Dental Anatomy and Disinfection Quiz

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Questions and Answers

What is the primary function of teeth #1, #2, and #3?

  • Crushing and grinding (correct)
  • Crunching and clenching
  • Ripping and tearing
  • Slicing and cutting

Which characteristic distinguishes molars from other types of teeth?

  • Flat surfaces for grinding (correct)
  • Pointed tips for piercing
  • Long roots for stability
  • Sharp edges for tearing

How do molars assist in the process of digestion?

  • By filtering food materials before swallowing
  • By crushing and grinding food into small parts (correct)
  • By shredding fibers into fine pieces
  • By quickly breaking down sugars

What describes the size and shape of molars compared to other teeth?

<p>Larger and broader (B)</p> Signup and view all the answers

Which of the following activities are molars least responsible for?

<p>Biting into hard foods (B)</p> Signup and view all the answers

What is the primary use of alginate in dentistry?

<p>Preliminary impressions (B)</p> Signup and view all the answers

Which agency is responsible for regulating disinfectants and sterilants?

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

Which of the following materials is classified as an irreversible hydrocolloid?

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

What role does the EPA have in relation to disinfectants?

<p>It monitors their environmental impact. (D)</p> Signup and view all the answers

What might indicate the need to repair a denture?

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

Which type of material is NOT typically used for preliminary impressions?

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

Which organization primarily deals with the regulation of medical devices, including some disinfectants?

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

If a new disinfectant is introduced to the market, which agency would be responsible for its assessment?

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

Which property defines alginate as a hydrocolloid?

<p>It is irreversible and hydrophilic (D)</p> Signup and view all the answers

Which of the following agencies is not involved in the registration of disinfectants?

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

Which cement requires mixing on a cool, dry glass slab due to its exothermic reaction?

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

Which of the following cements is NOT exothermic during the mixing process?

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

What characteristic is associated with zinc phosphate cement?

<p>It requires a special mixing technique to avoid heat. (A)</p> Signup and view all the answers

Which material is commonly used to mix dental cements due to its properties?

<p>Cool, dry glass slab (C)</p> Signup and view all the answers

Which of these cements is most likely to be chosen for its exothermic reaction during setting?

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

How often should splash, spatter, and droplet surfaces be cleaned?

<p>At least once per day (C)</p> Signup and view all the answers

What is the minimum frequency for cleaning splash, spatter, and droplet surfaces?

<p>At least once per day (A)</p> Signup and view all the answers

Which of the following statements is true regarding the cleaning of splash, spatter, and droplet surfaces?

<p>They should be cleaned at least once per day (B)</p> Signup and view all the answers

What frequency of cleaning splash, spatter, and droplet surfaces is NOT recommended?

<p>At the beginning or end of each week (D)</p> Signup and view all the answers

Which cleaning schedule is not advisable for splash, spatter, and droplet surfaces?

<p>Once a month (D)</p> Signup and view all the answers

What is the recommended technique to remove alginate impression trays from a patient's mouth?

<p>Use a firm snapping motion (D)</p> Signup and view all the answers

Which motion should be avoided when removing alginate impression trays?

<p>Twisting and pulling sideways (B)</p> Signup and view all the answers

What should be done before using a firm snapping motion to remove an alginate impression?

<p>Break the seal of the impression (D)</p> Signup and view all the answers

What is a common misconception about removing alginate impression trays?

<p>Snapping motions cause discomfort to patients (A)</p> Signup and view all the answers

What must be ensured before applying a snapping motion to remove an alginate impression?

<p>The impression seal is broken (A)</p> Signup and view all the answers

What does the acronym AED represent?

<p>Automated external defibrillator (C)</p> Signup and view all the answers

Which of the following is NOT a correct expansion of AED?

<p>Automated easily defibrillator (D)</p> Signup and view all the answers

What is the primary use of an AED?

<p>To help the heart return to a normal rhythm (A)</p> Signup and view all the answers

Which type of instruments are classified as semi-critical instruments?

<p>Dental hygiene scalers (A)</p> Signup and view all the answers

In which scenario would an AED typically be used?

<p>When a person is unconscious with no pulse (B)</p> Signup and view all the answers

What is the primary requirement for semi-critical instruments?

<p>Some level of sterilization (A)</p> Signup and view all the answers

Which instrument is least likely to be classified as semi-critical?

<p>Lead apron (B)</p> Signup and view all the answers

Which of the following is a key feature of an AED?

<p>Provides voice prompts to guide the user (A)</p> Signup and view all the answers

Which of the following best describes semi-critical instruments?

<p>Instruments used with non-intact skin (D)</p> Signup and view all the answers

Which classification relates to the lowest level of required sterilization?

<p>Non-critical instruments (D)</p> Signup and view all the answers

Which of the following is an EPA registered intermediate level hospital disinfectant recommended for use on surface areas soiled with potentially infectious patient material?

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

What level of disinfectant is an iodophor classified as?

<p>Intermediate level disinfectant (C)</p> Signup and view all the answers

Which disinfectant is NOT appropriate for use on potentially infectious patient material surfaces?

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

Which of the following disinfectants is typically used for sterilization rather than disinfecting surfaces?

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

Which agent is commonly mixed with surfactants to improve its efficacy as a disinfectant?

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

Which two bacteria are primarily responsible for causing dental caries?

<p>Mutans streptococci and lactobacilli (C)</p> Signup and view all the answers

What role do mutans streptococci play in dental health?

<p>Cause dental caries (C)</p> Signup and view all the answers

How do lactobacilli contribute to dental health issues?

<p>They form from sugar intake (D)</p> Signup and view all the answers

Which statement is true regarding the bacteria involved in dental caries?

<p>Lactobacilli only appear in the presence of high sugar intake. (D)</p> Signup and view all the answers

What is a common misconception about the relationship between sugar intake and dental bacteria?

<p>Sugar intake increases the presence of lactobacilli. (D)</p> Signup and view all the answers

Flashcards

Zinc Phosphate Cement

A type of dental cement that releases heat during mixing. It is commonly used for permanent restorations.

Zinc Oxide-Eugenol Cement

A dental cement made from zinc oxide and eugenol. It is known for its soothing properties and is often used for temporary fillings.

Glass Ionomer Cement

A dental cement that releases fluoride and can be used for both restorations and bonding.

Polycarboxylate Cement

A dental cement that is known for its strong bond to tooth structure and is often used for permanent restorations.

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Dental Cement

A material used in dental procedures that acts as a bond between different materials.

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What is alginate?

Alginate is a type of dental impression material that sets irreversibly after mixing with water, creating a mold of teeth and gums.

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What is the purpose of a preliminary impression?

Preliminary impressions are taken before more detailed impressions are needed for procedures like crowns or bridges.

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What are irreversible hydrocolloids?

Irreversible hydrocolloids are impression materials that, once mixed with water, cannot be reversed back to their original liquid state.

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What are hydrocolloids?

Hydrocolloid materials are impression materials that contain water as a major component.

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Why is alginate used for preliminary impressions?

Alginate is used for preliminary impressions because it is inexpensive, easy to use, and sets quickly.

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Crushing and grinding

The act of breaking down food into smaller pieces by pressing it between two surfaces.

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Molars

These teeth are located at the back of the mouth. They have flat surfaces and are wider than other teeth.

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What is the primary function of molars?

The main function of molars is to crush and grind food into smaller pieces.

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Which teeth are molars?

Teeth #1, #2, and #3 are molars.

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Why is crushing and grinding food important?

This process is essential for digestion and helps the body absorb nutrients.

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Splash, Spatter, and Droplet Surfaces

Surfaces that come into contact with splashes, spatters, or droplets of saliva or blood, but not with contaminated instruments or supplies.

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Daily Cleaning of Splash, Spatter, and Droplet Surfaces

Cleaning splash, spatter, and droplet surfaces at least once a day ensures a clean and hygienic environment for both the dental professional and the patient.

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Cleaning Frequency of Splash, Spatter, and Droplet Surfaces vs. Instruments

While instruments and supplies require more frequent cleaning due to direct contact with patients, splash, spatter, and droplet surfaces can be cleaned less often.

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Cleaning Frequency of Contaminated Instruments and Supplies

Cleaning surfaces that come into contact with contaminated instruments or supplies should be done between each client.

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Importance of Cleaning Dental Surfaces

To reduce the risk of spreading infections, it is crucial to maintain a clean dental environment.

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Mutans streptococci

The primary bacteria responsible for tooth decay. These bacteria thrive on sugars and produce acids that attack tooth enamel.

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Lactobacilli

Another type of bacteria involved in dental caries. They play a significant role in progressing cavities by further eroding tooth enamel.

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Plaque

A sticky film that forms on teeth, containing both good and bad bacteria. It acts as a breeding ground for mutans streptococci.

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Dental Caries

Dental caries, also known as tooth decay, is a disease that damages tooth enamel. It is primarily caused by specific types of bacteria that feed on sugar.

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Tooth Enamel Erosion

The process where acid from bacteria breaks down and erodes tooth enamel, leading to cavities.

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Who regulates disinfectants & sterilants?

The Environmental Protection Agency (EPA) is responsible for registering and regulating disinfectants and sterilants used in the United States.

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What agency regulates medical devices?

The Food and Drug Administration (FDA) is responsible for ensuring the safety and effectiveness of medical devices, including disinfectants and sterilants.

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Semi-critical Instruments

Instruments that come into contact with mucous membranes or non-intact skin, requiring sterilization to prevent infections.

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What is an intermediate-level hospital disinfectant?

A disinfectant that kills bacteria and viruses, making it suitable for cleaning surfaces contaminated with potentially infectious materials.

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What is an EPA-registered intermediate-level disinfectant?

An EPA-registered disinfectant specifically designed for surfaces contaminated with potentially infectious patient material.

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What is an iodophor?

An antiseptic containing iodine, recommended for cleaning surfaces contaminated with potentially infectious patient material.

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What are NOT adequate disinfectants for contaminated surfaces?

Alcohol, ethylene oxide and glutaraldehyde are NOT EPA-registered intermediate-level hospital disinfectants for surfaces contaminated with potentially infectious patient material.

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Why is Iodophor the best choice?

Iodophor is an EPA-registered disinfectant, making it the most suitable choice for cleaning surfaces potentially containing infectious patient material.

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How to remove alginate impressions?

A quick and firm snapping motion is the best way to remove alginate impressions from a patient's mouth. This method ensures the removal of the impression without damaging it or harming the patient.

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Why use a snapping motion for alginate removal?

Using a firm snapping motion to remove alginate impressions allows for a quick and efficient removal, minimizing discomfort for the patient while ensuring the integrity of the impression.

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What to do before removing an alginate impression?

Before removing an alginate impression, gently break the seal between the impression and the patient's tissues. This helps prevent discomfort and potential damage.

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Why take alginate impressions?

Alginate impressions are taken to create a mold of the patient's teeth and gums. They are used for procedures such as creating models for dentures, bridges, or crowns.

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What NOT to do when removing alginate impressions?

When removing an alginate impression, avoid tugging, twisting, or pulling sideways. These actions could damage the impression and cause discomfort to the patient.

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What is an AED?

An automated external defibrillator (AED) is a portable medical device that can deliver an electrical shock to a person's heart to restore a normal heartbeat after cardiac arrest.

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Who can use an AED?

AEDs are designed to be used by non-medical professionals in emergency situations. They are relatively easy to operate, providing voice prompts and visual instructions to guide users.

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How does an AED work?

AEDs work by analyzing the heart's rhythm and delivering an electric shock if necessary. This shock can restart a normal heartbeat if the heart is in a life-threatening rhythm like ventricular fibrillation.

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Why is AED important?

AEDs are essential for increasing survival rates from sudden cardiac arrest. They are available in many public locations, like airports, schools, and gyms.

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How to use an AED?

If someone collapses and is unresponsive, call for help immediately and then use an AED if available. Follow the voice and visual prompts from the AED.

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Study Notes

Identifying the Correct Dental Cement

  • The cement that becomes exothermic and should be mixed on a cool, dry glass slab is zinc phosphate.

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