ADEX Trivia 4 — Questions and Answers
Question 1: Which vitamin deficiency is most closely associated with scurvy and impaired collagen synthesis affecting the periodontium?
- Vitamin A
- Vitamin B12
- Vitamin C (Correct answer)
- Vitamin D
Correct answer: Vitamin C
Vitamin C (ascorbic acid) is essential for collagen synthesis; its deficiency causes scurvy, which manifests as inflamed, bleeding gingiva.
Question 2: What is the average eruption age of the mandibular central incisors in primary dentition?
- 4–6 months
- 6–10 months (Correct answer)
- 12–16 months
- 18–24 months
Correct answer: 6–10 months
The mandibular central incisors are typically the first primary teeth to erupt, appearing around 6–10 months of age.
Question 3: Which type of epithelium lines the oral mucosa of the hard palate?
- Simple columnar
- Stratified squamous keratinized (Correct answer)
- Pseudostratified ciliated
- Simple cuboidal
Correct answer: Stratified squamous keratinized
The hard palate is covered by stratified squamous keratinized epithelium, which withstands the mechanical stress of chewing.
Question 4: What does the abbreviation 'OHI' stand for in dental hygiene practice?
- Oral Hygiene Index
- Oral Health Instruction (Correct answer)
- Oral Hygiene Intervention
- Oral Health Index
Correct answer: Oral Health Instruction
OHI stands for Oral Hygiene Instruction, which refers to patient education on effective plaque removal techniques.
Question 5: Which instrument adaptation technique places the terminal 1–2 mm of a curette against the tooth surface?
- Grasp adaptation
- Lateral pressure
- Toe-third adaptation (Correct answer)
- Fulcrum adaptation
Correct answer: Toe-third adaptation
Toe-third (or terminal third) adaptation ensures only the working end tip contacts the tooth to prevent soft tissue trauma.
Question 6: The legal document that grants a dental hygienist permission to practice is called a:
- Certification
- License (Correct answer)
- Permit
- Registration
Correct answer: License
A license is the legal credential issued by a state dental board that authorizes a dental hygienist to practice in that state.
Question 7: Which type of radiation has the HIGHEST energy in dental radiography?
- Infrared rays
- Visible light
- X-rays (Correct answer)
- Radio waves
Correct answer: X-rays
X-rays used in dental radiography have very short wavelengths and high energy, allowing them to penetrate soft and hard tissues.
ADEX Trivia 4
Which vitamin deficiency is most closely associated with scurvy and impaired collagen synthesis affecting the periodontium?