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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: 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: 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
Q: The image highlights which type of caries?
(A). Recurrent caries(B). Class Icaries(C). Class Vcaries(D). Class IVcariesThe magnifier points at a dark area “under” the restoration. Thosecariesthat come back after the tooth has been treated with restorations are calledrecurrentcaries. This is not uncommon, and therefore it is...  Read More
Q: The following drugs cause pupil dilation EXCEPT:
(A). Meth(B). Cocaine(C). LSD(D). MorphineKeyword: dilationThe pupil is constricted or dilated by the smooth muscle in theiris. Increased release of acetylcholine by theparasympatheticnervous system (rest and digest reaction) causescontractionof thecircularsmooth muscle. This makes the pupil (the...  Read More
Q: The critical pH for enamel demineralization is:
(A). pH 4.5-5.5(B). pH 5.5-6(C). pH 6-6.7(D). pH 7+Keyword: enamelFirst of all, what ispH? pH is the symbol ofhydrogen ion concentrationexpressed in numbers, corresponding to the acidity or alkalinity of an aqueous solution. The range is from 0 (pure acid) to 14 (pure base). Therefore, the lower...  Read More
Q: The cervical area has ____ vertebrae.
(A). 5(B). 7(C). 9(D). 12Keyword: cervical There are 7 cervical vertebrae. There are 12 thoracic vertebrae. There are 5 lumbar vertebrae. There are 4-5 modular pieces in the coccygeal that are fused. In adults, this segment may be fused with the sacrum.Answer: (B). 7When someone gets an...  Read More
Q: The arrows are pointing at:
(A). Fusion(B). Concrescence(C). Gemination(D). Dens indente Dens indente(also calleddensinvaginatus)isformed as the enamel organ goes into the crown of a tooth before mineralization is completed. Radiographically, a tooth-like structure appears within the crown. Due to the irregularities of the...  Read More
Q: Solar cheilitis is more common in:
(A). Immunocompromised patients(B). Dark-skinned adults(C). Patients undergoing cancer therapy(D). Fair-skinned adultsSolar cheilitis, also calledactinic cheilitisoccurs more commonly infair-skinnedindividuals. Here are some more characteristics(bullet point style, that's what we like at StudentRDH...  Read More
Q: The senses of the anterior third of the tongue are provided by which cranial nerve?
(A). Fifth(B). Ninth(C). Eighth(D). TwelfthKeywords: senses, anterior thirdThis is a very difficult question in my opinion. But we will dissect it together so you are more ready for the dental hygiene board exam (NBDHE, NDHCE). First of all, we know that there are12 cranial nerves, like a dozen...  Read More
Q: Probe depth is 7 mm, recession is 2 mm. What is the CAL?
(A). 2 mm(B). 5 mm(C). 7 mm(D). 9 mmKeyword: recessionClinical attachment level (or loss, CAL) is a more accurate indicator of the periodontal support around a tooth than probing depth alone. CAL is measured from a fixed point on the tooth that does not change, the CEJ.To calculate...  Read More
Q: Patients with artificial joints require premedication before dental treatments for:
(A). The first 6 months(B). The first 2 months(C). The first 2 years(D). Premedication is not indicatedThis is probably one of the most commonly asked questions by students at. At school, you may have been taught the “2 years, or for life” rule. Buttossthat! The newest guidelines from...  Read More
Q: The parotid gland secretes saliva through which duct?
(A). Wharton's duct(B). Stensen's duct(C). Bartholin's ductDucts are escape routes for the saliva and other types of secretion from glands. However, not all glands have ducts - some are ductless. Here is a summary of the major salivary glands and their ducts relevant to us #RDH #FutureRDH: ...  Read More
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