Free NDEB Assessment of Clinical Judgement Practice Questions

Sample Practice Questions

Try these 10 sample questions from the NDEB Assessment of Clinical Judgement practice bank. Each includes the answer and explanation. Continue with the interactive practice above to review the full question set.

1. 1During examination, a patient has bilateral fine, slightly raised, lacy white striae on the buccal mucosa. Which diagnosis best fits this pattern?

   1. A.Oral lichen planusCorrect answer: A
   2. B.Chronic candidiasis
   3. C.Frictional keratosis
   4. D.Oral leukoplakia

   Explanation: AAOM Oral Lichen Planus states: "The reticular pattern (see right) is commonly found on the cheeks as lacy web-like, white threads that are slightly raised." The reticular pattern explains the buccal striae; the competing white lesions lack this characteristic lacework.

   Reference: AAOM Oral Lichen Planus — Appearance in the Mouth

2. 2Four adults are scheduled for periodontal instrumentation involving gingival manipulation. Which cardiac history supports infective-endocarditis antibiotic prophylaxis under AHA/ADA guidance?

   1. A.A coronary artery stent
   2. B.Isolated controlled hypertension
   3. C.A prosthetic cardiac valveCorrect answer: C
   4. D.An implanted cardiac pacemaker

   Explanation: ADA Antibiotic Prophylaxis Prior to Dental Procedures states: "prosthetic cardiac valves, including transcatheter-implanted prostheses and homografts;" A prosthetic valve is a high-risk condition. A coronary stent, pacemaker or hypertension alone is not a qualifying valve/endocarditis condition.

   Reference: ADA Antibiotic Prophylaxis Prior to Dental Procedures — Patient Selection

3. 3A dentist wants an adjunctive method to detect and monitor early caries without exposing the patient to ionizing radiation. Which technology meets that requirement?

   1. A.Digital bitewing radiography
   2. B.Periapical film radiography
   3. C.Laser fluorescenceCorrect answer: C
   4. D.Cone-beam computed tomography

   Explanation: The ADA identifies nonionizing detection aids: "Examples of detection technologies for which this code might be applicable are laser fluorescence, transillumination or a combination of noncontacting modulated laser luminescence and photothermal radiometry." Laser fluorescence provides the requested optical adjunct. Bitewing, periapical and cone-beam radiographic techniques use ionizing radiation; changing the receptor to a digital one does not remove that exposure.

   Reference: ADA Caries Risk Assessment and Management — Newer Detection Technologies

4. 4In staging periodontitis, most teeth show limited attachment loss, but one tooth has substantially greater periodontitis-related interdental attachment loss. Which measure primarily determines the severity score?

   1. A.The mean attachment loss across all teeth.
   2. B.The loss at the worst-affected tooth.Correct answer: B
   3. C.The loss at the most recently erupted tooth.
   4. D.The median attachment loss across all teeth.

   Explanation: EFP Periodontitis: Guidance for Clinicians states: "It is assigned based on the worst-affected tooth." Staging severity uses the worst-affected tooth rather than averaging away severe disease.

   Reference: EFP Periodontitis: Guidance for Clinicians — p. 6, Scoring the stages

5. 5A deeply carious permanent molar has spontaneous pain and an exaggerated cold response that lingers after the stimulus is removed. Percussion is normal. Which pulpal diagnosis best fits?

   1. A.Reversible pulpitis
   2. B.Pulp necrosis
   3. C.Symptomatic irreversible pulpitisCorrect answer: C
   4. D.Previously initiated therapy

   Explanation: AAE Endodontic Diagnosis states: "Characteristics may include sharp pain upon thermal stimulus, lingering pain (often 30 seconds or longer after stimulus removal), spontaneity (unprovoked pain) and referred pain." Spontaneous lingering thermal pain supports symptomatic irreversible pulpitis even before apical percussion tenderness develops.

   Reference: AAE Endodontic Diagnosis — p. 3, Symptomatic Irreversible Pulpitis

6. 6A child has a posterior crossbite accompanied by a mandibular functional shift. When should the functional shift be corrected according to AAPD guidance?

   1. A.After eruption of the permanent canines.
   2. B.At completion of the pubertal growth spurt.
   3. C.Soon after the functional shift is identified.Correct answer: C
   4. D.After eruption of the second permanent molars.

   Explanation: AAPD Management of the Developing Dentition and Occlusion states: "Functional shifts should be eliminated as soon as possible with early correction" Early correction aims to avoid asymmetric function/growth; waiting for pain or completed growth is not the stated approach.

   Reference: AAPD Management of the Developing Dentition and Occlusion — p. 506, Crossbites, treatment considerations

7. 7A biopsy has confirmed erosive oral lichen planus in a patient whose lesions hurt during meals. Which topical drug class is generally used to control this form?

   1. A.Topical antifungal agents
   2. B.Topical antiviral agents
   3. C.Topical corticosteroidsCorrect answer: C
   4. D.Topical antibacterial agents

   Explanation: AAOM Oral Lichen Planus states: "The erosive and ulcerative forms can usually be controlled with the use of topical corticosteroids." This is symptomatic erosive inflammatory disease, so topical corticosteroids target it; the other classes treat infectious conditions.

   Reference: AAOM Oral Lichen Planus — Q: What treatment is necessary for oral lichen planus?

8. 8A patient with previous infective endocarditis needs several dental services. Which planned procedure meets the tissue-manipulation criterion for antibiotic prophylaxis?

   1. A.Periodontal scaling involving gingival manipulationCorrect answer: A
   2. B.Dental radiographs with routine receptor placement
   3. C.Adjustment of a removable orthodontic appliance
   4. D.Routine placement of orthodontic brackets

   Explanation: ADA Antibiotic Prophylaxis Prior to Dental Procedures states: "Prophylaxis is recommended for the patients identified in the previous section for all dental procedures that involve manipulation of gingival tissue or the periapical region of the teeth, or perforation of the oral mucosa." Gingival instrumentation meets the criterion; radiography and routine appliance/bracket work do not.

   Reference: ADA Antibiotic Prophylaxis Prior to Dental Procedures — Dental Procedures

9. 9When comparing current and prior radiographs of an adolescent's permanent molar, which finding supports a decision to intervene restoratively?

   1. A.Radiographic progression of the carious lesion.Correct answer: A
   2. B.An unchanged narrow enamel radiolucency.
   3. C.A stable radiopaque restorative margin.
   4. D.An unchanged outline of a sealed fissure.

   Explanation: AAPD Pediatric Restorative Dentistry states: "radiographic recognition of progression of lesions." Progression is a listed criterion informing restorative decisions, unlike stable findings without progression.

   Reference: AAPD Pediatric Restorative Dentistry — p. 474, When to restore

10. 10A periodontitis patient initially appears to have a moderate progression rate, but poorly controlled type 2 diabetes is documented. How can this risk factor affect grading?

    1. A.It can increase progression risk and therefore raise the grade.Correct answer: A
    2. B.It can increase disease extent from localized to generalized.
    3. C.It can increase the anatomic stage without further tissue loss.
    4. D.It can increase the count of teeth lost to periodontitis.

    Explanation: EFP Periodontitis: Guidance for Clinicians states: "the assumption of a moderate rate of progression (grade B) is modified by the presence of poorly controlled Type-2 diabetes, which is a risk factor that could shift the grade definition to rapid progression (grade C)." Risk modifiers can raise grade independently of the observed primary progression criterion; they do not replace the full assessment.

    Reference: EFP Periodontitis: Guidance for Clinicians — p. 7, Grading