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NBDHE DENTAL HYGIENIST PRACTICE TEST QUESTIONS AND CORRECT
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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 - ANSWER c. Cellular cementum
What nerve supplies the intrinsic muscles of the tongue? a. Trochlear b. Trigeminal c. Glossopharyngeal d. Hypoglossal e. Accessory - ANSWER d. Hypoglossal
.Which of the following is the most radioresistant? a. Glands b. Reproductive organs c. Bone Marrow d. Skin e. Nerves - 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 - 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 - 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 - 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 - ANSWER c. reducing the patient dose
After an outbreak of herpetic gingivostomatitis, the herpes simplex virus may remain
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 - 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 - 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 c. A cavity d. A dead or dying tooth root e. Plaque build-up - 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 - 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 - ANSWER a. From a neighboring tooth
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 - 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 - 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
a. 1.0mg b. 0.5mg c. 0.01 mg d. 0.25mg - ANSWER a. 1.0 mg exp: 1.0 mg of weekly supplemental fluoride is the proper dosage for people ages 6-16.
Halitosis - ANSWER bad breath
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 - 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 - 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 - 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 - 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 - 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
- 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 - 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 - 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 - 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 - 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 - 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" - 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.
b. 7/ c. 11/ d. 13/14 - 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 b. Gingival c. Suprabony d. False - 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 - 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
d. Re-etch for a shorter amount of time - 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 - 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 c. Fraud d. On the job training - 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 - ANSWER d. Expressed consent
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 - 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 - 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 - 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. - 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 - 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 - 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. b. 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 - 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 - ANSWER d. Wharton exp: Warton's is a duct that is part of the submandibular gland. It is an opening for saliva and is not a major salivary gland.
What is the smallest permanent tooth in the mouth? a. Mandibular central incisors b. Maxillary canine tooth c. Mandibular lateral incisor d. Maxillary lateral incisor - ANSWER a. Mandibular central incisors exp: The mandibular central incisors are the smallest permanent tooth in the oral cavity. They are the smallest due to the fact that they have a very slight concavity with labial surfaces that are smooth.
The patient was born with a bilateral cleft lip on the right side. A cleft in this area occurs when what processes fail to fuse during fetal development? a. Frontonasal and stomadeum b. Frontonasal and maxillary c. Maxillary and medial nasal d. Medial nasal and frontonasal - ANSWER c. Maxillary and medial nasal exp: Failure of the maxillary and medial nasal processes to fuse during fetal development will result in cleft lip, or if severe enough, a cleft palate.
The patient asks why her remaining baby teeth have not fallen out yet. At what age do mandibular second bicuspids typically erupt? a. 9- b. 11- c. 13- d. 7-8 - ANSWER b. 11- exp: Mandibular second premolars typically erupt around the age of 11-12. Maxillary second bicuspids may erupt a year sooner.
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 - ANSWER c. More common in girls exp: ADHD is more common in boys. All of the other statements are correct.
What is a Dentigerous cyst? - ANSWER Cyst that originates around crown of unerupted tooth Dentigerous cysts are also called follicular cysts. They are always associated with the crown of an unerupted tooth.
