Dental Assisting Quiz on Clinical Surfaces and Equipment

A pliable, tacky material used to extend the borders of an impression tray, providing a more accurate and complete impression.

The process of creating a mold of a patient's teeth and surrounding tissues.

The outer edges of an impression tray, which help to capture the complete outline of the patient's teeth and surrounding tissues.

Applying topical anesthetic to the injection site for an adequate duration allows the medication to penetrate the skin and numb the area effectively.

The recommended application time for topical anesthetic to achieve optimal numbing effect is between 60 and 120 seconds.

Applying topical anesthetic for less than 60 seconds may not allow sufficient time for the medication to penetrate the skin and provide adequate numbing.

The recommended application time is 60-120 seconds, allowing the medication to penetrate the skin effectively.

The recommended time for topical anesthetic application is 60-120 seconds, which is the minimum time needed for optimal effectiveness.

A mechanical device that holds dental models in a specific position, simulating the relationship between the upper and lower jaws.

A process used to record the relationship between the upper and lower jaws, commonly used for creating casts.

A replica of a patient's teeth and surrounding tissues, created from an impression.

The property of a material giving off heat during a chemical reaction.

A type of dental cement that releases heat during mixing and requires careful handling.

A mechanical device that replicates the relationship between the upper and lower jaws (maxilla and mandible) to hold dental models in place during dental procedures.

The articulator is used in the dental lab to create accurate models of the teeth and jaws.

The articulator mimics the movement of the jaw, allowing for precise positioning of teeth and restorations.

The position and movement of the mandible in relation to the maxilla.

A device used to record the relationship between the upper and lower teeth.

Epinephrine is a medication commonly used in local anesthetic to constrict blood vessels and reduce bleeding. However, its use can pose risks for individuals with heart disease due to the increased strain it places on the heart.

Epinephrine, when used in local anesthesia, constricts the blood vessels, leading to a temporary decrease in blood flow to the area. This action helps to control bleeding and prolong the effect of the anesthetic.

Patients with heart disease are more vulnerable to complications caused by the vasoconstricting effects of epinephrine, which can lead to increased heart rate and blood pressure, potentially putting a strain on their heart.

The speed of a slow-speed handpiece, measured in rotations per minute (rpm), ranges from 10,000 to 30,000.

A slow-speed handpiece is a dental tool used for tasks that require lower speeds, such as preparing cavities, removing decay, and smoothing tooth surfaces.

High cholesterol, a condition characterized by high levels of cholesterol in the blood, is not usually considered a direct contraindication for epinephrine use in local anesthetic. However, individuals with existing heart disease are often associated with high cholesterol, and therefore, caution is advised if there is a history of heart disease.

The slow-speed handpiece is used for tasks that require lower speed and more control. The speed range allows for precise and gentle preparation or removal of tooth structure.

Low blood pressure itself does not typically contraindicate the use of epinephrine in local anesthesia. While epinephrine raises blood pressure, its use is still permissible for individuals with low blood pressure unless they have other underlying conditions that might be affected by epinephrine.

A handpiece is a dental instrument that attaches to a dental unit and provides power to tools used for dental procedures.

The speed range of a slow-speed handpiece is 10,000 to 30,000 rpm, while the speed range of a high-speed handpiece is much faster, typically 200,000-450,000 rpm.

Surfaces that come into direct contact with patients, like instruments, gloves, and dental chairs.

Surfaces that can be contaminated by splashes or sprays of bodily fluids, such as countertops, sinks, and walls.

Surfaces that can be contaminated by droplets of saliva or blood, such as dental equipment, light handles, and keyboards.

The Organization for Safety, Asepsis, and Prevention.

They classify clinical contact surfaces into three categories: Touch and Transfer, Splash and Spatter, and Droplet.

A type of gypsum used for creating durable dental casts, known for its yellow color.

Dental stone is stronger and more durable than impression plaster, die stone, and high-strength stone. It's also characterized by its yellow color.

Dental stone produces a more detailed and accurate cast, allowing for better planning and execution of dental procedures.

Dental stone is commonly used to create accurate replicas of teeth and surrounding tissues, aiding in diagnosis and treatment planning.

Dental stone offers greater durability compared to other gypsum products, making it ideal for creating casts that can withstand handling and repeated use.

Elastomeric impression materials are used when the most accurate impression is needed. These materials, like polyvinylsiloxanes, are known for their flexibility, making them ideal for capturing intricate details of the teeth and gums.

Alginates set quickly and are good for preliminary impressions. However, they are less accurate for final impressions due to their tendency to distort and warp. Elastomeric materials offer a more stable and detailed impression that is suitable for long-term use.

Sapphire or diamond polishing paste is the preferred option for polishing porcelain, achieving a smooth and shiny finish.

OSAP classifies clinical surfaces into three categories: "clean", "disinfected", and "sterile". Each category represents a different level of microbial reduction.

Impression plaster is a material used for creating study casts. It is not used for final impressions due to its inflexibility and the potential for inaccurate representation of the teeth and surrounding tissues.

Reversible hydrocolloids, like agar, are used in some dental procedures, but are not typically the first choice for creating final impressions. They are more prone to changes in temperature and moisture, making them less stable.

Aluminum oxide is a common abrasive used in dentistry, but it is not typically used for polishing porcelain.

These materials create precise and stable replicas of the teeth and surrounding tissues, ensuring a successful outcome for the restorative or prosthetic procedure.

Fine pumice is an abrasive material that can be used for polishing, but it's typically not the best choice for porcelain.

Zirconium silicate is a ceramic material used in dental restorations, but it's not the ideal abrasive for polishing porcelain.