NBDHE Dental Hygienist Practice Test Exam with 100% Correct Answers 2023, Exams of Dental surgery

Download NBDHE Dental Hygienist Practice Test Exam with 100% Correct Answers 2023 and more Exams Dental surgery in PDF only on Docsity! NBDHE Dental Hygienist Practice Test Exam with 100% Correct Answers 2023 Hypersensitivity of a root lessens as the tooth forms which of the following? a. Periodontal Ligament b. Pulp c. Cellular cementum d. Enamel - Correct answer c. Cellular cementum What nerve supplies the intrinsic muscles of the tongue? a. Trochlear b. Trigeminal c. Glossopharyngeal d. Hypoglossal e. Accessory - Correct answer d. Hypoglossal .Which of the following is the most radioresistant? a. Glands b. Reproductive organs c. Bone Marrow d. Skin e. Nerves - Correct answer e. Nerves Fluoride is typically introduced in all of the following ways except by ____________? a. Drinking water b. Vitamins c. Injection d. Toothpaste e. Mouthwash - Correct answer c. Injection Gingivitis is considered controlled when a. the gums reach the crown. b. no deep pockets appear in the gums c. the gums appear firm d. the plaque has been removed e. there's no bleeding around the gums - Correct answer e. there's no bleeding around the gums A flat stone may be used to sharpen a curette by hand. The face of the curette should be at what angle to the stone? a. 50-65 degrees b. 75-85 degrees c. 90-100 degrees d. 100-110 degrees e. 125-135 degrees - Correct answer d. 100-110 degrees Radiographic intensifying screens are used for a. magnification b. sharpening the image c. reducing the patient dose d. reflecting harmful rays e. expediting the processing time - Correct answer c. reducing the patient dose After an outbreak of herpetic gingivostomatitis, the herpes simplex virus may remain dormant in which of the following? a. Sensory ganglion b. Salivary Glands c. Blood d. Ligaments e. Lymph nodes - Correct answer a. Sensory ganglion Which of the following is a characteristic of an overdenture? a. No natural teeth remain b. Natural teeth remain c. Used with an overbite d. Used with an underbite e. Covers the denture - Correct answer b. Natural teeth remain A dental carie is another name for a _____________. a. Dental iinstrument b. The gum line c. Cavity d. Plaque build-up e. Gingivitis - Correct answer c. Cavity Which of the following is one of the main reasons for a root canal? a. tooth is cracked b. The pulp can't be fixed c. Gums are bleeding d. A cavity is present e. Enamel is worn off - Correct answer b. . The pulp can't be fixed Vital whitening is performed on which of the following? a. Dentures b. Tooth with no live nerve c. Tooth with live nerve d. Cavities e. Tooth roots - Correct answer c. Tooth with live nerve A vasoconductor does which of the following when used in conjunction with Lidocaine? a. Helps the drug get into the blood stream exp: A maximum of 2ml per arch, or 4ml total should be placed in a fluoride tray for application. A toxic dose is 5mg/kg for children. The hygienist prepares a solution for subgingival irrigation after the scaling and root planing procedure. Which of the following solutions is NOT a commonly used irrigant? a. Chlorhexidine digluconate b. Stannous Fluoride c. Listerine d. Povidone-iodine - Correct answer c. Listerine exp: Listerine is not a commonly used solution for subgingival irrigation following a periodontal procedure. The most common are 0.12% chlorhexidine, 0.4% stannous fluoride and 0.05% povidone-iodine. The hygienist then demonstrates a brushing method that places the bristles at the attached gingiva and sweeps them up apically, then sweeps over the gingiva and the tooth. What method is this? a. Combination b. Leonard c. Roll d. Stillman's - Correct answer c. Roll exp: The roll method involves brushing with the bristles at the gingival margin and sweeping them apically over the gingiva, then sweeping up over the gingiva onto the tooth. Which of the following is NOT true in regard to ADHD? a. Treatment may include stimulants b. May cause irritability and impulsiveness c. More common in girls d. Can make it difficult to acquire new skills - Correct answer c. More common in girls exp: ADHD is more common in boys. All of the other statements are correct. Which of the following appearances of gum tissue evident in the patient's mouth would be considered healthy? a. Soft b. Coral/pink c. Shiny with thin epithelial tissue d. Blunted - Correct answer b. Coral/pink exp: Healthy gums will appear coral pink in color. They are also firm, pointed in contour and have smooth margins. What is the most common type of implant? a. Endosteal b. Osseointergrated c. Subperiosteal d. Transosteal - Correct answer a. Endosteal exp: The patient received endosteal implants. They are the most common type of implant placed. The endosteal implant is surgically placed in the jawbone, whereas a subperiosteal implant is placed on top of the bone. Transosteal implants are primary used in edentulous patients. Osseointergration is the process on the bone growing around the implant. What type of brushing technique should one use with braces? a. Stillmans b. Bass c. Charters d. Modified Stillmans - Correct answer c. Charters exp: The best brushing technique for patients with braces is the Charters technique. This is done by placing the brush at 45-degree angle where the tooth and the tissue meet. The brush is swept toward the apex of the tooth in a circular vibrating motion followed by a rolling stroke toward the occlusal surface ORDER the following in accordance with Maslow's Hierarchy of Needs as they relate to identifying human needs and addressing them through personal or community involvement programs. -Safety and Security -Self -Self Esteem -Physiological Needs -Actualization -Social Needs - Correct answer 1. Physiological Needs 2. Safety and Security 3. Social Needs 4. Self Esteem 5. Actualization 6. Self What type of test compares actual results versus independent results? a. T-test b. Student's t test c. Chi square test d. Significance level - Correct answer c. Chi square test exp: The Chi square test compares actual results versus independent results and provides a comparison that measures the significance of observed and expected frequencies. In statistics, the p-value describes: a. Statistical significance b. Different means c. Variability in the sample groups d. How many subjects are needed to provide significance - Correct answer a. Statistical significance exp: In statistics, the p-value shows statistical significance, in that it represents the probability that a study could have come to a false conclusion. It shows the strength of the evidence about the population in question. The smaller the p-value, the more significant the findings of the study are considered. A small p-value (typically < 0.05) indicates strong evidence against the null hypothesis, so it can be rejected. A large p- value (typically > 0.05) indicates weak evidence against the null hypothesis, so its rejection fails. A p-value at or close to 0.05 is considered marginal, in that it could go either way. What type of motivation practice is used when there is the promise of a reward? a. External b. Internal c. Formal d. Informal - Correct answer a. External exp: External motivation is described as motivation derived from outside of the individual. Intrinsic motivation stems from the individual them self. What area should be palpated to determine if a blockage of sialoliths is present? a. Torus b. Wharton's duct c. Ranula d. Exostosis - Correct answer b. Wharton's duct exp: Wharton's duct is the submandibular salivary gland that should be palpated during an intraoral examination. This gland may become blocked with sialoliths, which would be present on an occlusal x-ray. Which portion of the x-ray tubehead performs collimation? a. PID b. Aluminum filter c. Focusing cup d. Target - Correct answer a. PID exp: The position indication device (PID) performs collimation of the x-ray beam to restrict the size of the beam. The PID is round or rectangular in shape. Regulations and federal law restrict the size of PID and tubehead devices. Which of the following options is NOT accurate? a. Aluminum filters must be no less than 1.5 mm thick for exposures below 70kVp b. Circular tubeheads must be no less than 2 3/4" in diameter c. Rectangular tubeheads must be no less than 1 3/8 by 1 3/4" in diameter d. PID lengths must be no less than 6" - Correct answer d. PID lengths must be no less than 6" exp: The statement that PID lengths must be no less than 6" is incorrect. PID lengths must actually be no shorter than 8", 12" or 16", depending on the type of beam. What is the most widely used and accepted tooth brushing technique? a. Charters b. Stillmans c. Bass d. Fones - Correct answer c. Bass exp: The bass method or modified bass method is the most common and most widely accepted tooth brushing technique, because it is suitable for everyone to use. Your toothbrush is placed at a 45-degree angle towards your gingival margin. This method cleans the sulcus and the cervical third area. It can be taught to periodontal maintenance patients and regular recall patients. What ethnicity has a higher prevalence of periodontal disease? a. Caucasian b. Hispanic c. African-American d. Pacific Islander - Correct answer c. African-American exp: African Americans have a higher prevalence of periodontal disease, with Hispanics coming in a close second. It is also more prevalent in men. Which is not a common manifestation of orthodontic treatment? a. Decalcification b. Aphthous ulcers c. Root resorption d. Gingival hypoplasia - Correct answer d. Gingival hypoplasia exp: Gingival hypoplasia is the incomplete development of tissue. Gingival hyperplasia is the enlargement or overgrowth of tissue, caused by plaque accumulation. The dentist wants you to take a panoramic x-ray to evaluate a joint two dimensionally. What type of x-ray is the panoramic? a. Intraoral b. Extraoral c. Interoral d. Periapical - Correct answer b. Extraoral exp: The panoramic x-ray is considered to be an extraoral x-ray. The film is on the outside of the mouth and exposed by rotating around the head of the patient. The patient often bites down on a stick for stability, but nothing else is placed inside of the oral cavity. What does the first number mean in a blood pressure reading? a. Systolic b. Diastolic c. Korotkoff sounds d. Blood pressure - Correct answer a. Systolic exp: The first number is the systolic reading. It reflects the amount of pressure that is required for the left ventricle of the heart to compress or push oxygenated blood into the blood vessels. Diastolic is the second number and it reflects the muscle at rest. When taking a bite-wing x-ray, you notice that the 2nd molar root tips are not in the x- ray. This is due to an abnormal curve in the roots of the tooth. What is this abnormality called? a. Dentinogenesis b. Dilaceration c. Hypodontia d. Gemination - Correct answer b. Dilaceration exp: Dilacteration occurs when a root curves or bends. This can make it hard to get periapical or bite-wing x-rays of a tooth. There is nothing clinically wrong with tooth. Is it recommended that smokers use alcohol based mouth rinses? a. Yes, to help control the bacteria in their oral cavity. b. Yes, to prevent periodontal disease. c. No, it puts the patient at higher risk of cancer. d. No, they should not use any form of mouth rinse. - Correct answer c. No, it puts the patient at higher risk of cancer. exp: Smokers have a higher risk of oral cancer when they use an alcohol based mouth rinse. This is due to the drying effect of the alcohol, creates a higher risk environment in the oral cavity. It is recommended that smokers use a non-alcoholic mouth rinse. What type of cell-to-cell attachments are found in enamel-forming ameloblasts? a. Hemidesmosome b. Tight junctions c. Desmosomes d. Gap junctions - Correct answer c. Desmosomes exp: Desmosomes are the cell-to-cell attachments in ameloblasts, which are responsible for forming tooth enamel. Which type of epithelia lines the oral cavity? a. Stratified squamous b. Simple squamous c. Stratified columnar d. Simple columnar - Correct answer a. Stratified squamous exp: The oral cavity tissues such as the buccal mucosa and gingival mucosa are lined with stratisfied squamous epithelia, the shorter, flatter squamous cells found in multiple layers at the surface of the oral cavity tissues. Decalcification and demineralization of tooth enamel begins at what pH? a. 3.3 b. 5.5 c. 6.6 d. 7.7 - Correct answer b. 5.5 exp: 5.5 pH is the acidic level at which decalcification and demineralization of tooth enamel begins to occur. What is the pharmaceutical dose that produces 50% of the maximum response in 50% of subjects? a. Lethal dose b. Log dose c. Effective dose d. Duration - Correct answer c. Effective dose exp: Effective dosages are the amount of a prescription drug dose that produce 50% of the maximum response of the expected outcome in 50% of the subjects taking the medication. When normal shedding of epithelium of the filiform lingual papilla does not occur, it produces thick layers of dead cells and keratin builds on the tongue surface: a. Geographic tongue b. Halitosis c. Black hairy tongue d. Melanin pigmentation - Correct answer c. Black hairy tongue exp: Black hair tongue is an accumulation of dead cells on the tongue that become stained by such things as food, tobacco, medicine and certain oral bacteria. At what pH is a root demineralized? a. 4.5-5.5 b. 5.5-5.9 c. 6.0-6.7 d. 6.5-7.4 - Correct answer a. 4.5-5.5 exp: Root structure is more likely to demineralize because of a high pH. Enamel demineralizes at a pH of 4.5-5.5. This makes the root surface more susceptible to decay. Which of the following is not a major component of saliva that helps protect against dental caries? a. Calcium b. Phosphate c. Iron d. Fluoride - Correct answer c. Iron exp: Iron is not a major component of saliva. However, there are trace amounts of the mineral that are found in saliva. A lack of iron in your diet could cause: angular cheilosis, burning tongue, or glossitis Which of the following is not a major salivary gland? a. Submandibular b. Sublingual c. Parotid d. Wharton - Correct answer d. Wharton The dentist wants to place a site-specific therapy at the distal of #16 that uses a drug implanted in a cord that will be placed and then removed 7-10 days later. What drug is this? - Correct answer Tetracycline The patient has a green stain on the facial surface of the upper anterior teeth. Which statement is true in regard to this type of stain? - Correct answer The stain is extrinsic and due to chromogenic bacteria The patient has supragingival calculus that covers more than 1/3 but less than 2/3 of the exposed teeth. What calculus rating does the hygienist assign in the patient's record? - Correct answer 2 The patient is assigned a plaque index of 2.1. This is considered: - Correct answer poor A plaque index of 2.0-3.0 is considered poor. As the patient demonstrates his flossing technique, which technique is improper and would need to be addressed through oral hygiene education? a. Wrapping the floss in a "c" shape around each tooth b. Sliding below the gingival margin, moving up and down c. Using unwaxed floss d. Snapping the floss through the contacts - Correct answer Snapping the floss through the contacts When demonstrating his tooth brushing method, the patient positions the bristles 45 degrees to the long axis of the tooth, toward the occlusal surface of the tooth. What brushing method is this? - Correct answer Charter's The hygienist then demonstrates a brushing method that places the bristles at the attached gingiva and sweeps them up apically, then sweeps over the gingiva and the tooth. What method is this? - Correct answer Roll The patient is very cooperative and is allowing you to look in her mouth. When trying to do your intraoral exam, you notice that the patient has tightening of skin around her mouth, making it hard for her to open wide. What is the cause? - Correct answer Scleroderma What is the proper way to clean a removable prosthesis in the dental clinic? - Correct answer Put denture in disinfectant, clean in an ultrasonic and brush with a denture brush Which of the following is not a material used in making a partial denture and denture teeth? - Correct answer Glass ionomer All of the following are soft tissue considerations regarding the use of a prosthesis, except: a. Angular cheilitis b. Stomatitis c. Traumatic ulcers d. Geographic tongue - Correct answer Geographic tongue The patient reports having some pain in her hand following her fall. All of the following would NOT be an appropriate modified brushing method for this patient? a. Use of an electric toothbrush b. Using the Fones brushing method c. Placing a large handle on the brush, such as a bike handle d. Having someone help her brush - Correct answer Using the Fones brushing method The patient has a white line-shaped lesion inside of the buccal mucosa. It is bilateral and keratinized. What is this most appropriate name for this lesion? - Correct answer Linea alba What medical conditions are the patient's prescriptions designed for? Aricept 10 mg/day Risperdal 4mg/day - Correct answer Dementia What is considered discrete data? - Correct answer Numeric variable If you accept a null hypothesis, you are saying that, statistically, there are no significant differences between population groups. It is tested by a statistical hypothesis test. - Correct answer Both statements are true What index is used to measure the past and present caries experience of a population? - Correct answer deft index When calculating research data, what is the term used to describe the most frequently occurring value in the data? - Correct answer Mode Approximately what percentage of adults has experienced root caries? - Correct answer 25% What drug is used to treat acute necrotizing ulcerative gingivitis? - Correct answer Metronidazole Which of the following is not an active ingredient in desensitizing toothpaste? a. Potassium nitrate b. Sodium citrate c. Carbamide peroxide d. Strontium chloride - Correct answer Carbamide peroxide Which diagnostic method of decay may NOT be appropriate for coronal smooth surface lesions? a. Bitewing x-rays b. DIAGNOdent c. QFL d. Clinical examination - Correct answer DIADNOdent A _________ object to film distance and ________ source to film distance decreases magnification of the image. - Correct answer Shorter; shorter When a doctor performs an exam at a 6-month reca ll, this can be considered __________ supervision. - Correct answer General What procedure involves removal of half of the tooth, including a portion of both the crown and root? - Correct answer Root hemisection A 55-year-old woman presents for a comprehensive exam with x-rays. After going over the health history with your patient, you begin to take her vital signs. After taking your patient's pulse, you begin to take the blood pressure with a stethoscope and manual blood pressure cuff. The patient's reading is 142/82. What does the first number mean in a blood pressure reading? - Correct answer Systolic Polishing the teeth for at least ____ with pumice may remove 3-4 micrometers of enamel. - Correct answer 3 minutes All of the following are reasons why the use of hydrogen peroxide is contraindicated in regular use, except: a. Sponginess of gingiva b. Root hypersensitivity c. Staining d. Demineralization - Correct answer Staining What is the ideal angle of instrumentation for calculus removal? - Correct answer 60-80 degrees What is the teratogenic effect? - Correct answer Relationship between maternal drug use and congenital abnormalities Most periodontal pathogens are __________ and _________. - Correct answer Gram negative, nonmotile All of the following patients have contraindications that would preclude the use of an air polisher EXCEPT one. Which one is the exception? a. A patient with exposed cementum b. A patient on a sodium restricted diet c. A patient with hypotension d. A patient with respiratory issues - Correct answer A patient with hypotension