Dental Assisting Question and answers correctly solved 2024/2025
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Course
DENTURES,DX AND TX PLANNING
Institution
DENTURES,DX AND TX PLANNING
Dental Assisting Question and answers correctly solved 2024/2025 Dental Assisting - Chapter 47
Anatomic portion Impression - correct answer This portion of the impression is the STRUCTURAL portion of a dental model created from the alginate impression.
Articulator - correct answer Dental...
Dental Assisting - Chapter 47
Anatomic portion Impression - correct answer ✔This portion of the
impression is the STRUCTURAL portion of a dental model created from the
alginate impression.
Articulator - correct answer ✔Dental laboratory device that simulates
mandibular and temporomandibular joint movement when models of dental
arches are attached to it.
Crystallization - correct answer ✔Chemical process in which crystals form a
structure.
Die - correct answer ✔An accurate replica made of the prepared portion of a
tooth used in the laboratory during the fabrication of a cast restoration.
Dihydrae - correct answer ✔Related to gypsum products and indicating two
parts of water to one part of calcium sulfate.
Dimensionally stable - correct answer ✔Resistant to changes in width,
height, and length.
Face bow - correct answer ✔Portion of articulator used to measure the upper
teeth compared with the temporomandibular joint. Used by the dentist to
determine centric relation on a diagnostic model.
Gypsum - correct answer ✔Mineral used in the formation of plaster of Paris
and stone. It is the dehydrate form of calcium sulfate, which means it consists
of 2 parts water to every 1 part calcium sulfate.
, When heated, the water is removed and the material is converted into a
powdered hemihydrate which consists of 1/2 part water to 1 part calcium
sulfate.
For study models it comes as a hemihydrate in three forms: Model plaster,
dental stone, and high-strength stone.
When gypsum powder is mixed with water, the hemihydrate crystals dissolve
in the water to form clusters known as the nuclei of crystallization. These
nuclei are so close together that as the gypsum crystals expand during the
setting process, they intermesh and become entangled with each other
increasing strength, rigidity, and hardness of the final product.
Hemihydrate - correct answer ✔Removal of water to become one-half part
water to one part of calcium sulfate, forming the powder product of gypsum.
Homogenous - correct answer ✔Having a uniform quality and consistency
throughout.
Monomer - correct answer ✔A molecule that, when combined with other
molecules, forms a polymer.
Polymer - correct answer ✔A compound of many molecules.
Slurry - correct answer ✔A mixture of gypsum and water used in the finishing
of models.
Volatile - correct answer ✔Substance that can evaporate easily and is very
explosive.
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