Podcast
Questions and Answers
What is the approximate percentage of inorganic minerals in dentine?
What is the approximate percentage of inorganic minerals in dentine?
- 50%
- 10%
- 20%
- 70% (correct)
What is the main structural unit of dentine?
What is the main structural unit of dentine?
- Pulp fibers
- Cementoblasts
- Dentine tubules (correct)
- Enamel prisms
Which of the following describes the path of dentine tubules?
Which of the following describes the path of dentine tubules?
- Straight
- S-shaped (correct)
- Zigzag
- Wavy
What is the name of the dentine that forms the wall of the tubules?
What is the name of the dentine that forms the wall of the tubules?
Which type of dentine makes up the bulk of the dentine?
Which type of dentine makes up the bulk of the dentine?
What is contained within the dentine tubule?
What is contained within the dentine tubule?
Which of the following is found only in root dentine?
Which of the following is found only in root dentine?
Which type of dentine is formed before the completion of root formation?
Which type of dentine is formed before the completion of root formation?
What is another name for tertiary dentine?
What is another name for tertiary dentine?
In healthy teeth, what color is dentine compared to enamel?
In healthy teeth, what color is dentine compared to enamel?
Flashcards
Composition of dentine
Composition of dentine
The composition of dentine is approximately 70% inorganic minerals, 20% organic material, and 10% water.
Dentine tubules
Dentine tubules
Minute tubes that permeate the dentine structure, extending from the DEJ to the border of the pulp chamber.
Peritubular dentine
Peritubular dentine
The wall of Dentine tubules; highly calcified with minimal collagen.
Intertubular dentine
Intertubular dentine
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Periodontoblastic space
Periodontoblastic space
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Interglobular dentine
Interglobular dentine
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Sclerotic dentine
Sclerotic dentine
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Dead tracts in dentine
Dead tracts in dentine
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Lines of Von Ebner
Lines of Von Ebner
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Contour Lines of Owen
Contour Lines of Owen
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Study Notes
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The lecture is about the histology of dentine.
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At the end of the session students should be able to describe the composition and structure of dentine, distinguish between the 3 types of dentine (primary, secondary and tertiary), describe how the structure of dentine relates to its function, and apply this knowledge to interpret the clinical significance of dentine in health and disease.
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GDC Learning Outcomes: 1.1.5, 1.1.6
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Dentine is one of the tissues of the teeth and supporting structures
Prior Knowledge
- Dentine location, dentinogenesis, embryonic origin are relevant here
- Oral embryology and Tooth morphology are useful to refer to
Importance of Dentine
- Understanding dentine is essential for clinical assessment, diagnosis, management, and advice.
- Dentine knowledge relates to dentine hypersensitivity and management, restorative and bonding materials, identification of caries, affected and healthy dentine, radiographs, pathology, and repair of dentine linked to pulp
Composition of Dentine
- Dentine is roughly 70% inorganic minerals, primarily calcium hydroxyapatite, which is smaller than enamel
- Dentine also consists of 20% organic material, mainly a collagenous rich matrix (18%) with minority non-collagenous matrix proteins and lipids (
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