MDA Chapter 47 Laboratory Materials and Procedures Question and answers correctly solved 2024/2025
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Course
DENTURES,DX AND TX PLANNING
Institution
DENTURES,DX AND TX PLANNING
MDA Chapter 47 Laboratory Materials and Procedures Question and answers correctly solved 2024/2025 MDA Chapter 47 Laboratory Materials and Procedures
safety precautions that should be taken in the dental laboratory - correct answer 1. no eating, drinking, or smoking permitted
2. keep all cosm...
MDA Chapter 47 Laboratory Materials
and Procedures
safety precautions that should be taken in the dental laboratory - correct
answer ✔1. no eating, drinking, or smoking permitted
2. keep all cosmetics away from the area
3. wear personal protective equipment
4. keep hair pulled back
5. report all accidents to the dentist immediately
6. follow the manufacturer's instructions for equipment operation
7. clean the work area before/after every procedure
where would the dental laboratory be located in a dental office? - correct
answer ✔separate area of the dental office, away from the patient treatment
area
what specialty practices might have a more extensive laboratory set up? -
correct answer ✔Specialty practices, such as pediatric dentistry,
orthodontics, and fixed and removable postorthodontics will have a more
extensive laboratory because they have more lab work to complete.
what is an example of a contaminated item in the dental laboratory? - correct
answer ✔impressions and other items brought into the lab can harbor blood
or saliva that could be infectious. therefore, the lab area and the contaminated
items must be disinfected before and after each use
what are wall-mounted bins used for? - correct answer ✔to store bulk
supplies of plaster, stone, and investment material. they protect materials from
moisture contamination and make it easy to remove gypsum products as
needed.
,What are work pans? - correct answer ✔open plastic containers with
identification labels used to hold the laboratory work in progress for an
individual patient
why might the work pans be color coded - correct answer ✔to indicate the
type of procedure to be performed
why is a heat source required in the dental lab? - correct answer ✔required
in the lab to heat wax or other materials
What can we us to heat the wax? - correct answer ✔A propane or butane
torch can be used to heat wax or other materials
when can we use the Bunsen burner? - correct answer ✔If a gas line has
been installed in the laboratory, rubber hosing will be attached to a Bunsen
burner and then to the gas outlet.
why is it important to fully turn the gas on or off? - correct answer ✔any loose
turn can let gas escape
what is a model trimmer? - correct answer ✔machine that is used to trim
stone or plaster models that has an abrasive grinding wheel, gentle water
stream is used to control dust and facilitate cutting, also has a plaster trap
what is a vacuum former? - correct answer ✔a small electric appliance used
to construct custom trays for bleaching, mouth guards, and positioners for
orthodontics
, how does a vacuum former work? - correct answer ✔the upper part of the
unit is a heating element that warms and softens a sheet of thermoplastic
resin. the work surface has holes that allow the vacuum to pull and shape the
warmed plastic around the model
what is a vibrator used for? - correct answer ✔to remove air from the mix of
plaster or stone and to aid in the flow of material when a diagnostic model is
pored up, it has a flat working surface and uses a disposable cover
What handpiece is required in the dental laboratory? - correct answer ✔a low
speed laboratory handpiece is used for many tasks, such as:
trimming custom impression trays
adjusting dentures
and polishing provisional and indirect restorations
what is a sandblaster? - correct answer ✔a hand held unit that sprays sand
at a high rate of speed, creating an etching or pitting on a surface area of
metals, porcelain, or acrylic
used for the repair of crowns, dentures, and appliances
used for cementation of crowns, bridges, and inlays
what is an articulator used for? - correct answer ✔a mechanical device used
in dentistry to hold maxillary and mandibular dental models in a position to aid
in reproduction of the mandible in relation to the maxilla
allows dentist and lab tech to fabricate removable prosthodontic appliances
and fix prosth. restorations (crowns, bridges, in/onlays, and orthodontic
appliances)
what does the articulator allow the dentist or lab tech to do? - correct answer
✔to fabricate removable dentures fix bridges, crowns, inlays and onlays.
(prosthodontics)
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