NDAEB Exam 2026/2027 – 130+ Questions & Answers | Dental Radiography, Oral Pathology, Impressions, Infection Control & Clinical Cases – National Dental Assisting Examining Board

This NDAEB Exam 2026/2027 study resource contains 130+ questions and answers across 26 pages, with focused preparation in dental radiography, oral pathology, clinical dental assisting, vital signs, impressions and dental materials, infection control, microbiology, periodontal care, dental trauma, and chairside procedures. The document combines direct knowledge questions with patient-based clinical scenarios, making it useful for reviewing both terminology and practical application. Early questions address the maxillary sinus as a radiographic landmark, lead-apron protection, brachial artery positioning for blood-pressure measurement, diagnostic casts, pellicle, bitewing radiographs, TMJ synovial fluid, amalgam handling, and sterilization. A major component is dental radiography and digital imaging. Students review the control panel, extension arm, tubehead, factors affecting X-ray beam quality and quantity, voltage, kilovoltage peak, amperage, milliamperage, exposure time, density, contrast, dental X-ray film composition, direct and indirect digital receptors, CCD sensors and phosphor storage plates (PSP). The radiographic anatomy section covers the incisive foramen, superior foramina, lateral fossa, median palatal suture, nasal cavity, nasal septum, floor of the nasal cavity, anterior nasal spine, and maxillary sinus, including whether structures appear radiopaque or radiolucent. The document includes several detailed clinical vignettes. One case concerns gingival recession and cervical abrasion with exposed dentinal tubules and potassium nitrate; another addresses a young heavy smoker with necrotizing periodontitis and heavy biofilm accumulation. A dental-trauma scenario reviews an avulsed permanent tooth, reimplantation, stabilization, and pulp capping, while an older-adult case connects rheumatoid arthritis and type II diabetes with xerostomia, root caries, gingival recession, the Bass sulcular brushing technique, and modified oral-hygiene aids. Students also encounter restorative, prosthodontic, and endodontic-style cases. The material reviews bridge preparation, mesial tooth drift, custom acrylic provisional restorations, alginate impressions, bridge units, pulp vitality testing, direct digital periapical radiographs, control teeth, cold testing, and irreversible pulpitis. Dental dam questions test recognition of common punching and placement errors, including a flat or excessively curved arch, oversized holes, excessive spacing, bunching, stretching, leakage, and tearing of the dam septa. Another substantial section covers vital signs and diagnostic procedures. Topics include temperature, pulse, respiration, blood pressure, radial and brachial arteries, normal ranges presented in the document, factors affecting vital-sign measurements, medical and dental histories, extraoral and intraoral examinations, radiographs, photographs, study models, and treatment planning. Students also review preliminary impressions, diagnostic models, custom trays, orthodontic appliances, provisional coverage, bite registrations, occlusal relationships, and centric relationships. The dental impressions and materials section provides extensive exam review of stock and custom trays, quadrant and sectional trays, utility wax, perforated trays, negative impressions and positive models, bite and triple trays, alginate, irreversible and reversible hydrocolloids, imbibition, syneresis, working and setting times, powder-to-water ratios, conditioning baths, polysulfide, polyether, silicone, polysiloxane, ZOE bite-registration paste, light-body material, and impression disinfection. This gives students a concentrated review of material properties and manipulation procedures used in dental assisting. Oral pathology and developmental conditions are another key focus. Questions cover erosion, abscesses, cysts, hematomas, ecchymosis, leukoplakia, candidiasis, aphthous ulcers, cellulitis, glossitis, geographic tongue, pernicious anemia, leukemia, carcinoma, hairy leukoplakia, Kaposi's sarcoma, lymphoma, macrognathia, torus palatinus, ankyloglossia, dens in dente, microdontia, gemination, ankylosis, dentinogenesis imperfecta, attrition, abrasion, and erosion associated with bulimia. This section is particularly relevant for students expected to recognize common oral lesions, abnormalities, and terminology. The final sections concentrate on microbiology and infection prevention. Students review cocci, bacilli, spirochetes, Gram-positive and Gram-negative organisms, aerobes, bacterial spores, prions, hepatitis, HIV, West Nile virus, H1N1, tuberculosis, tetanus, syphilis, pandemics, routes of contamination, droplet infection, standard precautions, blood-borne pathogen standards, hand hygiene, masks, gloves, immunization, and employee training records. The resource concludes with dental-office ergonomics and equipment, including the operator, transfer, assistant and static zones, nitrous oxide and oxygen cylinder colors, high- and slow-speed handpieces, gingivectomy, gingivoplasty, and pulp capping. The uploaded file identifies itself as “NDAEB EXAM 2026/2027 EXAM QUESTIONS AND ANSWERS | 100% PASS.” However, the document displays separate publisher/copyright information and does not establish that it is an official publication of the National Dental Assisting Examining Board. For an accurate student listing, it should therefore be presented as an NDAEB exam-preparation resource, without claiming official endorsement or guaranteeing a passing result. Relevant Students: This document is especially relevant to Canadian dental assisting students and NDAEB candidates preparing for the 2026/2027 examination period. It can also support dental assisting students reviewing radiography, digital imaging, oral pathology, microbiology, infection prevention and control, impressions, dental materials, vital signs, periodontal conditions, dental trauma, restorative assisting, chairside procedures, dental dams, and clinical patient scenarios. Keywords: NDAEB Exam 2026, NDAEB Exam 2027, NDAEB questions and answers, NDAEB practice questions, NDAEB study guide, NDAEB exam preparation, dental assisting exam, Canadian dental assistant exam, dental assisting questions and answers, dental radiography, digital radiography, dental X ray anatomy, bitewing radiograph, periapical radiograph, CCD sensor, phosphor storage plate, maxillary sinus, radiopaque landmarks, radiolucent landmarks, oral pathology, leukoplakia, candidiasis, aphthous ulcer, Kaposi sarcoma, dental infection control, dental microbiology, blood borne pathogens, standard precautions, Gram positive bacteria, Gram negative bacteria, hepatitis, HIV, dental impressions, alginate impression, hydrocolloid, polysulfide, polyether, polysiloxane, bite registration, diagnostic casts, dental vital signs, periodontal disease, necrotizing periodontitis, dental trauma, avulsed tooth, pulp vitality testing, irreversible pulpitis, dental dam errors, coronal polishing stains, dental assistant clinical cases, chairside dental assisting, dental assistant certification exam