces the matrix.

12. What is the most common coupling agent?

        Silane

13. The liquid organic resin matrix of composites is known as:

          Dimetharcylates or BIS-GMA

14.The process by which a resin is set is:

          Polymerization

15. Polymerization consists of taking monomers and making into polymers. True/ False

16. Chemical activated polymerization:

          Mix 2 pastes. Very old method, porosity from air.

17. Light activated polymerization:

          Monomer + initiator+ filler= polymer What are the actual things?

          Dimetharcylate or BIS-GMA + blue light & diketones +filler = composite.

18.Why do microfilled composites have more polymerization shrinkage?

          Because microfilled have less filler.

True/ False

19. Composites do not have the same thermal Conductivity as teeth. False

20.The composite with least filler has mre dimensional change. True

21. Composite with little filler takes up less resin matrix. False

22. Increase in filler decreases strength. False

23. Decrease filler decrease in hardness. True

24. What is the bond strength of composites?

          Bond 2 times more readily to enamel. 

25.What type of bond do composites and sealants have to tooth?

          Mechanical Bond

26. What is the mechanical bond of composites and sealants to tooth?

          The tooth is etched (acid is applied to create pores in the enamel)

27.What type of bulb is used in light cured composites and sealants?

          Quartz halogen

28.Outer surface of a composite or sealants that must be removed before the pt leaves?

          Oxygen (air) inhibited layer

29.Glass Ionomers liquid: acrylic acid glass

30. Glass Ionomers powder: aluminosilcate, fluoride

31. Glass Ionomers are anticariogenic because: They contain fluoride

32. What class restoration are glass Ionomers used in?

          Class 5 restorations. Can also be used as cement.

33. How do glass ionomers react with the pulp?

          They are kind to the pulp

Disclaimer: These notes were copied and pasted from files sent to me by Andrea.  They have not been reviewed for errors. You are responsible for checking out the information to verify the accuracy. This site, Amy Nieves and Andrea are not responsible for typographical errors.