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30 Cards in this Set
- Front
- Back
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3 main components of a tooth:
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1. Mineralized tissue
2. Dental pulp 3. Periodontium |
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Can the tooth's mineralized tissues be remodeled??
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no
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3 parts to the mineralized tissue:
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1. Enamel
2. Dentin 3. Cementum |
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What % of Enamel is inorganic?
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96%
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What % of Dentin is inorganic?
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70%
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What % of Cementum is inorganic?
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40-50%
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Where is Enamel?
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It covers the crown of the tooth
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What secretes Enamel? When?
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Ameloblasts - during formation of the embryo
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Where is Dentin?
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In the crown and roots of the tooth.
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What secretes Dentin? When?
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Odontoblasts - thruout life
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Is dentin repairable?
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Somewhat, when it's fresh.
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Is Cementum break-downable?
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No, it is resistant to resorption.
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Where is Cementum?
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Covering the root of the tooth.
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What cells make up Cementum?
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Root: acellular
Lower part: Cementocytes |
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What secretes Cementocytes? Where are they located?
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Cementoblasts located at the cementum/periodontal ligament border.
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Are the mineralized tissues vascular?
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No
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Is the Dental Pulp?
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Yes
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What does the dental pulp consist of?
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Loose connective tissue and fluid
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What do the cells of the dental pulp consist of?
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-Fibroblasts
-Macrophages -Odontoblasts |
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What is the periodontium?
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The supporting and attachment structures of the tooth.
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What 4 structures make up the periodontium?
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1. Alveolar process
2. Cementum 3. Periodontal ligament 4. Dentogingival junction |
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What is the alveolar process?
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The bony socket holding the tooth.
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What do we already know cementum is?
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Mineralized tissue covering the root of the tooth.
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What surrounds the cementum?
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The periodontal ligament
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Is the periodontal ligament really a ligament?
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No it is more cellular and vascular than that.
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What are the 3 functions of the periodontal ligament?
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-Proprioception
-Nutrition -Support |
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What is the dentogingival junction?
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The epithelium covering the gingival apex and sulcus
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What type of epithelium is deep to the gingival sulcus?
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Attachment epithelium
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What is the function of the basement membrane of the Attachment epithelium?
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To act as a seal around the neck of the tooth.
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What helps prevent food and junk from getting around the tooth base?
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Inflammatory cells in the lamina propria under the attachment epithelium.
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