DES 2100 FINAL EVALUATION EXAM QUESTIONS WITH
SOLUTIONS 2025 GRADED A+
✔✔can be harmful to both dental professionals and the environment. following the ADA
guidelines for proper storage, handling and clean up of this material is important for the
protection of both dental professionals and the environment - ✔✔mercury
✔✔how are dental materials classified? - ✔✔- by use
- by location of fabrication
✔✔the process for mixing dental amalgam - ✔✔trituration or amalgamation
✔✔the cervical 1/3 of both anterior and posterior teeth - ✔✔class V
✔✔- a set of standards and guidelines
- voluntary
- awarded for 3 years - ✔✔ADA seal of acceptance
✔✔typically not for caries, however it is a restorative classification. including incisal
edges of anterior teeth and cusp tips of posterior teeth - ✔✔class VI
✔✔this type of cement contains Polyacrylic acid and mixes with zinc oxide -
✔✔polycarboxylate
✔✔the use of bonding in dentistry does these 3 functions - ✔✔- retention of restoration
- reduction of microleakage
- reduction of recurrent caries
✔✔they are a unque group of materials in that both a maximum and a minimum
strength are required - ✔✔temporary cement
(must be strong enough to hold, but not so strong that they cannot be removed)
✔✔under the Medical Device Amendments of 1976, the FDA considers dental materials
to be medical devices. it classifies them into 3 categories to ensure safety. which
classification is the least restrictive? - ✔✔class I - like prophy paste
✔✔the first successful technique for bonding dental materials to a tooth by creating a
microscopically rough surface - ✔✔acid etching
✔✔what is used as an etchant? - ✔✔Orthophosphoric acid 37%
, ✔✔you want to take an impression of the prepared tooth, a bite registration, and an
impression of the opposite arch all at the same time. what type of tray are you using? -
✔✔triple tray
✔✔this stress occurs when parts of an object slide past each other (like incisors) -
✔✔shear
✔✔the seepage of harmful products, such as bacteria, into the interface between a
restoration and the tooth - ✔✔microleakage
✔✔a pulling stress - ✔✔tension
✔✔the tendency of a material to dissolve in a fluid - ✔✔solubility
✔✔which impression material is known for being inexpensive and easy to use but it is
not stable over a long term? - ✔✔alginate
✔✔what is gypsum POWDER? - ✔✔Calcium sulfate HEMIhydrate
✔✔- a temperature dependent property
- measured in grams/meter-second
- the measure of a product's ability to flow - ✔✔viscosity
✔✔bending is a combination of which two stresses? - ✔✔tension and compression
✔✔name two hydrocolloids
- what is the main difference between the two? - ✔✔- alginate - irreversible, LESS
accurate
- agar - reversible, needs special equipment; VERY accurate
✔✔how do you fill an impression tray with gypsum? what special tool is needed and
why? - ✔✔let it flow ahead of itself using a dental vibrator to prevent trapping air
✔✔give an example of each:
- inelastic
- aqueous elastomeric
- non-aqueous elastomeric - ✔✔- wax/impression compound - ZOE - plaster
- alginate - agar
- polysulfides - condensation silicones - polyethers - addition silicones
✔✔discoloration from the oxidation of a thin surface layer of a metal - ✔✔tarnish
SOLUTIONS 2025 GRADED A+
✔✔can be harmful to both dental professionals and the environment. following the ADA
guidelines for proper storage, handling and clean up of this material is important for the
protection of both dental professionals and the environment - ✔✔mercury
✔✔how are dental materials classified? - ✔✔- by use
- by location of fabrication
✔✔the process for mixing dental amalgam - ✔✔trituration or amalgamation
✔✔the cervical 1/3 of both anterior and posterior teeth - ✔✔class V
✔✔- a set of standards and guidelines
- voluntary
- awarded for 3 years - ✔✔ADA seal of acceptance
✔✔typically not for caries, however it is a restorative classification. including incisal
edges of anterior teeth and cusp tips of posterior teeth - ✔✔class VI
✔✔this type of cement contains Polyacrylic acid and mixes with zinc oxide -
✔✔polycarboxylate
✔✔the use of bonding in dentistry does these 3 functions - ✔✔- retention of restoration
- reduction of microleakage
- reduction of recurrent caries
✔✔they are a unque group of materials in that both a maximum and a minimum
strength are required - ✔✔temporary cement
(must be strong enough to hold, but not so strong that they cannot be removed)
✔✔under the Medical Device Amendments of 1976, the FDA considers dental materials
to be medical devices. it classifies them into 3 categories to ensure safety. which
classification is the least restrictive? - ✔✔class I - like prophy paste
✔✔the first successful technique for bonding dental materials to a tooth by creating a
microscopically rough surface - ✔✔acid etching
✔✔what is used as an etchant? - ✔✔Orthophosphoric acid 37%
, ✔✔you want to take an impression of the prepared tooth, a bite registration, and an
impression of the opposite arch all at the same time. what type of tray are you using? -
✔✔triple tray
✔✔this stress occurs when parts of an object slide past each other (like incisors) -
✔✔shear
✔✔the seepage of harmful products, such as bacteria, into the interface between a
restoration and the tooth - ✔✔microleakage
✔✔a pulling stress - ✔✔tension
✔✔the tendency of a material to dissolve in a fluid - ✔✔solubility
✔✔which impression material is known for being inexpensive and easy to use but it is
not stable over a long term? - ✔✔alginate
✔✔what is gypsum POWDER? - ✔✔Calcium sulfate HEMIhydrate
✔✔- a temperature dependent property
- measured in grams/meter-second
- the measure of a product's ability to flow - ✔✔viscosity
✔✔bending is a combination of which two stresses? - ✔✔tension and compression
✔✔name two hydrocolloids
- what is the main difference between the two? - ✔✔- alginate - irreversible, LESS
accurate
- agar - reversible, needs special equipment; VERY accurate
✔✔how do you fill an impression tray with gypsum? what special tool is needed and
why? - ✔✔let it flow ahead of itself using a dental vibrator to prevent trapping air
✔✔give an example of each:
- inelastic
- aqueous elastomeric
- non-aqueous elastomeric - ✔✔- wax/impression compound - ZOE - plaster
- alginate - agar
- polysulfides - condensation silicones - polyethers - addition silicones
✔✔discoloration from the oxidation of a thin surface layer of a metal - ✔✔tarnish
