Podcast
Questions and Answers
What is the primary function of the pulp in a tooth?
What is the primary function of the pulp in a tooth?
What is the main component of enamel?
What is the main component of enamel?
Which tissue is responsible for attaching the tooth to surrounding bone?
Which tissue is responsible for attaching the tooth to surrounding bone?
What is the main function of the gingiva?
What is the main function of the gingiva?
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What is the composition of dentin?
What is the composition of dentin?
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What is the main characteristic of enamel?
What is the main characteristic of enamel?
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Study Notes
Overview of Oral Tissues
- The oral cavity is composed of several tissues that work together to form a functional unit.
Enamel
- Hardest substance in the human body
- 96% inorganic material (hydroxyapatite), 3% organic material, and 1% water
- Highly resistant to decay and wear
- No living cells or nerves present
Dentin
- Makes up majority of tooth structure
- 70% inorganic material, 20% organic material, and 10% water
- Contains dentinal tubules that transmit sensation to pulp
- Living cells (odontoblasts) present in dentinal tubules
Cementum
- Thin layer of bone-like tissue covering root of tooth
- 45-50% inorganic material, 30-35% organic material, and 20-25% water
- Helps anchor tooth to surrounding bone
Pulp
- Soft tissue at center of tooth containing:
- Nerves
- Blood vessels
- Lymphatic vessels
- Connective tissue
- Responsible for tooth development and maintenance
Periodontium
- Supporting tissues surrounding tooth, including:
- Gingiva (gums)
- Periodontal ligament (connective tissue)
- Cementum
- Alveolar bone
- Attaches tooth to surrounding bone and maintains tooth position
Gingiva (Gums)
- Mucous membrane covering jawbone and surrounding tooth
- Composed of epithelial and connective tissue layers
- Protects underlying tissues from bacteria and trauma
Oral Tissues
- The oral cavity consists of several tissues that work together to form a functional unit.
Enamel
- Composed of 96% inorganic material (hydroxyapatite), 3% organic material, and 1% water.
- Hardest substance in the human body, highly resistant to decay and wear.
- Lacking living cells and nerves.
Dentin
- Makes up the majority of the tooth structure.
- Composed of 70% inorganic material, 20% organic material, and 10% water.
- Contains dentinal tubules that transmit sensation to the pulp.
- Odontoblasts (living cells) are present in dentinal tubules.
Cementum
- A thin layer of bone-like tissue covering the root of the tooth.
- Composed of 45-50% inorganic material, 30-35% organic material, and 20-25% water.
- Helps anchor the tooth to surrounding bone.
Pulp
- A soft tissue at the center of the tooth containing:
- Nerves
- Blood vessels
- Lymphatic vessels
- Connective tissue
- Responsible for tooth development and maintenance.
Periodontium
- Supporting tissues surrounding the tooth, including:
- Gingiva (gums)
- Periodontal ligament (connective tissue)
- Cementum
- Alveolar bone
- Attaches the tooth to surrounding bone and maintains tooth position.
Gingiva (Gums)
- A mucous membrane covering the jawbone and surrounding tooth.
- Composed of epithelial and connective tissue layers.
- Protects underlying tissues from bacteria and trauma.
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Description
Learn about the different tissues that make up the oral cavity, including enamel and dentin, and their composition and functions.
