Podcast
Questions and Answers
An EFDA (Expanded Functions Dental Assistant) is legally permitted to take which type of impression?
An EFDA (Expanded Functions Dental Assistant) is legally permitted to take which type of impression?
- Final impressions for crown and bridge procedures only.
- Preliminary impressions for study models and bite registrations. (correct)
- Impressions for the fabrication of complex orthodontic appliances.
- Impressions exclusively for removable prosthodontic frameworks.
What is the primary clinical purpose of a bite registration impression?
What is the primary clinical purpose of a bite registration impression?
- To create a custom impression tray for improved material distribution.
- To fabricate a diagnostic cast for treatment planning.
- To capture the detailed anatomy required for crown margin adaptation.
- To accurately record the occlusal relationship between the maxillary and mandibular arches. (correct)
Which type of impression tray is designed to provide the most accurate fit, conforming to the unique contours of a patient's dental arch?
Which type of impression tray is designed to provide the most accurate fit, conforming to the unique contours of a patient's dental arch?
- A perforated tray with holes for material retention.
- A stock tray selected based on arch size. (correct)
- A custom tray fabricated on a model of the patient's arch.
- A quadrant tray covering a section of the arch.
What is the generally recommended water-to-powder ratio when mixing alginate for a maxillary impression?
What is the generally recommended water-to-powder ratio when mixing alginate for a maxillary impression?
What is the primary organic component responsible for the gelling properties and flexibility of hydrocolloid impression materials?
What is the primary organic component responsible for the gelling properties and flexibility of hydrocolloid impression materials?
Which of the following impression materials is generally considered the most dimensionally stable and is often selected for definitive impressions?
Which of the following impression materials is generally considered the most dimensionally stable and is often selected for definitive impressions?
Which of the formulations are NOT commonly used for elastomeric impression materials?
Which of the formulations are NOT commonly used for elastomeric impression materials?
Which type of impression tray would be MOST suitable for a situation needing to capture only teeth 24-27 for a crown?
Which type of impression tray would be MOST suitable for a situation needing to capture only teeth 24-27 for a crown?
When might a dentist choose fast-set alginate over regular-set alginate?
When might a dentist choose fast-set alginate over regular-set alginate?
What is the normal-set working and setting time for alginate?
What is the normal-set working and setting time for alginate?
Why is it important for a dental laboratory to be separate from patient treatment areas?
Why is it important for a dental laboratory to be separate from patient treatment areas?
Why would an orthodontic practice generally require a more extensive dental laboratory setup compared to other specialties?
Why would an orthodontic practice generally require a more extensive dental laboratory setup compared to other specialties?
When using a facebow to help orient a diagnostic model, what is its primary purpose in relation to centric relation?
When using a facebow to help orient a diagnostic model, what is its primary purpose in relation to centric relation?
Which property of gypsum products makes them particularly suitable for creating dental models?
Which property of gypsum products makes them particularly suitable for creating dental models?
What happens if the water-to-powder ratio is too high when mixing plaster?
What happens if the water-to-powder ratio is too high when mixing plaster?
Why is it important to add the powder to the water when mixing gypsum materials, rather than the other way around?
Why is it important to add the powder to the water when mixing gypsum materials, rather than the other way around?
Why is the waiting period after pouring an impression important before separating the model?
Why is the waiting period after pouring an impression important before separating the model?
Why is the maxillary model typically trimmed first when creating dental models?
Why is the maxillary model typically trimmed first when creating dental models?
What is the purpose of using thermoplastic resin to create a custom tray with a vacuum former?
What is the purpose of using thermoplastic resin to create a custom tray with a vacuum former?
What is the functional purpose of using utility wax on an impression tray?
What is the functional purpose of using utility wax on an impression tray?
What are two things that make taking an alginate impression different on an edentulous patient than other alginate impressions?
What are two things that make taking an alginate impression different on an edentulous patient than other alginate impressions?
Flashcards
EFDA legal impression
EFDA legal impression
Preliminary impressions and bite registrations
Bite registration use
Bite registration use
Recording the way teeth come together.
Custom tray
Custom tray
Specifically made to perfectly fit a patient's mouth.
Alginate maxillary impression ratio
Alginate maxillary impression ratio
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Hydrocolloid organic substance
Hydrocolloid organic substance
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Light-bodied material tool
Light-bodied material tool
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Material for final impressions
Material for final impressions
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Elastomeric materials form
Elastomeric materials form
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Half dental arch tray
Half dental arch tray
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Fast set alginate reason
Fast set alginate reason
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Dental laboratory location
Dental laboratory location
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Specialty with extensive lab setup
Specialty with extensive lab setup
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Face bow
Face bow
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Material for dental models
Material for dental models
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Vacuum-formed tray use
Vacuum-formed tray use
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Resin curing methods
Resin curing methods
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Thermoplastic resin
Thermoplastic resin
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Impression plaster
Impression plaster
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Add water to powder.
Add water to powder.
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Gypsum mixing bowl
Gypsum mixing bowl
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Study Notes
- Dental laboratory is separate from patient treatment areas
- Orthodontics might have a more extensive dental laboratory setup
- An articulator determines centric relation on a diagnostic model
- Gypsum products is most commonly used to create dental models
- A ratio of 100 g of powder to 45 to 50 ml of water, is the correct water-to-powder ratio of plaster
- Powder should be added to the water when mixing gypsum materials
- After pouring an impression, wait 45 to 60 minutes before separating the model from it
- The maxillary model is typically trimmed first
- A vacuum-formed tray is commonly made for a vital bleaching procedure
- Self-cure and light-cure are methods that acrylic resin can harden
- Bite registration wax is not commonly used to create a wall around a preliminary impression
- Thermoplastic resin is the material utilized for constructing a vacuum-formed custom tray
- Utility wax is not used to create room in a tray for the impression material
- A face bow is not used to grind away plaster or stone
- The #7 wax spatula is the most common size used in dental laboratories
- Impression plaster is one of the five forms of gypsum
- Do not add water to the powder when mixing gypsum materials
- The anterior portion of the maxillary, and mandibular model is not trimmed the same as other areas
- You should not wait for 30 to 45 minutes before separating the model from the impression
- Gypsum materials are not typically mixed in a metal bowl
- Specialty practices such as orthodontics do not require a dental laboratory setup, less extensive than general practices
- An EFDA can legally take preliminary impressions and bite registrations
- The primary use of a bite registration impression is recording occlusal relationships
- A custom tray is designed to fit an individual patient's mouth specifically
- The correct water-to-powder ratio for a maxillary impression using alginate is 3 scoops of powder to 3 measures of water
- Potassium alginate is the primary organic substance in hydrocolloid materials
- A special syringe or extruder is used to place light-bodied material around a prepared tooth
- Polyvinyl siloxane material is used for final impressions
- Elastomeric materials are not supplied in powder forms
- A quadrant tray covers only half of the dental arch
- A dental professional would choose fast-set alginate if the patient has a strong gag reflex
- An impression is not a positive reproduction
- The water-to-powder ratio for a maxillary impression is not two scoops of powder to one measure of water
- Utility wax is not used to extend the length of a tray
- Before utilizing reversible hydrocolloid, the material must be kept in a conditioning bath
- A perforated tray is not designed to fit a specific patient
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Description
Notes discuss legal aspects of EFDA's taking impressions and bite registrations. It also touches on impression uses, materials like alginate and polyvinyl siloxane, tray types, and managing gag reflexes during the procedure.
