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MDA Chapter 47 Questions with complete solution 2024/2025 $13.49
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MDA Chapter 47 Questions with complete solution 2024/2025
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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...

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  • September 17, 2024
  • 30
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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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


Define dihydrate - correct answer ✔Indicating 2pt water: 1pt calcium sulfate


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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