NDHCE Cheat Sheet 2026

The 30 highest-yield NDHCE facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. What is the function of the inferior alveolar nerve (IAN) in dental procedures? → Provides sensory innervation to the mandibular teeth, lower lip, and chin
2. What type of waste is generated when a dental hygienist disposes of extracted teeth with amalgam restorations? → Amalgam waste requiring special disposal
3. Fordyce spots in the oral cavity represent which anatomical variant? → Sebaceous glands without associated hair follicles
4. Which clinical parameter is considered the gold standard for diagnosing active periodontal disease progression? → Clinical attachment loss (CAL)
5. The rubber dam is used during dental procedures primarily to: → Isolate the operative field and reduce aerosol contamination
6. Which screening tool used in dental hygiene practice assesses a patient's oral health literacy? → REALD-30 or NVS (Newest Vital Sign)
7. How should a contaminated dental bur be disposed of after use on a patient? → Placed in a sharps container (puncture-resistant)
8. Which ionizing radiation unit measures the biological effect of radiation on human tissue? → Rem (Sievert)
9. Which pathological process describes irreversible pulpal necrosis resulting from ischemia after traumatic injury to the tooth? → Pulp necrosis
10. Which radiographic appearance is most consistent with a periapical abscess? → Diffuse radiolucency at the root apex
11. A dental hygienist records a gingival recession of 2 mm and a probing depth of 4 mm. What is the clinical attachment loss (CAL)? → 6 mm
12. Which feature differentiates a pyogenic granuloma from an irritation fibroma clinically and histologically? → High vascularity and tendency to bleed
13. The parotid salivary gland's duct (Stensen's duct) opens into the oral cavity at which location? → Buccal mucosa opposite the maxillary second molar
14. During an extraoral examination, the dental hygienist palpates a hard, non-movable lymph node in the neck. What is the clinical significance of this finding? → Possible malignancy requiring immediate referral
15. Which of the following is a common sign of gingivitis? → Gingival bleeding
16. The nasopalatine nerve, which is anesthetized during a nasopalatine nerve block, innervates which area? → Anterior hard palate and lingual gingiva of maxillary anterior teeth
17. During fixer processing, what is the primary chemical action on the exposed radiographic film? → Removes unexposed silver halide crystals
18. What is the first step in developing a treatment plan for a dental hygiene patient? → Reviewing the patient's medical history
19. Which federal program provides dental care coverage for children from low-income families in the United States? → CHIP (Children's Health Insurance Program)
20. Which dental condition would appear radiopaque on a radiograph? → Amalgam restoration
21. Which type of cyst is derived from the reduced enamel epithelium and surrounds the crown of an unerupted tooth? → Dentigerous cyst
22. Which autoimmune blistering disease is characterized by suprabasilar acantholysis and positive Nikolsky's sign in the oral cavity? → Pemphigus vulgaris
23. Which oral health measure is considered the most cost-effective public health intervention for preventing dental caries on a population level? → Community water fluoridation
24. Which nerve provides the primary sensory innervation to the maxillary teeth and surrounding structures? → Maxillary nerve (V2)
25. A radiograph appears too light (underexposed). Which of the following is the most likely cause? → Insufficient exposure time
26. What does the acronym ALARA stand for in radiation protection? → As Low As Reasonably Achievable
27. What is the primary purpose of prescribing antibiotics in a dental setting? → To prevent or treat infections
28. Which of the following personal protective equipment (PPE) is required during aerosol-generating dental procedures? → Gloves, mask, eye protection, and gown
29. During a comprehensive dental hygiene assessment, which index measures the accumulation of supragingival calculus? → Calculus Index (CI)
30. Which of the following conditions is a potential complication of untreated periodontitis? → Tooth loss