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DHA Dental Hygienist (DHA-Hygienist) Practice Tests & Test Prep - Review



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DHA Dental Hygienist - Reviews


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See why our users from 154 countries love us for their exam prep! Including 160 reviews for the DHA Dental Hygienist 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 160 reviews

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DHA Dental Hygienist - Test Reviews Sample Questions

An adult patient has stain with a greenish color below the subgingival line. What is most likely?

Correct Answer:
subgingival calculus.


subgingival calculus is the most likely explanation for a greenish stain observed below the subgingival line in an adult patient. this type of dental calculus forms beneath the gum line and is a hardened plaque that has deposited on the teeth. subgingival calculus is common among adults and can often appear as a greenish or dark-colored stain.

the formation of subgingival calculus is primarily due to the accumulation of bacterial plaque that mineralizes with calcium and phosphate salts from saliva and gingival crevicular fluid. over time, if this plaque is not adequately removed, it hardens and adheres strongly to the teeth surfaces, particularly below the gum line.

this condition differs from supragingival calculus, which forms above the gum line and is generally easier to see and remove. subgingival calculus, being below the gum line, typically requires professional dental cleaning to be effectively removed. its presence can lead to periodontal problems such as gum inflammation, infection, and if untreated, can contribute to periodontitis, a serious gum disease that can result in tooth loss.

the coloration of subgingival calculus can range from brown to greenish due to the presence of various pigments produced by bacteria in the plaque, as well as from substances such as blood pigments that may be incorporated into the calculus as it forms. the greenish hue observed in this case is characteristic of subgingival calculus and not typically associated with other types of dental stains like yellow stain or extrinsic stains caused by foods, beverages, or smoking.

in summary, the likelihood of subgingival calculus being the cause of the greenish stain below the subgingival line in an adult is high, given its common occurrence in adults and its typical formation below the gingival line. regular dental check-ups and maintaining good oral hygiene are essential preventive measures against the formation of both supragingival and subgingival calculus.