Chapter
18
Objectives
Dental Laboratory Materials
Upon completion of this chapter, the reader should be able to identify and understand terms related to the following: 1. Impression materials. Identify the various kinds of rigid and elastic impression materials, and give examples of each. 2. Gypsum materials. Discuss the assorted types of gypsum products used in dentistry, and give examples of their uses. 3. Wax materials. Identify the different kinds of dental waxes, and discuss a use for each type of wax. 4. Dental polymer materials. Explain the process of polymerization and the factors that alter or modify the chemical reaction, as well as the uses for the polymer materials. 5. Precious and base metals. Describe the difference between precious and other metals, and state uses for the assorted types of gold. 6. Abrasive and polishing materials. Identify the common abrasives and polishing materials used in dentistry and the desired effect of each. 7. Cement materials. List the various types of dental cements, and state the uses for each type. 8. Characteristics of dental laboratory materials. Discuss the different types of descriptive or manipulative characteristics of dental materials.
Impression Materials Dental laboratory procedures involve a variety of procedural steps or techniques and the use of many materials. These materials may be grouped into families according to composition or use. Each material exhibits its own particular characteristic, and one substance may differ from another even
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