Prateek Mathur Student 2nd year B.D.S Manipal college of dental sciences.

3. Prateek Mathur

5. Typical values: All values in MPa Type of amalgam alloy Compressive (1hr) Strength (7 days) Tensile strength Low copper amalgam 145 300 60 High copper admix 137 430 48 High copper unicompositional 262 500 62

7. Factors affecting Strength :

10. Repair strength of dental amalgams . Shen C, Speigel J, Mjör IA. (Department of Dental Biomaterials, College of Dentistry, Health Science Center, University of Florida, Gainesville, FL 32610-0446, USA.

13. Influence of microstructure on creep:

14. Manipulative variables:

16. Creep values at different magnitudes of applied dynamic stresses

17. Creep values for different amalgam types at a fixed dynamic stress

18. Amalgam creep tester:

20. Thank you…