Podcast
Questions and Answers
What is the primary function of incisors?
What is the primary function of incisors?
Which of the following is NOT a type of tooth?
Which of the following is NOT a type of tooth?
What is the thin layer covering the root of a tooth?
What is the thin layer covering the root of a tooth?
Which dental arch is formed by the maxillary bones?
Which dental arch is formed by the maxillary bones?
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What is the term for the space between a tooth and the gingiva?
What is the term for the space between a tooth and the gingiva?
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What is the cluster of cells that forms dentin?
What is the cluster of cells that forms dentin?
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What is the primary function of the periodontal ligament?
What is the primary function of the periodontal ligament?
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What is the term for the thick, firm tissue surrounding the roots of teeth?
What is the term for the thick, firm tissue surrounding the roots of teeth?
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Study Notes
Teeth
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Types of Teeth:
- Incisors (8): cutting teeth, chisel-shaped, located in front of the mouth
- Canines (4): pointed teeth, used for piercing and tearing, located on either side of incisors
- Premolars (8): used for crushing and tearing, located behind canines
- Molars (8): used for grinding and crushing, located in the back of the mouth
- Wisdom Teeth (4): third molars, located in the back of the mouth, often removed due to overcrowding
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Tooth Structure:
- Enamel: hard, outer layer
- Dentin: softer, inner layer
- Cementum: thin layer covering root
- Pulp: soft tissue inside tooth, containing nerves and blood vessels
- Root: portion of tooth below gum line
- Crown: portion of tooth above gum line
Dental Arch
-
Upper Dental Arch:
- Maxillary arch
- Formed by maxillary bones
- Contains upper teeth
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Lower Dental Arch:
- Mandibular arch
- Formed by mandible bone
- Contains lower teeth
Gingiva (Gums)
-
Types of Gingiva:
- Marginal gingiva: thin, delicate tissue around tooth margins
- Interdental gingiva: tissue between teeth
- Attached gingiva: thick, firm tissue surrounding roots
- Gingival Sulcus: space between tooth and gingiva
Periodontium
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Components:
- Gingiva (gums)
- Periodontal ligament (PDL): connective tissue between tooth and bone
- Cementum: thin layer covering root
- Alveolar bone: bone surrounding tooth socket
Other Structures
- Dental Papilla: cluster of cells that forms dentin
- Enamel Organ: cluster of cells that forms enamel
- Dental Sac: structure that forms periodontal ligament and cementum
Teeth
- Incisors are 8 chisel-shaped cutting teeth located in the front of the mouth.
- Canines are 4 pointed teeth used for piercing and tearing, located on either side of incisors.
- Premolars are 8 teeth used for crushing and tearing, located behind canines.
- Molars are 8 teeth used for grinding and crushing, located in the back of the mouth.
- Wisdom teeth are 4 third molars located in the back of the mouth, often removed due to overcrowding.
Tooth Structure
- Enamel is the hard, outer layer of the tooth.
- Dentin is the softer, inner layer of the tooth.
- Cementum is a thin layer covering the root.
- Pulp is the soft tissue inside the tooth, containing nerves and blood vessels.
- The root is the portion of the tooth below the gum line.
- The crown is the portion of the tooth above the gum line.
Dental Arch
- The upper dental arch, also known as the maxillary arch, is formed by the maxillary bones and contains the upper teeth.
- The lower dental arch, also known as the mandibular arch, is formed by the mandible bone and contains the lower teeth.
Gingiva (Gums)
- Marginal gingiva is a thin, delicate tissue around tooth margins.
- Interdental gingiva is the tissue between teeth.
- Attached gingiva is a thick, firm tissue surrounding roots.
- The gingival sulcus is the space between the tooth and gingiva.
Periodontium
- The periodontium consists of the gingiva (gums), periodontal ligament (PDL), cementum, and alveolar bone.
- The periodontal ligament (PDL) is the connective tissue between the tooth and bone.
- Cementum is a thin layer covering the root.
- Alveolar bone is the bone surrounding the tooth socket.
Other Structures
- The dental papilla is a cluster of cells that forms dentin.
- The enamel organ is a cluster of cells that forms enamel.
- The dental sac is a structure that forms the periodontal ligament and cementum.
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Description
Learn about the different types of teeth, including incisors, canines, premolars, and molars, and their functions in the mouth. Also, discover the structure of a tooth, including enamel and more.
