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DANB's CPFDA (CPFDA) Practice Tests & Test Prep by Exam Edge


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DANB CPFDA Practice Test Features

Everything you need to pass your certification exam!


The more you know about the DANB's CPFDA exam the better prepared you will be! Our practice tests are designed to help you master both the subject matter and the art of test-taking to be sure you are fully prepared for your exam.

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DANB's Certified Preventive Functions Dental Assistant Sample Test

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What is more effective at removing heavy build of calculus?





Correct Answer:
ultrasonic scaler.


calculus, commonly referred to as tartar, is a hard deposit that forms on teeth when plaque is not removed effectively. removing calculus is a critical step in maintaining oral hygiene and preventing gum disease. there are two primary tools used for removing calculus: sickle scalers, curettes (both manual tools), and ultrasonic scalers.

ultrasonic scalers are highly effective in removing heavy buildups of calculus due to their advanced technology. these devices utilize ultrasonic vibrations to break down calculus deposits. the tip of the ultrasonic scaler vibrates at a high frequency and when applied to the tooth surface, it disrupts the hard calculus, efficiently breaking it down. this method is particularly advantageous for removing harder, thicker layers of calculus that manual scalers might struggle with.

in contrast, manual tools like sickle scalers and curettes require physical scraping to remove calculus. sickle scalers have a pointed tip and are used primarily for the removal of calculus from the crowns of the teeth. curettes, on the other hand, are used mainly for root scaling, to remove calculus from the root surfaces below the gum line. while these tools are effective for finer, detailed scaling and are indispensable in a dental hygiene toolkit, they require more physical effort and are generally less efficient at removing dense, heavy calculus compared to ultrasonic scalers.

after using an ultrasonic scaler, a dental professional may follow up with manual scalers. this is because manual scaling can help in fine-tuning the cleaning process, allowing the hygienist to reach areas that may be less accessible to the ultrasonic scaler or where finer, meticulous scaling is necessary. this combination ensures a thorough cleaning, enhancing the overall effectiveness of the calculus removal process.

therefore, while both ultrasonic and manual scalers are essential for comprehensive dental cleaning, the ultrasonic scaler stands out as more effective for removing heavy and thick calculus buildups. its ability to quickly and efficiently break down tough calculus, with less discomfort for the patient, makes it a preferred choice in many dental care settings for initial calculus removal.


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