1. The influence of nano filling matterials on „shrinkage“ of dimethacrylate

2. Some useful words filling material shrinkage polydimethacrylate get hard or hardness transparent semi-solid inferior plnící materiál smrštění polydimethakrylát tvrdit čirý polotuhý nižší (kvality)

3. Properties high viscosity density: 1,2g/cm 3 transparent semi-solid

4. How can we prepair it?

6. Hardness with „light“ Initiator: CQ camphor quinone Inhibitor: DMAEMA 2-(N,N – dimethylamino) ethyl methacrylate Source of UV light Hardness with „heat“ Initiator: DBP dibenzoylperoxide Source of heat: drying kiln

7. Main problem about PDMA !!!SHRINKAGE!!! Because it is mainly used as dental resin for crowns and bridges. If we are making teeth and other dental denture, we are affraid of its shrinkage. Shrinkage can destroy denture, can cause several illnesses. Making and Using

8. Kinds of them PMMA Silicon dioxide Material with specific surface Why filling matterials shrinkage will be smaller resin will keep its shape

9. Volume vs. Strength getting higher volume can lead to inferior or lower strength As You can see on samples

10. Thanks so much for your time and attention Good bye