Dental Materials Quiz: Bite Registration Techniques

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Questions and Answers

What is a significant advantage of using Polysiloxane Bite Registration Paste?

  • It is the most durable material available.
  • It has a strong resistance to biting forces.
  • It maintains its properties even when cooled.
  • It has no odor or taste for the patient. (correct)

Which statement about Wax Bite Registration is true?

  • It is considered a more durable option compared to paste systems.
  • It shows the occlusal relationship without any temperature sensitivity.
  • It is prone to changes in temperature which affects its properties. (correct)
  • It is difficult to manipulate and requires extensive technique.

What is the primary use of Zinc Oxide-Eugenol Bite Registration Paste?

  • As a primary material in orthodontics.
  • Only for denture relines.
  • As a quick-setting option for all types of registrations.
  • For general bite registrations and impressions without displacing tissues. (correct)

Which of the following describes the material form of Zinc Oxide-Eugenol Bite Registration Paste?

<p>Mixed in a two-part system and placed on a paper pad. (A)</p> Signup and view all the answers

What kind of tray is used for applying Zinc Oxide-Eugenol Bite Registration Paste?

<p>Gauze tray. (A)</p> Signup and view all the answers

What does the Automix system primarily eliminate during the mixing process?

<p>Material waste (C)</p> Signup and view all the answers

Which viscosity types can be used with the Automix system?

<p>Light, medium, or heavy-bodied materials (B)</p> Signup and view all the answers

Which elastomeric material is characterized by having heavy and light-bodied varieties?

<p>Polysulfide (C)</p> Signup and view all the answers

What is the importance of timing when using a paste system for elastomeric materials?

<p>To prepare materials in advance before use (C)</p> Signup and view all the answers

What feature of the Automix system improves efficiency in mixing materials?

<p>Automatic mixing mechanism (C)</p> Signup and view all the answers

What characteristic of elastomeric impression materials allows them to be removed after setting without distortion?

<p>They have a rubber-like quality. (B)</p> Signup and view all the answers

Which of the following describes a specific form of elastomeric impression materials commonly used for detailed impressions?

<p>Light-bodied (A)</p> Signup and view all the answers

Elastomeric impression materials are supplied as a base and a catalyst. How are they typically supplied?

<p>In paste, cartridge, or putty form (D)</p> Signup and view all the answers

What is the primary curing method of elastomeric impression materials?

<p>Self-curing process (C)</p> Signup and view all the answers

Which elastomeric impression material form is generally suitable for capturing details of larger impressions?

<p>Regular and regular-bodied (D)</p> Signup and view all the answers

What is a key advantage of the controlled dispensing feature in the mixing unit?

<p>It prevents excess material on the mixing pad. (C)</p> Signup and view all the answers

How does kneading putty impression material benefit the mixing process?

<p>It warms the material, accelerating setting time. (B)</p> Signup and view all the answers

Which elastomeric material is commonly referred to as rubber base?

<p>Polysulfide (D)</p> Signup and view all the answers

What term describes an elastomeric material's ability to maintain its shape after removal from the mouth?

<p>Dimensional stability (D)</p> Signup and view all the answers

Which of the following statements is true about permanent deformation in elastomeric materials?

<p>Some materials resist permanent deformation better than others. (D)</p> Signup and view all the answers

What is the primary characteristic of elastomeric impression materials?

<p>They have elastic or rubber-like qualities. (C)</p> Signup and view all the answers

Which type of elastomeric impression material is directly dispensed onto the teeth?

<p>Light-bodied material (D)</p> Signup and view all the answers

What temperature is required for the storage bath of reversible hydrocolloid before taking an impression?

<p>150°F (65.5°C) (C)</p> Signup and view all the answers

What is the purpose of placing plastic stops in the tray during the impression process?

<p>To prevent the tray from sticking to teeth. (B)</p> Signup and view all the answers

What is the recommended temperature to increase the viscosity of the tray material?

<p>110°F (43.3°C) (A)</p> Signup and view all the answers

Why should the syringe material be liquefied before use?

<p>To allow easy flow during the application. (C)</p> Signup and view all the answers

What is one major disadvantage of polysulfide as a dental impression material?

<p>It has a strong odor and stains clothing. (D)</p> Signup and view all the answers

In what way do light-bodied materials differ from heavy-bodied materials?

<p>Light-bodied materials can flow more easily into details. (A)</p> Signup and view all the answers

Which of the following properties describes polyether as a dental impression material?

<p>Good stiffness and stability with excellent dimensional stability. (A)</p> Signup and view all the answers

What is the wrong action regarding the treatment of heavy-bodied impression material?

<p>Tempering it before use. (C)</p> Signup and view all the answers

What is the primary chemical component in polysulfide impression materials?

<p>Mercaptan polysulfide (A)</p> Signup and view all the answers

Which dental impression material is affected by water, saliva, and blood?

<p>Polyether (B), Silicone (Condensation Silicone) (C)</p> Signup and view all the answers

What is a primary reason for the use of a thinner in mixing polyether?

<p>To reduce viscosity. (C)</p> Signup and view all the answers

Which statement best describes the mixing characteristics of condensation silicone?

<p>It is easy to mix and offers superior impression properties. (C)</p> Signup and view all the answers

What is a significant factor that affects the performance of silicone impression materials?

<p>Contact with water, saliva, and blood (C)</p> Signup and view all the answers

Which of the following statements about mixing polysulfide is incorrect?

<p>The pastes can be mixed directly on the dental tray. (C)</p> Signup and view all the answers

What is a characteristic of light-bodied material in dental applications?

<p>It is dispensed using a special syringe or extruder. (A)</p> Signup and view all the answers

Why is regular and heavy-bodied material often used in dental trays?

<p>Its stiffness helps force the light-bodied material into close contact. (B)</p> Signup and view all the answers

What happens if different types of impression materials are mixed incorrectly?

<p>The mix may not set or lack important properties. (A)</p> Signup and view all the answers

In what form can impression materials be packaged?

<p>In paste or liquid forms, among others. (B)</p> Signup and view all the answers

What is one advantage of using light-bodied material in dental procedures?

<p>It flows easily into and around prepared tooth details. (B)</p> Signup and view all the answers

What is the first stage of the curing process for elastomeric materials?

<p>Initial set (C)</p> Signup and view all the answers

What must be done to the impression material after it has reached its final set?

<p>It needs to be disinfected and placed in a biohazard bag. (C)</p> Signup and view all the answers

Which impression material mixing sequence is commonly used?

<p>Light-bodied material first, then heavy-bodied material. (C)</p> Signup and view all the answers

What type of impression material may be warm to the touch when seated in the mouth?

<p>Putty impression material (D)</p> Signup and view all the answers

How long does the final cure of elastomeric material typically take?

<p>1 to 24 hours (A)</p> Signup and view all the answers

What is a primary benefit of using a top or wall-mounted mixing unit system?

<p>Enhances infection control and material versatility. (A)</p> Signup and view all the answers

What is the purpose of placing a gingival retraction cord in the sulcus?

<p>To provide space for the light-bodied material. (A)</p> Signup and view all the answers

Which type of elastomer is commonly used in dental practices?

<p>Polyvinyl siloxane (PVS) (C)</p> Signup and view all the answers

Which component serves as the base for polyether impression material?

<p>Polyether (D)</p> Signup and view all the answers

What is the effect of water, saliva, and blood on the setting process of polyether material?

<p>They cause marginal discrepancy. (A)</p> Signup and view all the answers

What is one of the key properties of polysiloxane impression material?

<p>High dimensional stability. (D)</p> Signup and view all the answers

Which of the following best describes the handling characteristic of polysiloxane impression material?

<p>It is easy to handle when taking final impressions. (D)</p> Signup and view all the answers

What is a critical guideline when removing a polyether impression?

<p>Rock slightly to prevent tearing. (C)</p> Signup and view all the answers

Which of the following catalysts is used in the chemical makeup of polysiloxane impression material?

<p>Chloroplatinic acid (C)</p> Signup and view all the answers

What is a disadvantage of polyether impression material?

<p>It is very stiff and hard to remove. (A)</p> Signup and view all the answers

Which impression material is categorized as having low tear resistance?

<p>Polysiloxane (A)</p> Signup and view all the answers

What is alginate primarily used for in dental practices?

<p>Preliminary impressions and various dental appliances (D)</p> Signup and view all the answers

Which component of alginate is responsible for thickening the mixture?

<p>Potassium alginate (C)</p> Signup and view all the answers

What occurs if alginate impressions are stored in open air?

<p>They can undergo syneresis (C)</p> Signup and view all the answers

Which factor does NOT affect the dimensional stability of alginate impressions?

<p>The type of impression material used (D)</p> Signup and view all the answers

What is the recommended action immediately after taking an alginate impression?

<p>Pour up the impression within one hour (C)</p> Signup and view all the answers

What is the working time for the fast set alginate?

<p>1.5 minutes (B)</p> Signup and view all the answers

Which of the following correctly describes the sol phase of alginate?

<p>It's a fluid or semiliquid form (A)</p> Signup and view all the answers

What is the purpose of trisodium phosphate in alginate?

<p>To slow the reaction time of mixing (A)</p> Signup and view all the answers

Flashcards

Initial Set

The initial stage of the curing reaction where the material stiffens but doesn't yet become elastic. This is the only stage where the material can be manipulated.

Final Set

The second stage of the curing reaction where the material gains elasticity and transitions from a paste to a solid rubbery mass. It's critical for the material to be in place in the mouth before this stage begins.

Final Cure

The final stage of the curing reaction where the material undergoes minimal changes in its dimensions and becomes fully hardened. It typically takes 1 to 24 hours for the final cure.

Light-bodied Material

A type of impression material that has a lower viscosity and is typically used for detailed impressions around teeth. When mixed with a catalyst, it sets to a rubber-like consistency.

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Heavy-bodied Material

A type of impression material that has a higher viscosity and is typically used for the main part of the impression, filling the tray. When mixed with a catalyst, it sets to a rubber-like consistency.

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Putty Material

A type of impression material that includes a higher viscosity, may be warm to the touch when seated in mouth, accelerating working time.

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Basic Impression Technique

A dental impression technique that involves using a tray and a light and heavy-bodied impression material to capture the precise shape of teeth and surrounding tissues.

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Elastomeric Material

A group of materials used for dental impressions that are known for their flexibility and ability to capture intricate details. They are based on silicone and are often used for crowns, bridges, and other restorative dental procedures.

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Regular or Heavy-Bodied Material

A type of dental impression material that is thicker and denser, used to fill the tray and support the light-bodied material.

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Viscosity

The property of a material that describes its resistance to flow. Light-bodied materials have a lower viscosity, allowing them to flow easily.

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Catalyst or Accelerator

A chemical that is added to another material to trigger a reaction and start the setting process.

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Mixing Different Materials

Mixing materials from different brands or batches can be risky, resulting in setting problems or undesired properties.

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Automix System

A device that automatically mixes elastomeric impression materials, ensuring precise proportions and minimizing waste.

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Light-bodied First, then Heavy-bodied

A mixing technique for elastomeric impression materials where a light-bodied material is prepared first, followed by a heavy-bodied material.

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Polysulfide

A type of elastomeric impression material known for its durability and use in final impressions. Comes in regular, heavy, and light-bodied varieties.

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Paste System

A system where elastomeric materials are delivered in two separate tubes (base and catalyst) and mixed within the device before application.

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Timing is Critical in Paste Systems

The timing process is crucial in paste systems, where the proper consistency of the mixed materials is essential for a successful impression.

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Dimensional stability

The ability of a material to maintain its shape after removal from the mouth.

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Mixing unit

A mixing unit that dispenses impression materials, offering controlled application and infection control.

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Deformation resistance

The ability of a material to resist permanent changes when force is applied during removal.

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Putty impression material

A type of impression material that offers a warm, putty-like consistency, allowing for faster setting time.

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Elastomeric Impression Materials

Impression materials with rubber-like qualities, allowing for accurate mold removal.

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Reversible Hydrocolloid

A type of elastomeric impression material that can be repeatedly softened and solidified by temperature changes.

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Temper

The process of preparing reversible hydrocolloid before an impression is taken.

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Temper Bath

The bath used to heat up reversible hydrocolloid so it can be used.

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Stock Water-Cooled Tray

A special tray used for taking impressions with reversible hydrocolloid.

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Elastomeric

A category of dental impression materials known for their flexibility and ability to capture detailed impressions.

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Self-Curing

Materials that change from a paste to a solid state on their own, without external heat.

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Light-bodied Impression Material

A type of elastomeric impression material that flows easily, making it great for taking detailed impressions of teeth.

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Regular or Heavy-bodied Impression Material

A type of elastomeric impression material that has a thicker consistency, designed to support the light-bodied material and fill the tray.

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Polyether

A dental impression material known for its strength and stability, used for taking impressions for crowns and bridges.

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Silicone (Condensation Silicone)

A dental impression material known for its accuracy and ease of use, often used for crowns and bridges.

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Catalyst

A component of dental impression materials that helps them to set by reacting with the base material.

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Filler

A type of filler added to dental impression materials to enhance their properties, such as strength and stability.

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Setting Time

The time it takes for a dental impression material to become fully hardened, typically measured in minutes.

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Accuracy

A property of dental impression materials that describes their ability to capture fine details.

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Bite Registration

A paste-like material used to record the relationship between upper and lower teeth when the mouth is closed (centric occlusion).

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Polysiloxane Bite Registration Paste

A type of bite registration material known for its quick setting time, ease of use, and lack of unpleasant taste or smell.

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Wax Bite Registration

A material used for bite registration that is simple to use but sensitive to temperature changes.

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Zinc Oxide-Eugenol (ZOE) Bite Registration Paste

A durable bite registration material used for impressions where tissue displacement is a concern, such as denture relines or temporomandibular joint (TMJ) impressions.

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Gauze Tray

A type of tray used to apply ZOE bite registration paste, often made of a soft, absorbent material like gauze.

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Polyether Impression Material

A highly accurate and dimensionally stable material used for making impressions. Stiffness makes it difficult to remove without rocking.

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Factors Affecting Polyether Setting

Water, saliva, or blood can affect the setting process of polyether material, causing inaccuracies. Moisture can also increase water absorption if a thinner is used.

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Polysiloxane Impression Material

This material is commonly used in dental impression procedures, known for its flexibility, high dimensional stability, and ease of handling.

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Polysiloxane (Polyvinyl Siloxane)

A type of impression material used for final impressions, known for its excellent dimensional stability and the ability to delay the pouring of the model for up to 7-10 days.

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Syringe Technique

A technique in which light-bodied material is injected around a prepared tooth with a syringe to achieve precise detail capture.

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Light-bodied then Heavy-bodied Technique

Light-bodied impression material is applied first, followed by heavy-bodied material. This combination ensures both detail and support.

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Paste System for Impression Material

A system where two pastes (base and catalyst) are mixed together to create a final impression material. This method allows for controlled mixing.

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Alginate

An irreversible hydrocolloid material used for preliminary impressions, diagnostic casts, orthodontic appliances, and more.

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Alginate Sol

The liquid or semiliquid form of alginate before it sets.

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Alginate Gel

The semi-solid form of alginate after it sets, similar to pudding.

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Imbibition

The tendency of alginate to absorb additional water, leading to distortion.

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Syneresis

The tendency of alginate to lose moisture and shrink, leading to distortion.

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Alginate Working Time

Time needed to mix, load the tray, and position the impression in the patient's mouth.

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Alginate Setting Time

Time needed for the chemical reaction to complete and the alginate to be ready for removal.

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Normal Set and Fast Set Alginate

Types of alginate with different working and setting times.

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