MDA Chapter 47 Questions with complete solution 2024/2025
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Course
DENTURES,DX AND TX PLANNING
Institution
DENTURES,DX AND TX PLANNING
MDA Chapter 47 Questions with complete solution 2024/2025 MDA Chapter 47 & 51
A replica of the max/mand arches made from an impression - correct answer Model
Define lathe - correct answer A machine used for cutting or polishing dental appliances
Define dimensionally stable - correct a...
MDA Chapter 47 & 51
A replica of the max/mand arches made from an impression - correct answer
✔Model
Define lathe - correct answer ✔A machine used for cutting or polishing
dental appliances
Define dimensionally stable - correct answer ✔Resistant to changes in width,
height & length
Define volatile - correct answer ✔A substance that can evaporate easily & is
very explosive
Having uniform quality and consistency throughout - correct answer
✔Homogenous
Mineral used in the formation of plaster, paris and stone - correct answer
✔Gypsum
Define articulator - correct answer ✔Dental lab device that stimulates the
movement of the mand & temporomandibular joint when the models of the
arches are attached to it
Define crystalization - correct answer ✔Chemical process in which crystals
form a structure
A mixture of gypsum and water used in the finishing of models - correct
answer ✔Slurry
,A molecule that when combined with other molecules forms a polymer -
correct answer ✔Monomer
Portion of an articulator used to measure the upper teeth as compared to the
temporomandibular joint - correct answer ✔Face bow
Define polymer - correct answer ✔A compound of many molecules
An accurate replica of the prepared portion of a tooth used in the lab during
the fabrication of a cast restoration - correct answer ✔Die
Removal of water to become 1/2pt water: 1pt calcium sulfate forming the
powder project of gypsum - correct answer ✔Hemihydrate
Define anatomic portion - correct answer ✔The structural portion of a dental
model created from the impression (teeth and surrounding tissues)
Define art - correct answer ✔Everything other than the anatomic portion of
the model
What are the safety precautions that should be taken in the dental lab -
correct answer ✔No eating, drinking or smoking in the lab
Wear proper PPE
Keep hair pulled back
Keep all cosmetics out of area
, Clean work area before and after use
Report all accident to the dentist immediately
Follow the manufactures instructions for equipment operation
Where would the dental lab be located in a dental office - correct answer ✔In
a separate area of the dental office, away from the treatment area
How can we maintain physical and chemical safety in the dental office -
correct answer ✔Physical- Know where the fire extinguishers are located
and know all fire escape routes
Chemical- take care in handleing corrosive, toxic and carcinogenic
substances
What are biohazards - correct answer ✔Items brought intro the lab can
harbour blood/ saliva that can be infective
What are the uses of the dental lab - correct answer ✔Making models
Trimming + finishing diagnostic models
Preparing custom trays
Polishing- provisional coverage, partial/full dentures, indirect restorations
What specialty practices might have a more extensive lab setup - correct
answer ✔Pediatrics, prosthodontics and orthodontics all will have a more
extensive lab setup because they have more lab work to complete
What is an example of a contaminated item or biohazard in the dental lab -
correct answer ✔Impressions
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