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DANB's MDG (MDG) Practice Tests & Test Prep by Exam Edge - Topics

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Understanding what is on the DANB's MDG exam is crucial step in preparing for the exam. You will need to have an understanding of the testing domain (topics covered) to be sure you are studying the correct information.

  • Directs your study efforts toward the most relevant areas.
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There is no doubt that this is a strategic step in achieving certification and advancing your career.

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DANB's Maryland General Dental Assisting - Exam Topics Sample Questions

A temporary restoration requires which of the following attributes in order to demonstrate appropriate fabrication?

Correct Answer:
correct proximal contacts

a temporary dental restoration, often referred to as a temporary crown or bridge, plays a crucial role in dental treatment plans, particularly during procedures that require more than one visit to complete. these restorations are used to protect the tooth and maintain its function and aesthetics while a permanent restoration is being fabricated. for a temporary restoration to serve its purpose effectively, it must exhibit certain key attributes. among these, correct proximal contacts stand out as particularly critical.

correct proximal contacts refer to the contact points between the temporary restoration and the adjacent teeth. these contacts are essential for several reasons. firstly, they help to maintain the correct spacing between teeth, preventing adjacent teeth from drifting into the space. this drift can lead to misalignment and affect the fit of the final, permanent restoration. secondly, proper proximal contacts ensure that the forces exerted during chewing are distributed correctly, which helps in the stabilization of the temporary restoration and reduces the risk of it becoming dislodged.

furthermore, correct proximal contacts aid in the protection of the underlying tooth structure and the surrounding gum tissue. they help in preventing food particles from becoming trapped between the temporary restoration and the adjacent teeth, which can lead to discomfort and increase the risk of decay and gum disease. additionally, these contacts contribute to the overall aesthetics of the temporary restoration, ensuring that it blends seamlessly with the natural teeth in terms of appearance.

in summary, while other factors such as accurate tooth contour, appropriate occlusal contacts, and a good fit to the preparation margins are also important, correct proximal contacts are essential for the functionality, stability, and protective qualities of a temporary dental restoration. ensuring these contacts are correct is a key step in the assessment and verification of a properly fabricated temporary restoration. this not only supports the health of the oral environment but also provides comfort and confidence to the patient during the interim period before the permanent restoration is placed.

Which of the following composite restorative materials is the strongest? 

Correct Answer:

composite restorative materials are widely used in dentistry for repairing or restoring teeth. these materials are categorized based on the size of the filler particles they contain, which can significantly influence their physical properties, such as strength and wear resistance. the main types of composite materials include microfilled, midifilled, nanofilled, and macrofilled composites. each type is suited to different dental applications depending on the required aesthetics and mechanical properties.

microfilled composites consist of very small filler particles. this gives them a smoother finish and makes them excellent for anterior (front) tooth restorations where aesthetic appearance is paramount. however, their mechanical strength and resistance to wear are lower compared to other types of composites.

midifilled composites are designed to offer a balance between strength and aesthetic quality. they contain filler particles that are larger than those in microfilled composites but smaller than those in macrofilled composites. these are generally used where both aesthetics and strength are important.

nanofilled composites are a newer category and utilize nanosized filler particles. these composites provide superior aesthetics and have good mechanical properties. the very small size of the filler particles allows for a highly polished, smooth surface with enhanced aesthetic qualities and good strength, making them suitable for both anterior and posterior restorations.

macrofilled composites contain the largest filler particles among the composite types. this aspect makes them the strongest and most wear-resistant, ideal for posterior (back) teeth which undergo greater forces during chewing. because of their larger filler particles, macrofilled composites are less able to achieve the smooth and highly polished surface that smaller particle composites can, potentially making them less suitable for visible areas but ideal for areas requiring strength.

in conclusion, when considering which composite restorative material is the strongest, macrofilled composites stand out. they are specifically designed to withstand high masticatory forces, making them the preferred choice for posterior teeth restorations where durability and resistance to wear are critical. however, for front teeth or areas requiring a superior aesthetic finish, other types of composites such as microfilled or nanofilled might be more suitable despite their lower mechanical strength relative to macrofilled composites.