CHAPTER 47: Laboratory Materials and Procedures Flashcards
A heat source is required in the laboratory to heat wax or other materials. A ____ or _____is used for this purpose.
propane
butane torch
a machine used to trim stone or plaster models
model trimmer
a small electrical appliance used to construct custom trays for bleaching, mouth guards, and positioners for orthodontics
vaccum former
used to remove air from the mix of plaster or stone and to aid in the flow of material when a diagnostic model is poured
vibrator
is used for many tasks, such as trimming custom impression trays, adjusting dentures, and polishing provisional and indirect restorations.
low-speed laboratory handpiece
a handheld unit that sprays sand at a high rate of speed, creating an etching or pitting on a surface area of metals, porcelain, or acrylic
sandblaster
sandbasting is suitable for what procedures?
repair of crowns
dentures
cementation of crown
bridges and inlays
is a mechanical device used in dentistry to hold the maxillary and mandibular dental
models in a position to aid in reproduction of the mandible in relation to the maxilla
articulator
what does the articulator fabricate ?
dentures
crowns
bridges
inlays, and onlays
orthodontic appliances
the first step the dentist takes to determine the positional relationship of the maxillary arch to the temporomandibular joints.
the face bow
a measurement of where the teeth are positioned when the joints are aligned correctly and before the teeth come in contact.
centric relation or bite record,
is used to trim and polish custom trays, provisional coverage, dentures, and indirect restorations.
dental lathe
spatula that is used most often in the laboratory
7 wax spatula
used for mixing of alginate in the treatment area and for mixing of stone or plaster in the laboratory setting.
rubber bowls
dental models are also reffered to as :
study casts
When gypsum is heated during the manufacturing process, the water is removed, and the gypsum is converted into a powdered
________
hemihydrate
gypsum is the
_______form of calcium sulfate, which means it consists of 2 parts water to every 1 part calcium sulfate.
dihydrate
the five types of gypsum
-impression plaster type I & II
-dental stone (type III)
-Die stone (type IV)
- high strength stone ( type V)