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DHA Dental Technician - Reviews


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See why our users from 154 countries love us for their exam prep! Including 110 reviews for the DHA Dental Technician exam.

Exam Edge is an industry leader in online test prep. We work with institutional partners to offer a wide array of practice tests that will help you prepare for your big exam. No matter how niche your field of interest might be, we're here to help you prepare for test day.

   Excellent -- Based on 110 reviews

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DHA Dental Technician - Test Reviews Sample Questions

Beam alignment guides can help reduce patient exposure and retakes because they help prevent:

Correct Answer:
cone cuts.
beam alignment guides are crucial devices used in radiography, particularly in dental imaging, to ensure that the x-ray beam is precisely directed at the area of interest on the film or digital sensor. the primary benefit of using beam alignment guides is their ability to reduce the occurrence of cone cuts, which are a common problem in radiographic imaging.

cone cuts occur when the x-ray beam does not fully cover the film or sensor. this results in an incomplete image where part of the intended area is not exposed, leaving a blank section on the edge of the film or digital image. cone cuts are not only detrimental to diagnostic quality, as they may omit critical information, but they also necessitate retakes of the radiographic image. retakes increase the patient's exposure to radiation, which is always a concern in medical imaging due to the potential risks associated with cumulative radiation exposure.

by using a beam alignment guide, the technician is able to align the x-ray beam accurately with the film holder and the area of interest. this precise alignment helps ensure that the entire film or sensor is exposed to the x-ray beam, thereby avoiding cone cuts. as a result, the image produced is both diagnostically useful and complete, eliminating the need for retakes due to alignment errors. this not only conserves resources and time but also significantly reduces the patient’s exposure to additional radiation.

in summary, the use of beam alignment guides is a best practice in radiographic imaging that contributes to enhanced patient safety, improved quality of diagnostic images, and reduced wastage of resources. it helps prevent common issues such as cone cuts, thereby reducing the likelihood of retakes and minimizing unnecessary radiation exposure to the patient.

Dental amalgam is mixture of metals also called a(n):

Correct Answer:
alloy.
the question posed is about identifying the correct term for a mixture of metals, specifically referring to dental amalgam. the correct answer is "alloy."

an alloy is defined as a substance made by melting two or more elements together, at least one of them a metal. it exhibits metallic properties and constitutes a significant part of material science and engineering. alloys are used because they generally possess properties superior to those of their component elements. for instance, they may be stronger or more resistant to corrosion.

dental amalgam is a specific type of alloy commonly used in dentistry for dental fillings. it is primarily composed of mercury mixed with other metal powders such as silver, tin, copper, and sometimes zinc. the primary use of dental amalgam has been due to its durability, ease of application, and bacterial resistance, making it highly effective for restoring the structural integrity of teeth that have suffered decay.

however, the use of mercury in dental amalgam has brought some health and environmental concerns. mercury is known for its potential neurotoxic effects especially in vulnerable populations such as children and pregnant women. despite this, the levels of mercury released by amalgam fillings are generally considered too low to cause harm, according to various health agencies.

it is important to differentiate between terms like "alloy," "conglomerate," and "aggregate," which may appear in discussions of materials. an alloy, as mentioned, involves the combination of metals and possibly other elements to enhance properties. a conglomerate, on the other hand, is a mixture of various items, often not metals, and is more a geological or corporate term. an aggregate refers to a collection of items that are gathered together but remain separate in identity, often used in the context of construction materials like gravel and sand.

in conclusion, for the purpose of the question about dental amalgam, the correct terminology is "alloy." this term accurately describes the composition and the metallurgical nature of dental amalgam as a mixture of metals.