Chapter 47 MDA short answer

Discuss the types of safety precautions that must be followed when working in the dental laboratory.

Laboratory rules, physical safety, chemical safety, and biohazards

List the types of equipment commonly found in a dental laboratory and describe their use.

- Heat sources Used to heat wax or other materials - Model Trimmer Used to trim stone or plaster models - Vacuum Former Used to construct custom trays for bleaching, mouth guards, and positioners for ortho. - Vibrator Used to remove air from the mix of plaster or stone and aid in the flow of material when a diagnostic model is poured - Laboratory Hand-piece Trimming custom impression trays, Adjusting dentures, and polishing provisional and indirect restorations - Sandblaster Creates etching or pitting on a surface area of metals, porcelain, or acrylic - Articular holds the max and mand. dental models in a position to aid in the reproduction of the mandible in relation to the maxilla - Face Bow used to determine the positional relationship of the two arches - Dental Lathe Used to trim and polish custom trays, provisional coverage, dentures, and indirect restorations

Define the dental model/cast and explain its use in dentistry.

3D reproductions of the teeth and surrounding soft tissues of the patients maxillary and mandibular arches. - used as a diagnostic tooth

Discuss gypsum products and their use in fabricating dental models.

Used to construct dental models

Describe the three types of custom impression trays and their use in dentistry.

quadrant trays- impressions of specific quadrant of mouth section trays- impressions of specific sections of the mouth full arch- impression of the maxillary or mandibular arches of the mouth

List the types of dental waxes and describe their use in dentistry.

rinsed, disinfected, wrapped in a moist paper towel, and placed in a precautionary bag