1. Revision on Practical Dental Materials
RDM211
DENTAL BIOMATERIALS
Revision on Practical Dental Materials

2. Mechanical properties

3. DIAMETRAL TENSILE STRENGTH TEST

4. THREE POINT BENDING (TRANSVERSE STRENGTH TEST

5. Testing compressive strength of a material:
Specimen shape: Cylindrical
Type of force used: compression
Tester: Universal Testing Machine

6. Dumbell shaped specimen

7. Disc shaped specimen for diametral TS

8. Diametral compression test of brittle materials:
Specimen shape: Disk-shaped
Type of force applied: Compression
Resultant force: Tension
Tester: Universal Testing Machine
Stress = P Load
π D T
Diameter XThickness

9. Hardness testers

10. STOCK TRAYS

11. Acrylic special tray

12. 1-Impression materials

13. Impression compound low fusing sheets and sticks(green) compound)

14. 1) An impression compound disc
2) An impression compound impression taken in an upper edentulous stock tray

15. LOW FUSING COMPOUND (GREEN COMPOUND).

16. ZINC OXIDE EUGENOL IMPRESSION PASTE

17. Glass slab and spatula

18. ZINC OXIDE EUGENOL SECONDRY IMPRESSION

19. ACRYLIC SPECIAL TRAY WITH BORDER MOULDED (USING LOW FUSING COMPOUND) READY FOR MAKING ZOE IMPRESSION

21. PRIMARY COMPOUND IMPRESSION

22. INPRESSION COMPOUND SHEETS

23. Agar syringe and tray material
Syringes: low viscosity – high flow.
Tubes: high viscosity – heavy body: low flow.

24. AGAR-AGAR CONDITIONER

25. Three compartments conditioning bath

26. Water cooling system tray for agar impression

27. Alginate

28. Rubber bowl and broad bladed spatula

29. Alginate impression

30. polysulphide

31. Mixing on paper pad or glass slab with medium blade spatula.

32. Manipulation
Kneading

33. Addition silicone How many consistency

34. Latex gloves
Vinyl gloves

35. Condensation silicone

36. Inaccuracy (shrinkage) Poured as soon as possible
Condensation silicon
By-product
ethyl alcohol
Inaccuracy (shrinkage)
Poured as soon as possible
Need very dry field (hydrophobic)
Advantages:
Clean, pleasant odour
Addition silicon:
No byproduct
Release H2 gas after setting
Delayed pouring
Hydrophobic
Advantages:
Good dimensional stability

37. Tray adhesive

38. Auto mixing gun and cartridges
Static mixing tips

39. Rubber base impression
Heavy
body
Light body

40. 2- Gypsum materials

41. STONE CAST

43. Die

44. Rubber bowl and spatula
Vacum mixing machine
Semi mechanical mixer