DEN 135- CH 47

These flashcards cover key concepts related to laboratory equipment, safety procedures, uses of dental models, gypsum products, and various types of dental waxes.

What is the main purpose of the dental laboratory?

Procedures that take place away from the patient treatment area.

What are some common uses of the dental laboratory?

Making models, preparing custom trays, polishing, provisional coverage, and indirect restorations.

What safety precautions must be followed in the dental laboratory?

No eating or drinking, wearing personal protective equipment, and reporting all accidents.

What are the three basic types of custom impression trays?

Tray must be rigid, fit and adapt well to the arch, and maintain an even distribution of impression material.

Define gypsum products in the context of dental models.

Used extensively in dentistry to make dental models and are characterized by their mineral composition and properties.

What is the significance of powder-to-water ratios in gypsum products?

Significant effect on the setting time and strength of the gypsum product; must be accurately measured.

What are the physical forms of gypsum used in dental models?

Impression Plaster (Type I), Model Plaster (Type II), Dental Stone (Type III), Die Stone (Type IV), High Strength Stone (Type V).

What is the purpose of a separating medium in custom impression trays?

To ensure the completed tray can be readily separated from the cast.

What materials are used to construct custom impression trays?

Self-curing acrylic resin, light-cured resin, and thermoplastic material.

What are the classifications of dental waxes?

Pattern waxes, processing waxes, and impression waxes.