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Q: Which instrument is NOT a critical item?
(A). Curettes(B). Surgicalburs(C). Scalpels(D). Mouth mirrorsThis question belongs to the chapter on Infection Control at(for the NBDHE, NDHCE). Critical itemsare items considered to be athighrisk for infections. Theypenetratethe soft tissue, bone, or contact the blood stream. Therefore,...  Read More
Q: Which injection anesthetizes the maxillary posterior teeth?
(A). Inferior alveolar nerve block(B). Posterior superior alveolar nerve block(C). Middle superior alveolar nerve block(D). Greater palatine nerve blockKeyword: teeth Posterior superior alveolar (PSA) nerve block: anesthetizes the maxillary first/second/third molars, periodontal tissues, buccal...  Read More
Q: Which heart condition requires premedications?
(A). Calcified aortic stenosis(B). Rheumatic heart disease(C). Ventricular septal defect(D). Artificial heart valvesThe conditions that require antibiotics prior to dental care according to the most recent American Heart Association guideline (2012) are: Cardiac transplantthat develops cardiac...  Read More
Q: Which drug falls under pregnancy category B?
(A). Carbocaine(B). Marcaine(C). Citanest(D). SeptocaineThe question needs to be solved in 2 parts: The answer choices show brand names of drugs, but what are their generic names? Let’s memorize them here: Citanest (prilocaine), Xylocaine (lidocaine), Carbocaine (mepivacaine), Marcaine...  Read More
Q: Which condition is NOT caused by a virus?
(A). Hand-foot-mouth disease(B). Herpes labialis(C). Infectious mononucleosis(D). Candidiasis Candidiasisis caused by thefungusCandida albicans. Herpeslabialis is caused by a group ofvirusescalled human herpes viruses. Hand foot mouth diseaseis caused by the Coxsackievirus. Infectious...  Read More
Q: Which of the following is a facial bone?
(A). Occipital(B). Parietal(C). Sphenoid(D). Zygomatic(E). FrontalThere are 22 bones in the skull (8 cranial bones and 14 facial bones), excluding the middle ear ossicles.8cranialbones: occipital bone 2 temporal bones 2 parietal bones sphenoid bone ethmoid bone frontal...  Read More
Q: Which bacteria are mainly involved in caries formation?
(A).Streptococcussalivarius(B).Streptococcusmutans(C).Streptococcussanguis(D).PorphyromonasgingivalisKeyword: cariesThe mouth is colonized by 200 to 300 bacterial species, but only a limited number of these species participate in dental decay (caries) or periodontal disease. ...  Read More
Q: Where are the lingual tonsils located?
(A). Posterior to the circumvallate lingual papillae(B). On lateral border of the tongue(C). Along the sulcusterminalisof the tongue(D). Spread evenly on the entire surface of the tongueThere are different types of tonsils and papillae on the tongue: Lingual tonsilsare an irregular mass of...  Read More
Q: When is a package considered to be contaminated?
(A). When it is dropped on the floor(B). When it is punctured(C). When it is wet(D). All of the aboveBefore opening a dental instrument package, examine it carefully chair side. Packages that are dropped on the floor, punctured,torn,or wet are considered contaminated. In those events, repackage and...  Read More
Q: Which radiographic error caused this “flat” smile?
(A). Lead collar is above the line(B). The chin is tipped down too far(C). The chin is tipped up too far(D). The patient’s head is twistedThewill show you panoramic radiographs and ask you what type of error was made. There is a whole list of errors that you need to memorize! As we know,...  Read More
Q: What is the main function of the incisors in mastication?
(A). Grinding food(B). Mastication of food(C). Cutting food(D). Tearing foodOur teeth have different functions according to their location: Incisors: biting and cutting food Canines: piercing and tearing food Posteriors: mastication and grinding foodAnswer: (C). Cutting foodTo memorize...  Read More
Q: What is the active ingredient of doxycycline?
(A). Arestin(B). Periochip(C). AtridoxAll the agents mentioned above are the most commonly-usedlocally-appliedantimicrobial agents. They are used only after periodontal therapies have shown unsuccessful results (studies suggest that adjunct therapy alone does not improve periodontal health).Adjunct...  Read More
Q: What is Borax?
(A). Retarder(B). Accelerator(C). None of the aboveGypsum is a soft sulfate mineral composed of calcium sulfate dihydrate. It can be used as a fertilizer, chalk, or stone for the fabrication of models in dentistry. Borax and potassium sulfate can be added to the gypsum tomodify the setting speed. ...  Read More
Q: What happens in the depolarization of a nerve?
(A). Sodium ions exit the nerve membrane(B). Sodium ions enter the nerve membrane(C). Both sodium ions and potassium ions enter the nerve membrane(D). Both sodium ions and potassium ions exit the nerve membraneKeyword: depolarizationNerve conduction (and recovery) follows the steps of...  Read More
Q: Which disease is related to severe protein deficiency and is characterized by edema?
(A). Kwashiorkor(B). Phenylketonuria(C). Marasmus(D). Addison’s diseaseKeywords: edema, protein deficiencyThe definitions for the answer choices are as follows: Kwashiorkor: severe protein deficiency; begins aroundage 2. Symptoms include apathy, failure to grow and gain weight,...  Read More
Q: What disease is related to adrenal insufficiency?
(A). Celiac sprue(B). Addison’s disease(C). Cushing's syndromeBefore we dive into the details, what is “adrenal?” You may have heard about it, but there are so many organs in the body. Here are some definitions from.Theadrenalglands are small,triangularglands located on top of...  Read More
Q: Using radiation measuring system conversion, 1 Gray is equal to how many rad?
(A). 100(B). 300(C). 1000(D). 1,000,000When measuring radiation, there are two types of systems used –Standard(traditional system) andSystem International(SI, newer system). Roentgen (Standard system), Coulomb (C/kg) (SI system): measure the exposure (quantityof ionization in the air). The...  Read More
Q: This unusual incisor shape is most likely caused by:
(A). Syphilis(B). Attrition(C). Erosion(D). FluorosisThe maxillary central incisors in this image feature an unusual indentation which is characteristic ofcongenital syphilis. Those malformed incisors are called “screwdriver-shaped” incisors. Besides abnormal incisors, congenital...  Read More
Q: This type of swelling is a(n):
(A). Ranula(B). Mucocele(C). Exostosis(D). UlcerThe image shows a rounded elevation that looks like it may contain some fluid and is located on thelower lip. Amucoceleis a benign, mucus-containing cystic lesion of theminorsalivary gland. It can appear with any minor salivary glands, but the most...  Read More
Q: The recommended amoxicillin premedication dose for an adult patient is:
(A). 300 mg(B). 500 mg(C). 600 mg(D). 2 gKeyword: adult2 g ofamoxicillin1 hour prior to the dental appointment is the recommended premedication dose for anadultpatient. Other drugs and doses for premedication are as follows: 600 mg clindamycin 500 mg azithromycin 500 mg clarithromycinWhat...  Read More
Q: The receptor size usually required for a full-mouth series on a six-year-old patient is:
(A). Size 1(B). Size 0(C). Size 3(D). Size 4Keywords: six-year-old Size 0 is the smallest receptor and is used for children Size 1 is larger than size 0 and is used for children’s dentition and adult anterior teeth Size 2 is larger than size 1 and is used on adults (BWX and PA) ...  Read More
Q: The radiolucency in the image is:
(A). Oral ulcer(B). Mandibular foramen(C). Mental foramen(D). Incisive foramenIn order to solve this, we have to examine thelocationof the radiolucency. In this image, it isbelow the second premolarbut detached from the root. Because it isdetachedfrom the roots, we already know that it is NOT a...  Read More
Q: The patient in the photo has:
(A). Geographic tongue(B). Oral candidiasis(C). Median rhomboid glossitis(D). Smooth tongueGeographic tongue and median rhomboid glossitis… For some reason, the two get mixed up in our head sometimes. Let’s review them a little more closely today and perfect our knowledge about oral...  Read More
Q: The mental nerve block anesthetizes the:
(A). Lingual gingiva of the mandible(B). Facial gingiva of the mandibular anterior teeth(C). Buccal gingiva of the mandibular molars(D). All teeth posterior to the mental foramenThe mental nerve is a terminal branch of the inferior alveolar nerve that exits through themental foramenlocated on the...  Read More
Q: What is the largest cranial nerve?
(A). First(B). Seventh(C). Sixth(D). FifthThere are 12 cranial nerves: olfactory (I), optic (II), oculomotor (III), trochlear (IV), trigeminal (V), abducens (VI), facial (VII), vestibulocochlear (VIII), glossopharyngeal (IX), vagus (X), accessory (XI), and hypoglossal (XII).Among all of those,...  Read More
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