Card Set Information
Where woould the dental laboratory be located in a dental office?
In a separate area of the dental office (away from the patient treatment room)
What specialty practices might have a more extensive laboratory setup?
What is an example of a contaminated item in the dental laboratory?
Anuthing brought into the laboratory from the treatment room area (impressions)
What is required in the laboratory to heat wax or other materials?
heat source (propane or butane)
What is used to trim stone or plaster model?
What piece of equipment is used to grind away plaster or stone?
What piece of equipment does the dentist use to determine centric relation on a diagnostic model?
What is the most common wax spatula size used in the laboratory?
#7 wax spatula
Which appliance is used to construct custom trays for bleaching, mouth guards and positioners for orthodontics?
What is used to remove air from the mix of plaster or stone and to aid in the flow of material when diagnostic model is poured up?
What is used for many tasks, such as trimming custom impressions trays, adjusting dentures and polishing provisional and inderect restorations?
low-speed laboratory handpiece
A handheld unit that sprays sand at a high rate of speed, creating etching or pitting on surface area of metals, porcelain, or acrylic?
What mechanical device is used to hold maxillary and mandibular dental models in a position to aid in reproduction of the mandible in relation to the maxilla?
A machine used for cutting or polishing dental appliances?
Structural portion of a dental model created from the alginate impression?
Chemical process in which crystals form a structure?
An accurate replica of the prepared portion of the ttoth used in the laboratory during the fabrication of a cast restoration?
Related to gypsum products and indicating two parts of water to one part of calcium sulfate?
Resistance to changes in width, height and lenght?
Mineral used in the formation of plaster of Paris and Stone?
Removal of water to become one-half part water to one part of calcium sulfate, forming the powder product of Gypsum?
Machine used for cutting or polishing dental appliances?
Replica of the maxillary and mandibular arches made from an impression?
A molecule that, when combined with other molecules, forms a polymer?
Compound of many molecules?
mixture of gypsum and water used in the finishing of models?
Substance that can evaporate easily and is very explosive?
Double ended instrument used in waxing a pattern, or when working with wax for a partial or full denture?
Used for mixing of alginate in the teratment area and for mixing of stone or plaster in the laboratory?
Flexible rubber bowl
What is another term for a dental model?
What dental materials are used to make dental models?
What are the 3 forms of gypsum?
What is the water-to-powder ration of plaster?
100g to 45-50ml of water
When mixing gypsum materials what do you add 1st?
powder to water
In what are gypsum materials mixed?
Flexible rubber bowl
Accurate three-dimensional reproduction of the teeth and sorrounding soft tissues of the patients maxillary and mandibular arches?
What is used to create a dental model?
What are Dental models used for?
Diagnosis for planning a fixed or removable prosthetic device
Diagnosis of orthodontic treatment
Visual presentation of dental treatment
What are the differences b/w the 3 gypsum products?
size, shape and porosity of the hemihydrate crystals
What is a Model plaster commonly refered to?
Plaster of Paris
What gypsum product requires the greatest quantity of water and is the weakest form of study models?
For of gypsum usually yellow used when a more durable diagnostic cast is required?
High strenght stone is also known as?
densite or improved dental stone
Gypsum that make it ideal for creating DIE for use of fabrication of wax pattern with the production of wax, bridges, and indirect restorations?
What has a significant effect on the setting time abd strenght of the gypsum product?
When too little water is used, the mix will dry and provides?
shorter working time
When too much water is used, the mix will be thin and runny?
takes longer to set
What is used to measure the water?
What is used to measure powder?
What are the 2 parts of the dental model?
When pouring and impression, where in the maxillary impression do you begin to place the gypsum material?
near the most posterior teeth
How long should you wait before you separate the model from the impression?
Which of the 2 models do you begin measuring and trimming 1st?
What area on the maxillary and mandibular model is trimmed differently?
the anterior cut
What should be placed b/w the 2 models when one is trimming them together?
What is the most common way of "pouring up" impressions?
What portion is made up by the anatomical portion?
What portion does the Art portion take from cast?
What are the primary materials used to construct custom trays?
self-curing acrylic resin
Of the 3 types of custom trays discussed, which technique uses a more hazardous material in the fabrication of the tray?
Self-curing acrylic resin (liquid monomer)
Which type of custom tray is made for a vital bleaching procedure?
Vacuum-formed thermoplastic resin
In which two forms is acrylic resin supplied?
What is the pusrpose of a spacer?
Placed on the cast to create room in the tray for the impression material
How are undercuts corrected on a model whena custom tray is prepared?
Fill them with wax or other molding material
What is used to extend the borders of an impression tray?
Laboratory technicians uses this wax to create a pattern of the inderect restoration on a model?
inlay casting wax
used for single-tooth inderect restorations and fixed bridges and for casting metal portions of a partial denture?
What type of wax could be used to form a wall around a preliminary impression when pouring it up?
What type of wax would you use to obtain a patients bite impression?
Bire registration wax
What is the most common wax used to create a pattern for an inderect restoration?
Inlay casting Wax