Histology Quiz Flashcards
What do we call alternating light and dark bands in the enamel which gives the tooth surface a wavelike appearance?
Hunter-Schreger Band (HSB).
At what stage of tooth development are enamel pearls formed?
Apposition Stage.
What is displaced to cause enamel pearls?
Ameloblasts.
What are enamel pearls often confused with?
Calculus.
Describe carious lesions in the enamel as they first appear…
“White-spot lesion”
-Appear whiter and rougher due to demineralization.
Give two examples of enamel hypoplasia…
EITHER…
Enamel pearl, and enamel dysplasia
OR…
hereditary enamel hypoplasia, and environmental enamel hypoplasia.
What is fluorosis?
Excess systemic fluoride during tooth development.
-Intrinsic stain.
~Can not be removed.
List four causes of dentin/tooth hypersensitivity.
- Caries
- Cavity preparation
- Gingival recession
- Attrition
How do we detect dentin exposure?
…
Which developmental defect can result in a brittle bluish tinge to the teeth?
Dentinogenesis imperfecta.
Describe dentin…
The hard inner layer of tooth crown overlying the pulp.
What area of the pulp communicates with the rest of the body by allowing arteries, veins, and nerves to enter?
Apical foramen.
Describe the difference between the pulp chambers and horns of the primary dentition compared to the adult dentition…
- Pulp horns recede with age.
- Radicular pulp narrows with age.
On a radiograph, what appears more radiolucent? Dentin or pulp…
Pulp.
What occurs to the number of nerves and blood vessels in the pulp as we age?
- They reduce.
- A decrease in intracellular substance, water, and cells as it fills with an increased amount of collagen fibers.
- The pulp becomes more fibrotic with age.
List 3 factors that may increase cemental caries in older adults…
- Xerostomia
- Poor manual dexterity
- Poor nutrition
The most common interface at the CEJ is when the cementum and enamel meet end to end. This occurs in _____% of cases.
52%
What is hypercementosis?
Excessive production of cellular cementum.
Where is hypercementosis most commonly found?
Apex or apices of the tooth.
What is the function of the periodontal ligament?
- Supportive function.
- Attaches the tooth to the alveolar bone.
- It allows very minimal movement.
What occurs to the periodontal ligament with age?
…
List the 5 fibers of the periodontal ligament.
- Alveolar crest fibres.
- Horizontal fibers.
- Oblique fibers.
- Apical fibers.
- Interradicular fibers.
What is periodontitis?
Periodontal disease involving deeper structures of the periodontium.
What will periodontitis result in?
- Loose teeth (mobility).
- Tooth loss.
- Loss of attachment.
- Bone loss.
- Gingival recession.
