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200 NBDHE Mock Board Questions And Answers 2024
Sensory impulses from a toothache are likely to be transmitted on - ANS-✔✔cranial nerve V
Viruses can be distinguished from all other microorganisms by virtue of their - ANS-✔✔possession of only one type of nucleic acid
Too little vertical angulation when taking radiographs will result in - ANS-✔✔elongation
Which of the following describes a Class I furcation involvement? - ANS-✔✔A slight concavity is detectable, but no radiolucency is visible on the radiograph
Systemic diseases can be associated with periodontal disease, since they can affect immune functions, inflammatory response and tissue organization. These include the genetic disorders - ANS-✔✔Chediak- Higashi syndrome, Papillon-Leferve syndrome, and hypophosphatasia
Kaposi's sarcoma is MOST commonly located on the - ANS-✔✔palate
Which of the following could be used for removal of burnished tenacious calculus in deep, narrow pockets with firm, fibrotic tissue - ANS-✔✔periodontal file
Oral manifestations of bulimia include all of the following, EXCEPT one. Which one is the EXCEPTION? - ANS-✔✔Leukoedema
Subgingival calculus receives its mineral content from - ANS-✔✔gingival crevicular fluid
A dense, fibrous, raised, skin-colored lesion located on the buccal mucosa at the height of the occlusal plane is MOST likely a - ANS-✔✔fibroma
The appearance of spongy rolled gingival margins and bulbous gingival papilla is the result of - ANS-✔✔ accumulation of tissue fluid
When radiographs are being duplicated, the duplicating film is placed closest to the light source. The greatest density of the duplicated image will occur with the longest exposure to the light source. - ANS- ✔✔Both statements are false
Periodontal debridement of the maxillary left quadrant requires administration of a local anesthetic. Which nerve block injection will NOT provide anesthesia to the area? - ANS-✔✔Inferior alveolar
Proper ultrasonic scaling technique is BEST described by which of the following? - ANS-✔✔Light stroke pressure and multidirectional strokes
Infection of a primary tooth may cause - ANS-✔✔Turner's spot
Alginate impressions are displaced from the mouth in a quick continuous movement to prevent - ANS-✔ ✔distortion of the impression
The main part of the facial nerve leaves the temporal bone in the facial canal through the - ANS-✔✔ stylomastoid foramen
Facial asymmetry is commonly associated with - ANS-✔✔Bell's palsy
A predominant bacterium in chronic periodontitis is - ANS-✔✔P. gingivalis
A person with a history of oral herpes lesions of the lip feels a tingly sensation. The person should do all of the following, EXCEPT one. Which one is the EXCEPTION? - ANS-✔✔Spend more time in the sun
accumulation interproximal. Failure on the part of the patient to follow instructions given by the dental hygienist is an example of - ANS-✔✔contributory negligence
Zinc polycarboxylate cements are used to bond enamel. Their advantage over zinc phosphate cements is their adhesive property with calcium and carboxylate groups. - ANS-✔✔Both statements are true
A well-defined red band of marginal gingiva adjacent to a base metal crown is likely to be caused by all of the following, EXCEPT one. Which one is the EXCEPTION? - ANS-✔✔Food impaction
When evaluating the relationship between sugar in the patient's diet and level of decay, the most important factor to determine in the patient's diet diary is - ANS-✔✔the frequency of sugar consumed
All of the following are true regarding powered toothbrushes, EXCEPT one. Which one is the EXCEPTION? - ANS-✔✔Removes more dental biofilm than a manual brush
When an infrabony periodontal pocket forms, the junctional epithelium - ANS-✔✔is apical to the crest of the alveolar bone
Utilizing G.V. Black's lesion classification system, a Class III lesion would involve the - ANS-✔✔proximal surface of a central, lateral, or canine tooth
Patients taking antihistamines for allergy symptoms may exhibit - ANS-✔✔sedation
Alcoholism is treated pharmacologically with - ANS-✔✔disulfiram (Antabuse)
The initial vascular response during acute inflammation is initiated by the release of - ANS-✔✔ histamine
The following are major causes of temporomandibular joint disorder, EXCEPT one. Which one is the EXCEPTION? - ANS-✔✔trimus
Which one of the following collimator types can MOST effectively reduce scatter radiation to the patient? - ANS-✔✔Rectangular
Sufficient frictional heat can be generated by rubber cup polishing to cause discomfort to a patient. Frictional heat from the rubber cup can be controlled (reduced) by use of a light touch, rapid patting or sweeping motion, high speed, and wet abrasive agent. - ANS-✔✔The first statement is true, the second is false
When radiographs are taken during the first dental visit of a 5-year-old with clinical signs of decay and anterior crowding, the bitewing radiographs should be exposed before the occlusal films. Positioning for the mandibular occlusal radiograph requires that the patient's head be tipped back approximately 90 degrees. - ANS-✔✔Both statements are false
When suspecting abuse of a child or dependent adult, what should the dental hygienist do first? - ANS- ✔✔Report suspicions to the local authorities such as Social Services
On the day an HIV-positive patient is scheduled for an oral prophylaxis, the dental hygienist feigns illness and goes home. This is an example of - ANS-✔✔unethical conduct
A radiographic sign of periodontal breakdown is the presence of - ANS-✔✔fuzziness of the alveolar crests
Which of the following microorganisms has been shown to predominate in localized aggressive periodontitis? - ANS-✔✔A. actinomycetemcomitans
Immune protection of mucous membranes from infection is most closely associated with - ANS-✔✔IgA antibodies
The dental hygienist has been asked to discontinue instrument sharpening because of cost concerns. All of the following are concerns associated with use of dull instruments, EXCEPT one. Which one is the EXCEPTION? - ANS-✔✔Infection control
All of the following are true to pit and fissure sealants, EXCEPT one. Which one is the EXCEPTION? - ANS- ✔✔Indicated when proximal decay exists
The MOST important thing to remember when sharpening instruments chair side is - ANS-✔✔to use a sterile stone
Oral irrigants are effective for all of the following, EXCEPT one. Which one is the EXCEPTION? - ANS-✔✔ Removing attached dental biofilm
Of the following teeth, which one is MOST frequently congenitally missing? - ANS-✔✔Maxillary lateral incisor
During an extraoral examination, swollen lymph nodes are detected beneath the chin. Which lymph nodes are these? - ANS-✔✔Submental
The maximum accumulated dose of radiation that a 38-year-old dental hygienist should receive is - ANS- ✔✔100 Rem
The ideal angle for insertion of a curette into a periodontal pocket in preparation for a scaling stroke is - ANS-✔✔0 degrees
The need to increase the dose of a drug to produce the same drug effect is called - ANS-✔✔drug tolerance
An isolated port-hole defect in bone that exposes the underlying root of the tooth is referred to as a - ANS-✔✔fenestration
Blood-soaked gauze is considered biomedical waste an must be sterilized or incinerated. Blood- and saliva-contaminated gloves must be washed before being discarded in the trash. - ANS-✔✔The first statement is true, the second is false
The triceps brachia muscle functions to straighten (extend) the elbow joints. The muscle - ANS-✔✔ inserts on a bone of the forearm, the ulna
Treatment for xerostomia in a patient may include - ANS-✔✔cholinergics
For which emergency listed below would it be better NOT to use oxygen? - ANS-✔✔Hyperventilation
Candida albicans is known or suspected to cause all fo the following denture-related problems, EXCEPT one. Which one is the EXCEPTION? - ANS-✔✔Epulis fissuratum
A patient completing a two-week regimen of amoxicillin for a periodontal abscess complains of a sore mouth. The examination reveals a thick white coating on the palate and buccal mucosa. This coating is most likely - ANS-✔✔candidiasis
Stenosis of the bicuspid valve is likely to initially cause a backup of blood in the - ANS-✔✔left atrium, pulmonary veins, and lungs
All of the following affect image sharpness, EXCEPT one. Which one is the EXCEPTION? - ANS-✔✔ Exposure time
Embryonic cells trapped in fusion lines during facial development may become - ANS-✔✔cysts
A patient is a hepatitis B carrier. Which one of the following is an appropriate way to prevent cross- contamination? - ANS-✔✔Avoiding use of ultrasonic scaler
Professional treatment of root dentinal hypersensitivity may include all of the following, EXCEPT one. Which one is the EXCEPTION? - ANS-✔✔Zinc-oxide eugenol
When a radiograph is only partially immersed in developer but fully immersed in fixer, the resultant processed film will exhibit a black area. Radiographs that are inadequately rinsed after fixing will develop yellow-brown stains later. - ANS-✔✔The first statement is false, the second is true
Which of the following palpation technique best describes bidigital palpation? - ANS-✔✔Tissues are grasped between finger(s) and thumb to examine tissues
An infrabony pocket in which the facial and lingual alveolar bone is missing is classified as a(an) - ANS-✔ ✔two-walled pocket
For removal of a heavy ledge of calculus on the lingual surface of the mandibular anterior teeth, which of the following is the best tip and power combination? - ANS-✔✔Standard tip at medium to high power
Polishing of amalgams helps prevent corrosion and improves longevity of amalgam restorations. Overheating of the amalgam during polishing can result in damage to odontoblasts. - ANS-✔✔Both statements are true
Endogenous intrinsic stain is associated with all of the following, EXCEPT one. Which one is the EXCEPTION? - ANS-✔✔caries
Nicotine stomatitis presents in the oral cavity as - ANS-✔✔tiny nodules with red center and diffuse grayish white coating
Following posterior superior alveolar nerve block injection, a patient complains of inadequate "numbing" and receives additional cartridges of 2% lidocaine with 1:100,000 epinephrine. The patient begins to tap incessantly, exhibits restlessness and becomes drowsy, and then suffers a convulsion. These symptoms are MOST likely a(an) - ANS-✔✔toxicity reaction to the local anesthetic agent
Sulcular epithelium is generally - ANS-✔✔nonkeratinized
A newly processed radiograph appears light. this is most likely due to - ANS-✔✔cold developing solution
Cushing's syndrome is associated with obesity, hirsutism, and moon face. This condition is caused by - ANS-✔✔overproduction of adrenocorticotropic hormone (ACTH)
A patient requires a prophylactic antibiotic regimen due to a history of infective endocarditis. He is allergic to penicillin and takes warfarin (Coumadin). The American Heart Association (AHA) regimen of choice for this patient is - ANS-✔✔clindamycin (Cleocin)
Opsonins are - ANS-✔✔molecules that stimulate phagocytosis
If a deposit of calculus is difficult to remove with an ultrasonic scaler, which of the following should be adjusted? - ANS-✔✔Power level
Which of the following conditions is NOT associated with tongue thrusting? - ANS-✔✔Gingival recession
Essential amino acids are defined as such because they - ANS-✔✔cannot be synthesized by the body
Patients with fixed orthodontic appliance often need extensive instruction in dental biofilm control methods to remove the more virulent bacterial dental biofilm they develop. A daily self-applied fluoride
When the hygienist is placing a periodontal dressing over a surgical site, the pack material should be pressed into the inter proximal spaces. No pack material should be placed above the height of contour of the teeth. - ANS-✔✔Both statements are true
Which vitamin deficiency during pregnancy may contribute to a spinal birth defect in the infant? - ANS- ✔✔Folate
Which of the following is noted during finals week with stressed college-students that involves a bacterial infection with oral ulceration, pain, and fever. - ANS-✔✔Necrotizing ulcerative gingivitis
A structure that is composed of polysaccharide molecules and is responsible for adherence of bacteria to surfaces such as teeth is called a - ANS-✔✔glycocalyx
What viral disease exhibits fever, lymphadenopathy, malaise, and palatal petechiae? - ANS-✔✔ Mononucleosis
A malignant tumor with etiology directly related to exposure to sunlight is a(an) - ANS-✔✔basal cell carcinoma
All of the following are true about anaphylaxis, EXCEPT one. Which one is the EXCEPTION? - ANS-✔✔ Occurs only in adults
Signs, symptoms, and side effects of type 1 diabetes mellitus include all of the following, EXCEPT one. Which one is the EXCEPTION? - ANS-✔✔Rapid weight gain and increased salivation
The swelling associated with an infection involving the lingual of a maxillary second molar is often located in the submental space. Ludwig's angina is a cellulitis that can be caused by the speed of a dental infection from the submental space. - ANS-✔✔The first statement is false, the second is true
Proper control of infection when the hygienist is producing a study model requires - ANS-✔✔ disinfection of the impression
Hutchinson's triad is a result of congenital infection with - ANS-✔✔Treponema pallidum
In a class II, Division II occlusion, which of the following would be present within the dentition? - ANS-✔ ✔One or more maxillary anterior teeth would be retruded, and the mandible would be retruded
The initial vascular response during acute inflammation is initiated by the release of - ANS-✔✔ histamine
Which one of the following bacteria influences root caries? - ANS-✔✔Actinomyces viscosus
When a tooth is etched for sealant placement, primary teeth are etched for a longer period than are permanent teeth. Rinsing a saliva-contaminated etched surface immediately before sealant placement will remove the contamination - ANS-✔✔The first statement is true, the second is false
The dental biomaterial bis-GMA is the - ANS-✔✔resin in pit and fissure sealants
During exploratory strokes made with either a curette or explorer, the modified pen grasp should be kept very light so that the hygienist can feel the vibration created as the instrument moves over the tooth. There is a correlation between the tightness of the grasp on the instrument and the amount of lateral pressure applied against the tooth. - ANS-✔✔Both statements are true
Which one of the following is a coating material on dental implants that improves bonding with bone? - ANS-✔✔Hydroxyapatite
For a mandibular removable partial denture with calculus on the anterior replacement teeth, the preferred method of professional cleaning would be to - ANS-✔✔use an ultrasonic bath with a tartar remover solution
John was concerned and went to his physician, since he could not shake what he thought was the flu. He tested negative for HIV 6 months after an exposure to the virus. When he was tested again 6 months later, however, the results were positive. If an error, the first test result was - ANS-✔✔false negative
A collimator on an x-ray unit - ANS-✔✔restricts the size of the x-ray beam
Purpura in the oral cavity describes a - ANS-✔✔reddish purple discoloration
On a mandibular first molar, a furcation is located in the - ANS-✔✔cervical third of the root, buccally
Magnification on dental radiographs can be decreased by - ANS-✔✔increasing the source-object distance
The process of copying genetic information from DNA to RNA is called - ANS-✔✔transcription
Accurate shadow casting requires meeting all of the following rules, EXCEPT one. Which one is the EXCEPTION? - ANS-✔✔Greatest tooth-film distance
Use of an air-polish is contraindicated because of the possible systemic absorption of sodium bicarbonate for patients with all of the following conditions, EXCEPT one. Which one is the EXCEPTION? - ANS-✔✔Immunosuppression
Providing the patient active involvement in treatment decisions is an example of - ANS-✔✔autonomy
At the post treatment evaluation following initial debridement therapy of 12 periodontal pockets of 5 to 6 mm depth, two areas of bleeding are found. The next step should be - ANS-✔✔retreatment of bleeding areas and reevaluation in a month
After quadrant scaling, the patient is unable to close his jaw and complains of severe pain. This condition is called - ANS-✔✔subluxation
Which of the following situation can ensure that the instruments are being properly sterilized in the dental office? - ANS-✔✔Biological indicators test negative
Which of the following gypsum products has the lowest compressive strength? - ANS-✔✔Type I
Immediate (Type I) hypersensitivity is associated with all of the following, EXCEPT one. Which one is the EXCEPTION? - ANS-✔✔Release of T cell chemical mediators
The number of furcation's in a maxillary first molar is - ANS-✔✔three
When a patient experiences a seizure, all of the following should be done, EXCEPT one. Which one is the EXCEPTION? - ANS-✔✔Restrain the patient to minimize movement
One of the following medications does not cause gingival hyperplasia. Which one is the EXCEPTION? - ANS-✔✔Diuretics
Epstein-Barr virus is the causative agent in verruca vulgaris and condyloma acumminatum. Surgical excision is the primary treatment modality. - ANS-✔✔The first statement is false, the second is true
The calculus-controlling ingredient in some tartar control dentifrices is - ANS-✔✔pyrophosphate
Which salts deposit in bacterial dental biofilm to form calculus - ANS-✔✔Phosphate and calcium
When a patient is being transferred from a dental chair to the wheelchair the dental chair should be how far from the wheelchair? - ANS-✔✔The same height as or slightly lower than the wheelchair
Which one of the following statements regarding the subgingival environment is TRUE? - ANS-✔✔ Nutrients for subgingival dental biofilm are derived from crevicular fluid and blood products
All of the following instrument types should be avoided on dental implants, EXCEPT one. Which one is the EXCEPTION? - ANS-✔✔Plastic instruments
T lymphocytes are - ANS-✔✔bound to antigens with their membrane-associated T-cell receptor
A retrognathic jaw position with anterior overbite is referred to as - ANS-✔✔Class II, division I
Which of the following best describes effective adaptation of the curette against a tooth surface? - ANS- ✔✔Toe third of the blade contacts the tooth at all times
Testlet 1
The city homeless shelter houses 559 adults males, 124 adult females, and 97 children under the age of 18 years. Fewer than 2% of sheltered adults hold full-time employment. City officials have recently implemented an employment-training project for the homeless. Based on results of a survey of prospective employers, the project will provide participants with assistance in reading and writing skills, resume and interview preparation, personal hygiene, appropriate attire, and working skills. Several dental hygienists and dentist have volunteered to assess the oral health needs of the project participants using the OHI-S.
The OHI-S is used to measure all of the following, EXCEPT one. Which one is the EXCEPTION? - ANS-✔✔ Demineralization
Every 9th adult listed on the alphabetized roster of shelter residents will be selected for assessment of oral hygiene needs. This sampling method is known as - ANS-✔✔systematic
All project participants received a toothbrush and dentifrice. What is the MOST efficient way to provide oral hygiene instructions to participants? - ANS-✔✔Lecture and demonstration
After watching a toothbrushing demonstration the residents will be able to perform the modified Stillman's toothbrushing technique. The "condition element" of this objective is - ANS-✔✔after watching a toothbrushing demonstration
A resident's behavior is modified when the resident - ANS-✔✔habitually brushes and flosses daily
Nearly 46% of project participants gained full-time employment within 3 months of project completion. Eighty-two percent of those remained employed for at least 2 years. This is an example of project - ANS- ✔✔evaluation
The BEST measure of the effect of an oral health program is - ANS-✔✔health improvement
Testlet 2
A middle-school administrator is concerned about the increased frequency of cigarette smoking among the sixth through eighth grade students in her school. She asks her dental hygienist to develop a program for raising the awareness of the dangers of smoking. To determine the current level of smoking behavior and awareness of the danger of smoking, the dental hygienist asked each student in the seventh grade to answer a six-item questionnaire. Two weeks later, the dental hygienist gave a presentation on the general and oral health dangers of cigarette smoking to all seventh grade students. Two weeks following the presentation, the seventh grade students were given a questionnaire containing the same items as on the pre-test.
