In materials engineering, bio materials include dental materials. here are some dental materials with drawbacks, properties and applications.

2. Presented by:
Khushbakhat Nida MME-13-25
Maria Iqbal MME-13-26
Nishat Riaz MME-13-27
Institute of Advanced Materials, BZU, Multan

3. Dental Materials

4. What is Dental Material?
 Dental materials are specially fabricated
materials, designed for use in dentistry.
 The main goal in dentistry is to maintain or
improve the quality of life through
replacement or alteration of tooth structure.

5. Characteristics of Dental Material
 Biocompatible
 Bond permanently to tooth structure
 Aesthetic appearance
 Properties similar to those of tooth tissues

6. Classification:
 Amalgams
 Composite resins
 Ceramic-resin hybrid
 Glass ionomers

7. Amalgams:
Metallic filling material composed of:
Mercury (43% to 54%)
Alloy powder (57% to 46%)
 Silver
 Tin
 Copper
 Zinc
•Requires cements for adherence

8. Properties:
 Strength
 Durable
 Hardness
 Toughness
 Wear resistance
 Biocompatible
 Cost effectiveness

9. Drawbacks:
 Unnatural appearance
 Toxicity of mercury
 Corrosion/ tarnish

10. Composite resins:
 White fillings
 Mixture of powdered glass and plastic resin
 Resemble the appearance of the natural
tooth

11. Properties:
 Harden with light exposure
 Bonding with tooth structure
 Strength and toughness
 Corrosion resistant
 Wear resistant

12. Advantages:
 Cosmetically superior to amalgam fillings
 Used to fill carious lesion

13. Drawbacks:
 BPA containing resins Causes cancer
 Affected by moisture contamination
 Shrinkage upon curing
 Amalgam last up to 20% longer than similar
composite restoration

14. Ceramic-resin hybrids:
 Nano ceramic particles embedded in a resin
matrix
 Combines the properties of composite and
ceramic
 Widely used in dentistry because of chemical
durability and biocompatibility

15. Properties:
Less brittle
Shock absorbing
Wear resistant
Hard
Abrasion resistant
High fracture toughness
Strength

16. Glass Ionomers:
 Mixture of glass and organic acid
 Initially used to replace the lost osseous
tissues in human body
 No need of bonding agents

17. Properties:
 Tooth-colored but aesthetic potential inferior
than composite resins
 Biocompatible to dental pulp
 No shrinkage
 No micro-leakage
 Release fluoride
 Good hardness
 Abrasion and wear resistant

18. Drawbacks:
 Low strength
 Low toughness

19. Applications of dental materials:
Temporary dressing
Dental restoration

20.  Dental implants
 Impression materials

21. The End!
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