Teeth Whitening Teeth Terminology 2 — Questions and Answers
Question 1: What is the term for the junction where the tooth meets the gum line?
- Cementoenamel junction
- Gingival margin (Correct answer)
- Dentinoenamel junction
- Periodontal ligament
Correct answer: Gingival margin
The gingival margin is the edge of the gum tissue that borders the tooth at the gum line.
Question 2: Which layer of the tooth is directly beneath the enamel?
- Cementum
- Pulp
- Dentin (Correct answer)
- Periodontal ligament
Correct answer: Dentin
Dentin lies directly beneath the enamel and makes up the bulk of the tooth's structure.
Question 3: What does the term 'intrinsic staining' mean in dentistry?
- Stains on the outer enamel surface
- Stains embedded within the tooth structure itself (Correct answer)
- Stains from food and drink
- Stains removable by polishing
Correct answer: Stains embedded within the tooth structure itself
Intrinsic stains are incorporated into the dentin or enamel during tooth development or after trauma.
Question 4: What is 'dentin hypersensitivity' in the context of whitening?
- Allergic reaction to bleaching gel
- Pain or discomfort from exposed dentin tubules (Correct answer)
- Darkening of dentin after treatment
- Hardening of dentin from peroxide
Correct answer: Pain or discomfort from exposed dentin tubules
Dentin hypersensitivity occurs when exposed dentinal tubules allow stimuli to reach the nerve, causing sharp pain.
Question 5: What is the clinical term for the visible portion of a tooth above the gum line?
- Root
- Apex
- Crown (Correct answer)
- Furcation
Correct answer: Crown
The crown is the anatomical portion of the tooth visible in the mouth above the gingival margin.
Question 6: What are 'dental tubules'?
- Blood vessels within the pulp
- Microscopic channels running through dentin (Correct answer)
- Pores on the enamel surface
- Canals within tooth roots
Correct answer: Microscopic channels running through dentin
Dentinal tubules are tiny channels extending from the pulp through the dentin, playing a role in sensitivity.
Question 7: The term 'chromogenic bacteria' refers to microorganisms that cause what?
- Tooth decay
- Tooth discoloration (Correct answer)
- Gum disease
- Enamel erosion
Correct answer: Tooth discoloration
Chromogenic bacteria produce pigmented compounds that adhere to tooth surfaces, causing extrinsic staining.
Teeth Whitening Teeth Terminology 2
What is the term for the junction where the tooth meets the gum line?