Questions and Answers
What is the term used to refer to the structural portion of a dental model?
What device simulates the movement of the mandible in a dental lab?
Articulator
In a gypsum product, ________________ indicates that there are two parts of water to every one part of calcium sulfate.
Dihydrate
What mineral is used in the formation of plaster of Paris and stone?
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What term describes a material that is uniform in quality and consistent throughout?
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What machine is used for cutting or polishing dental appliances?
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What word describes a substance with very explosive properties?
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What process describes the formation of crystals?
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If an object is resistant to change in width, height, and length, it is said to be _____________.
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What is the term for the portion of an articulator used to measure upper teeth?
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The removal of half part water to one part calcium sulfate forms the powder product of gypsum known as _____________.
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What is a replica of the maxillary and mandibular arches made from an impression called?
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What is a molecule that, when combined with others, forms a polymer?
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What is the compound of many molecules called?
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What mixture of gypsum and water is used in the finishing of models?
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Where would you commonly find the dental lab in a dental office?
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Which specialty practices might have a more extensive laboratory setup?
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An example of a contaminated item that could be found in the dental lab would be?
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Which piece of lab equipment would be used to grind away plaster or stone?
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Which piece of lab equipment would the dentist use to determine centric relation from a diagnostic model?
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What is the size of the wax spatula most commonly used in the laboratory?
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Another name for a dental model is ____________.
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What dental material would be selected to fabricate a dental model?
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Which form of gypsum is used to fabricate a die for making an indirect restoration?
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The powder/water ratio of plaster for pouring a dental model is ____________.
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When a gypsum material is mixed, how is the powder and water incorporated?
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How are gypsum materials typically mixed?
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Which of the following is a section of a dental model?
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When pouring an impression, where would you begin placing the gypsum material in a mandibular impression?
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How long should you wait before separating a model from its impressions?
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Which of the two models do you begin trimming first?
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What is the one specific area of a dental model where the maxillary and mandibular models are trimmed differently?
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What should be placed between the two models when the trays are trimmed together?
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Of the three types of custom trays discussed, which technique uses volatile hazardous materials?
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What type of custom tray would be made for vital bleaching procedures?
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How is self-cured acrylic resin supplied for the fabrication of custom trays?
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What type of wax is used to form a wall around a preliminary impression when it is poured up?
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To extend an impression tray, what type of wax is used?
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What type of wax is used to get a patient's bite?
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What is placed to prevent a tray from seating too deeply onto the arch or quadrant?
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Study Notes
Laboratory Materials and Procedures
- Anatomic Portion: The structural part of a dental model.
- Articulator: Device simulating mandible movement; used with dental arch models.
- Dihydrate: In gypsum, indicates two water parts per one part calcium sulfate.
- Gypsum: Mineral essential for making plaster of Paris and dental stone.
- Homogeneous: Material that is consistent and uniform in quality throughout.
- Lathe: Machine designed for cutting or polishing dental appliances.
- Volatile: Refers to substances with explosive properties.
- Crystalization: Chemical process where crystals form structures.
- Dimensionally Stable: Describes objects resistant to changes in their dimensions.
- Facebow: Part of an articulator to measure upper teeth in relation to the temporomandibular joint.
- Hemihydrate: Gypsum powder formed by removing half of the water from calcium sulfate.
- Model: A replica of maxillary and mandibular arches created from an impression.
- Monomer: Molecule that combines with others to form polymers.
- Polymer: Compound made up of numerous molecules.
- Slurry: Mixture of gypsum and water used for finishing dental models.
- Dental Lab Location: Typically found in a separate area away from patient treatment.
- Extensive Lab Setups: Common in Fixed Prosthodontics and Orthodontics specialties.
- Contaminated Items: An example includes impressions found in dental labs.
- Model Trimmer: Equipment used to grind plaster or stone.
- Articulator for Diagnostic Models: Utilized by dentists to assess centric relation.
- Wax Spatula Size: Commonly used size is #7.
- Dental Model Synonym: Also known as a dental cast.
- Material for Dental Models: Gypsum is the primary material used.
- Die Fabrication Use: High strength stone is preferred for indirect restorations.
- Powder/Water Ratio for Plaster: The ideal ratio is 50 parts powder to 100 parts water.
- Mixing Gypsum Materials: Powder is added to water for mixing.
- Mixing Method: Gypsum is mixed using a spatula and rubber bowl.
- Sections of a Dental Model: Includes Anatomic and Art.
- Starting Point for Pouring Gypsum: Begin at the most posterior tooth in a mandibular impression.
- Model Separation Time: Wait 40 to 60 minutes before separating a model from its impression.
- Trimming Sequence: Always start trimming with the maxillary model.
- Trimming Differences: Maxillary and mandibular models are trimmed differently, especially at the anterior portion.
- Wax Bite Usage: Placed between two models when trays are trimmed together.
- Custom Trays: Acrylic resin technique involves hazardous volatile materials.
- Vital Bleaching Trays: Made from thermoplastic resin.
- Self-Cured Acrylic Resin Supply: Available in powder and liquid form for custom trays.
- Boxing Wax: Used to form a wall around a preliminary impression when pouring up.
- Utility Wax: Rope utility wax is used to extend an impression tray.
- Bite Registration Wax: Baseplate wax is utilized to capture a patient's bite.
- Spacer Stops: Used to prevent a tray from seating too deeply onto the arch or quadrant.
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Description
This quiz covers key concepts and materials used in dental laboratories. Participants will learn about components like gypsum, articulators, and the crystallization process. Test your knowledge on the various terms and their significance in dental model preparation.
