NDAEB Exam 2026/2027 – 180+ Questions & Answers | Dental Radiography, Medical Emergencies, Anesthesia, Dental Dams, Implants & Endodontics – National Dental Assisting Examining Board

This NDAEB Exam 2026/2027 study resource provides 180+ questions, answers, definitions, and applied review items across 36 pages for dental assisting exam preparation. Its key areas include dental radiography and radiation safety, periodontal disease, restorative materials, vital signs, impressions, medical emergencies, local anesthesia, sedation, moisture control, dental dams, dental implants, and endodontic procedures. The document opens with periodontal disease, amalgam composition, the ALARA radiation-safety concept, and the positive anode and negative cathode of the dental X-ray tube before moving into an extensive radiography review. Dental radiography is one of the document's most extensively covered subjects. Students review film, phosphor storage plates and digital sensors as image receptors; purposes of dental X-rays; dental radiography; the tubehead, extension arm and control panel; X-ray tube; position-indicating device (PID); lead collimator; aluminum filtration; wavelength; kilovoltage; milliamperage; beam intensity; contrast; radiopacity and radiolucency; sharpness; penumbra; magnification; and distortion. The guide also examines factors influencing image quality, dental-film components, digital-sensor infection control, radiation-sensitive tissues, latent images, film speed, secondary radiation, ionization, and radiation protection. The radiography review continues with film processing and technique selection. Questions address developer and fixer solutions, automatic processing, processing errors, fogged films, extraoral film, bitewings, paralleling and bisecting techniques, horizontal and vertical angulation, edentulous-patient imaging, extraoral radiography, TMJ images, CBCT, MRI, and lead-apron protection. The material also reviews radiographic interpretation concepts such as alveolar bone height, caries, hypercementosis, impacted mandibular third molars, and radiolucent lesions. Another major section concentrates on patient assessment and vital signs. The document reviews heart rate, respiratory rate, blood pressure, oxygen saturation, body temperature, the sphygmomanometer, Korotkoff sounds, pulse measurement, and correct patient-arm positioning during blood-pressure measurement. Impression and restorative topics include bite and occlusal registrations, syringe or wash material, silicone putty, elastomeric impressions, polysulfide, alginate working time, Mylar matrix strips, Class III and Class IV restorations, cavity preparation, and amalgam restoration procedures. The medical-emergency section provides concentrated preparation on recognizing and responding to conditions encountered in dental practice. Topics include anaphylaxis, asthma, CPR, convulsions, epilepsy, erythema, hyperglycemia, hypoglycemia, hypersensitivity, hyperventilation, myocardial infarction, syncope, pregnancy-related loss of consciousness, angina pectoris, diabetes, leukemia, seizures, and diabetic ketoacidosis. The document repeatedly emphasizes knowing the patient's needs and medical history as part of preventing emergencies and reviews emergency-related medications and interventions such as nitroglycerin, bronchodilators, and epinephrine. A detailed anesthesia and sedation section reviews nitrous oxide, vasoconstrictors, topical anesthetics, local anesthetic duration, aspirating syringes, sharps disposal, oximetry, tidal volume, titration, induction, amide and ester anesthetics, epinephrine ratios, infiltration, needle lumen and gauge, aspiration, abscesses, and paresthesia. Students are also introduced to the relationship between maxillary cancellous bone and infiltration anesthesia and the purpose of aspiration before depositing anesthetic solution. The clinical-assisting material then moves to oral evacuation, moisture control, and dental dam isolation. Students review saliva ejectors, high-volume evacuators (HVE), operative and surgical suction tips, HVE grasps, cotton rolls, dry angles, dental dams, Stensen's duct, plastic and metal dental dam frames, water-soluble lubricants, dental dam punches, clamps, anchor teeth, and one-step versus two-step placement. The guide also tests common dental dam errors, including an incorrectly punched arch, oversized holes, holes positioned too close together, and holes placed too far apart. The final portion provides valuable review of dental implants and endodontics. It distinguishes endosteal, subperiosteal, and transosteal implants, discussing their positioning, indications, healing, materials, and maintenance. Endodontic material includes the number of radiographs identified in the source for an endodontic procedure and the functions of K-type files, reamers, Hedström files, broaches, Gates-Glidden instruments, and Peeso files, along with irrigating solutions listed as sodium hypochlorite, hydrogen peroxide, and parachlorophenol. The document is best treated as a third-party NDAEB exam-preparation resource rather than an official examination publication. Although its title references the NDAEB, the file itself displays separate publisher/copyright information and does not establish that the questions were issued or endorsed by the National Dental Assisting Examining Board. The listing should therefore avoid implying official NDAEB authorship or endorsement. Relevant Students: This resource is particularly relevant to Canadian dental assisting students and NDAEB examination candidates preparing for the 2026/2027 exam period. It is also useful for dental assisting students who need focused revision of dental radiography, radiation protection, medical emergencies, patient vital signs, impressions, restorative procedures, local anesthesia, sedation, moisture control, dental dam isolation, dental implants, endodontics, infection control, and chairside assisting procedures. 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