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DANB's RF (RF) Practice Tests & Test Prep by Exam Edge - Exam Info

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DANB's Restorative Functions - Additional Information

At, we focus on making our clients' career dreams come true by offering world-class practice tests designed to cover the same topics and content areas tested on the actual Dental Assisting National Board DANB's Restorative Functions (RF) Certification Exam. Our comprehensive DANB's Restorative Functions practice tests are designed to mimic the actual exam. You will gain an understanding of the types of questions and information you will encounter when you take your Dental Assisting National Board DANB's Restorative Functions Certification Exam. Our DANB's Restorative Functions Practice Tests allow you to review your answers and identify areas of improvement so you will be fully prepared for the upcoming exam and walk out of the test feeling confident in your results.

Because our practice tests are web-based, there is no software to install and no need to wait for a shipment to arrive to start studying. Your DANB's Restorative Functions practice tests are available to you anytime from anywhere on any device, allowing you to study when it works best for you. There are 5 practice tests available, each with 105 questions and detailed explanations to help you study. Every exam is designed to cover all of the aspects of the DANB's RF exam, ensuring you have the knowledge you need to be successful!

DANB's Restorative Functions - Additional Info Sample Questions

Which of the following materials contains an organic solvent which should not be placed under a composite resin? 

Correct Answer:
resin varnish

resin varnish, also known as copal varnish, is a dental material that primarily serves as a protective barrier between dentin and restorative materials in dental procedures. it is composed of polyurethane polymers that are dissolved or suspended in an organic solvent. the role of the organic solvent in resin varnish is to facilitate the application and adhesion of the varnish to the tooth structure.

however, when it comes to using resin varnish under composite resins, there are significant compatibility issues that must be considered. composite resins are widely used in dentistry for restorative procedures due to their aesthetic appeal and durability. these resins typically polymerize (harden) through a chemical reaction that can be inhibited by the presence of certain substances, including organic solvents.

the organic solvent in resin varnish can interfere with the polymerization process of composite resins. this can result in inadequate curing of the composite material, leading to weaknesses in the restoration, reduced bond strength, and potentially shorter longevity of the filling or restoration. furthermore, the solvent can compromise the integrity of the bond between the resin composite and the tooth structure, increasing the risk of microleakage, which can lead to secondary caries and post-operative sensitivity.

in contrast, other materials listed such as fluoride varnish, calcium hydroxide, and acid etchant do not contain organic solvents that interfere with the curing of composite resins. fluoride varnish is used to enhance tooth remineralization and reduce sensitivity; calcium hydroxide serves as a protective liner or pulp-capping agent with antibacterial properties and promotes the formation of secondary dentin; acid etchant is used to roughen the tooth surface to improve the bonding of the composite resin.

in conclusion, due to the incompatibility of resin varnish with composite resins owing to its organic solvent content, it should not be used as an underlayer for composite resin restorations. instead, other compatible materials should be considered to ensure the longevity and effectiveness of the dental restoration.

Which of the following is NOT an application of use for glass ionomers? 

Correct Answer:
sedative base

glass ionomer cements are versatile materials used extensively in dentistry due to their unique properties, such as fluoride release and chemical bonding to tooth structure. to address the question of which application is not suitable for glass ionomers, we need to understand where these materials excel and where they might fall short.

firstly, glass ionomers are widely used for non-load bearing restorations. these are areas in the mouth where the force exerted by chewing is minimal, such as in small cavities in the front teeth or non-occlusal surfaces of back teeth. glass ionomers are ideal for these applications because while they are not as strong as composite resins or amalgam, they bond chemically to the tooth structure, release fluoride that helps prevent further decay, and have a coefficient of thermal expansion similar to that of natural tooth enamel.

glass ionomers are also excellent as cavity liners and as a core material for buildup. as liners, they provide a protective layer between the tooth tissue and restorative materials like amalgam or composites, which might be more thermally conductive or potentially irritating to the pulp. when used as a core buildup material, glass ionomers help in providing a strong foundation for dental crowns after root canal treatment, especially in cases where little tooth structure remains.

furthermore, their ability to release fluoride makes glass ionomers particularly beneficial for patients at high risk of recurrent decay. this ongoing fluoride release can help remineralize the tooth structure around the restoration, thus preventing new cavities from forming around or under the restoration.

however, glass ionomers are generally not recommended as a sedative base. a sedative base is typically used to provide a temporary calming effect on a tooth that has been irritated by decay or other dental procedures. materials used for this purpose need to be very soothing to the pulp and might require different properties than those provided by glass ionomers. materials like zinc oxide eugenol are more commonly used for this purpose due to their palliative effects on the pulp.

in conclusion, among the options provided - non-load bearing restorations, cavity liners, restoration for patients with high risk of recurrent decay, and sedative base - the use of glass ionomers as a sedative base is not an application for which these materials are typically employed in dental practice. the rest are well-established uses of glass ionomers in dentistry.