NBDHE Dental Hygienist Practice Test Questions And Answers, Exams of Dental surgery

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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

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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

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d. 100-110 degrees e. 125-135 degrees - correct answer d. 100- 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

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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

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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 b. Helps the numbing drug work c. Helps the drug resist breaking down d. Makes the numbness wear off e. Makes the numbness last longer - correct answer e. Makes the numbness last longer When a periapical abscess forms, it indicates what? a. The gums are infected b. Tooth enamel is worn thin

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c. A cavity d. A dead or dying tooth root e. Plaque build-up - correct answer d. A dead or dying tooth root If a dentist is placing a bonded filling, she will do which of the following to ensure the filling bonds to the tooth? a. X-ray the tooth b. Scrape the tooth c. Polish the tooth d. Etch the tooth e. Drill the tooth - correct answer d. Etch the tooth A pedicle graft uses a flap of tissue from which part of the mouth? a. From a neighboring tooth b. From the roof of the mouth c. From the inside cheek d. From any location it can be found e. From the bottom of the mouth - correct answer a. From a neighboring tooth

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Where does the bone for a bone augmentation typically comes from in an implantation procedure? a. Tibia b. Radius c. Chin or Ramus d. Hip e. Humerus - correct answer c. Chin or Ramus A veneer will correct all of the following except? a. Slightly crooked teeth b. A tooth with a cavity c. Chipped teeth d. Gaps between teeth e. Teeth with different lengths - correct answer b. A tooth with a cavity Patients should give informed consent to all dental procedures. Which of the following is not a part of informed consent? a. Informing patients of the risks of treatment b. Patient's agreement to care c. Having a discussion of the treatment options with the

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patient d. Getting the patient's or guardian's signature e. Obtaining a dental history of the patient - correct answer e. Obtaining a dental history of the patient While reviewing brushing techniques, the patient exhibits the method that she uses. She brushes with the bristles aimed toward the gingival margin and then rolls the brush toward the occlusal surface. What method is this? a. Fones b. Roll c. Leonard d. Charters - correct answer b. Roll exp: The Roll method of brushing starts with the bristles at the gum margin and then rolls the brush toward the incisal or occlusal surfaces. During oral hygiene instruction, the hygienist discloses the patient's teeth with an agent that stains new and mature plaque in red and blue tints. What type of agent does she use? a. Erythrosin b. Disclosing tablet

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c. Two-tone disclosing solution d. Bismarck Brown - correct answer c. Two-tone disclosing solution exp: Two-tone disclosing solutions will stain new plaque red and mature plaque blue, that way oral hygiene instruction can address areas in the mouth that have developed plaque buildup due to inefficient brushing over time. The patient lives in a rural area and has a well as her water source. There is no natural fluoridation of the water in the area. The hygienist recommends a weekly supplemental dosage of fluoride. What is the proper dosage for the patient's age? a. 1.0mg b. 0.5mg c. 0.01 mg d. 0.25mg - correct answer a. 1.0 mg exp: 1.0 mg of weekly supplemental fluoride is the proper dosage for people ages 6-16. Halitosis - correct answer bad breath

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When preparing the fluoride tray for a gel application, what is the maximum amount of gel that should be placed in the fluoride tray? a. 4ml b. 8ml c. 2ml d. 12ml - correct answer a. 4ml 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.

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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

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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

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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

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-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

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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

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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

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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. A diabetic patient arrives having just taken their insulin, but only ate a very light lunch due to having a dental procedure scheduled. During the appointment the patient begins experiencing headache and shakiness. What should the practitioner do? a. Administer nitrous oxide

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b. Wait until the patient feels better to continue the treatment c. Ask the patient to take more insulin - correct answer d. Have the patient drink a soda exp: Have the patient drink a soda or juice, or have another sugar-containing snack due to a low level of blood sugar. After administering the sugar, monitor the patient. A diastema between #8 and 9 is marked by: a. One vertical red line between 8/ b. Two vertical red lines between 8/ c. One "v" drawn between 8/ d. Two horizontal red lines between 8/9 - correct answer b. Two vertical red lines between 8/ exp: Two vertical red lines placed between teeth #8 and 9 on a dental chart indicate a diastema between the two teeth. Which diagnostic method of decay may NOT be appropriate for coronal smooth surface lesions? a. Bitewing x-rays b. DIAGNOdent

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c. QFL d. Clinical examination - correct answer b. DIAGNOdent exp: DIAGNOdent diagnosis for decay is not appropriate for use on smooth coronal surface lesions. It is for use only in suspected pit and fissure lesions on the occlusal surfaces. Which of the following Gracey area-specific curettes would be appropriate to use on the mesial of posterior teeth? a. 3/ b. 7/ c. 11/ d. 13/14 - correct answer c. 11/ exp: A Gracey 11/12 would be appropriate to use on the mesial of posterior teeth, as would a Gracey 15/16. A 13/14 would only be used on the distal surfaces. Other curettes listed would be for use in the anterior teeth. Which type of pocket is generated by an apical migration of the junctional epithelium? a. Periodontal

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b. Gingival c. Suprabony d. False - correct answer a. Periodontal exp: Periodontal pockets are the result of loss of junctional epithelium in an apical direction, indicative of bone loss. Which condition can be a result of an allergic reaction? a. Pemphigus vulgaris b. Necrotizing ulcerative gingivitis c. Aggressive periodontitis d. Desquamative gingivitis - correct answer d. Desquamative gingivitis exp: Desquamative gingivitis may be due to a serious systemic disease, but it can also be caused by an allergic reaction. It appears as sloughing tissues that leave red, raw areas in the mouth. If a tooth becomes wet due to saliva contact during sealant preparation, what is the next correct step? a. Use air/water syringe to re-rinse and dry the tooth b. Use air/water syringe to dry the tooth c. Re-etch for the full amount of time

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d. Re-etch for a shorter amount of time - correct answer d. Re-etch for a shorter amount of time exp: Re-etching the tooth for a shorter amount of time is enough to re-condition the dental tubules after salivary contamination during a sealant prep. Simply drying the tooth is not enough because saliva has come into contact with the pores of the tooth and will disrupt retention of the sealant. Light curing typically occurs within ________. a. 15-seconds b. 20-30 seconds c. 45-60 seconds d. 90-seconds - correct answer b. 20-30 seconds exp: Sealant material typically cures within 20-30 seconds of exposure to the curing light. Always be sure to check the sealant for under-curing after the procedure is finished. Training dental personnel to perform dental hygiene duties is known as ___________. a. Preceptorship b. Extended duties

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c. Fraud d. On the job training - correct answer a. Preceptorship exp: Preceptorship is when dental personnel are trained to perform dental hygiene duties in an office setting. This is currently limited to only very few areas and is not widely accepted. What type of consent is given in writing or verbally? a. Informed refusal b. Informed consent c. Implied consent d. Expressed consent - correct answer d. Expressed consent exp: Expressed consent may be written or verbal, but documenting the consent in writing helps to protect the practitioner and patient at a greater level. What is the most widely used and accepted tooth brushing technique? a. Charters b. Stillmans c. Bass d. Fones - correct answer c. Bass

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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

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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

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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.