10 free, exam-style Integrated National Board Dental Examination (INBDE) (INBDE) practice questions with answers and explanations. No signup required. Work through them below, then take the full free INBDE practice test to study every exam domain.
The INBDE exam has 500 questions and runs 12 hours 30 minutes.
These 10 free INBDE questions are organized by exam domain, so you can see how each part of the Integrated National Board Dental Examination (INBDE) blueprint is tested. Reveal the answer and explanation under each question.
A patient reports spontaneous, throbbing pain that lingers for several minutes after a cold stimulus is removed and is now keeping them awake at night. The tooth responds exaggeratedly to cold, and the periapical radiograph shows a normal periapex. Which diagnosis is MOST consistent with these findings?
Correct answer: B - Symptomatic irreversible pulpitis
A patient's medication list includes phenytoin, metformin, lisinopril, and albuterol. The patient presents with generalized, firm, fibrotic enlargement of the interdental gingiva. Which medication is MOST likely responsible for this gingival finding?
Correct answer: D - Phenytoin
A 6-year-old presents with generalized thin, pitted enamel that appears normal in hardness but deficient in quantity, giving the teeth a small, widely spaced appearance. There is no history of fluoride excess or systemic illness, and both the parent and a sibling are similarly affected. Which condition is MOST likely?
Correct answer: B - Amelogenesis imperfecta
A healthy 70 kg adult is receiving 2% lidocaine with 1:100,000 epinephrine. Each 1.7 mL cartridge delivers 34 mg of lidocaine. Based on the absolute maximum recommended dose of lidocaine (500 mg per appointment), what is the greatest number of cartridges that may be administered before the lidocaine ceiling is reached?
Correct answer: C - Approximately 14 cartridges
A patient with a prosthetic heart valve requires an extraction and reports a true penicillin allergy (previous anaphylaxis). According to the 2021 American Heart Association guidance, which regimen is now considered appropriate for infective endocarditis prophylaxis?
Correct answer: B - Azithromycin 500 mg orally one hour before the procedure
During a soccer game, a 10-year-old's maxillary permanent central incisor is knocked completely out of the socket. A parent calls the office within minutes for advice while driving to the clinic. If the tooth cannot be replanted immediately, which is the MOST appropriate readily available medium in which to transport it?
Correct answer: C - Cold milk
Mid-appointment, a healthy adult patient suddenly becomes pale and diaphoretic, reports feeling lightheaded, and then briefly loses consciousness in an upright dental chair. After confirming the airway is patent and the patient is breathing, what is the MOST appropriate immediate step?
Correct answer: D - Position the patient supine with the legs slightly elevated
Using the 2017 World Workshop classification of periodontal diseases, which parameter is used to determine the GRADE (A, B, or C) of periodontitis, as opposed to determining the stage?
Correct answer: D - The rate of progression and risk factors such as smoking and diabetes
A dentist wants to base a treatment decision on the strongest available evidence for whether a new caries-prevention agent works. Which source represents the HIGHEST level in the evidence hierarchy?
Correct answer: A - A systematic review with meta-analysis of randomized trials
A patient asks the dentist to leave a suspicious oral lesion out of the referral note because they do not want their physician to know about it. The dentist explains they must document and communicate the finding honestly. This obligation to be truthful in records and communication reflects which ethical principle?
Correct answer: D - Veracity
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