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Introduction to Dental Materials DHYG 113 Restorative Dentistry I.

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Presentation on theme: "Introduction to Dental Materials DHYG 113 Restorative Dentistry I."— Presentation transcript:

1 Introduction to Dental Materials DHYG 113 Restorative Dentistry I

2 Biomaterials Oral Tissues – Enamel – Dentin – Cementum – Pulp – Periodontium – Gingival Tissue

3 Objectives Discuss some of the conditions that make the oral cavity hostile to dental materials Identify ideal properties of dental materials Explain how dental materials, drugs, instruments and equipment are evaluated Summarize the reasons the dental hygienist should be knowledgeable about the science of dental materials Name and discuss classification categories

4 Replacement Materials Restriction on use: 1. Biting forces 2. Degradation of materials and teeth 3. Temperature changes 4. Biocompatibility 5. Esthetics

5 Characteristics of an Ideal Dental Material 1. Biocompatible 2. Mechanically Stable & Durable 3. Resistant to Corrosion or Chemicals 4. Dimensionally Stable 5. Minimally Conductive – thermal & electrical 6. Esthetic 7. Easy to Manipulate 8. Adherent to Tissues 9. Tasteless and Odorless 10. Cost-effective

6 History Ancient Times to the 1700’s – Gold, Ivory, Porcelain, Wax, Gypsum, Cements (Zinc phosphate & ZOE) During the 1800’s – Amalgam in use, Porcelain inlays & crowns The 20 th Century – New materials constantly developed – Variety of cast metals: gold, chromium & nickel, chromium & cobalt, and titanium – Polymers and Composites

7 Standards for Dental Materials Medical Device Amendment of 1976 – FDA considers dental materials as medical devices – FDA has authority to ensure safety of dental materials Council for Scientific Affairs of the ADA – ADA Seal of Acceptance

8 Classifications of Dental Materials by Use 1. Restorative Materials 2. Restorations & Crowns 3. Bridges 4. Complete & Partial Dentures 5. Impression Casts & Models 6. Cements 7. Temporary Materials 8. Preventive Materials 9. Polishing Materials 10. Implants 11. Specialty Materials

9 Classification by Location of Fabrication Direct Restorative Materials – Constructed directly in the oral cavity Amalgams, Composites, Glass ionomers Indirect Restorative Materials – Fabricated outside the oral cavity Gold crowns and inlays Ceramic materials Indirect restorative polymers

10 Classification by Longevity of Use Permanent Restorations – Don’t last forever, but give years of service

11 Longevity, con’t Temporary Restorations – Planned to be replaced in a short time Interim Restorations – Long term temporary restorations

12 Discussion What are some implications of dental hygiene practice on dental materials? Why do you think this might be important? What are your thoughts about hygienists doing restorative procedures? Is this something you would enjoy doing?


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