1. Which of the following is the hardest substance in the human body?
A) Enamel
B) Dentin
C) Pulp
D) Cementum
Answer: A) Enamel
Rationale: Enamel is the outermost layer of the tooth, and it is the hardest substance in the human body. It protects the tooth from wear and tear caused by chewing and other activities. Dentin is the layer under the enamel and is less hard than enamel but still quite durable. Pulp is the soft tissue located in the center of the tooth, while cementum is the layer of connective tissue that covers the root of the tooth.
2. What is the function of the periodontal ligament?
Answer: A) Enamel
Rationale: Enamel is the outermost layer of the tooth, and it is the hardest substance in the human body. It protects the tooth from wear and tear caused by chewing and other activities. Dentin is the layer under the enamel and is less hard than enamel but still quite durable. Pulp is the soft tissue located in the center of the tooth, while cementum is the layer of connective tissue that covers the root of the tooth.
2. What is the function of the periodontal ligament?
A) It provides shock absorption during chewing
B) It nourishes the tooth and keeps it healthy
C) It anchors the tooth to the jawbone
D) It protects the tooth from wear and tear
Answer: A) It provides shock absorption during chewing
Rationale: The periodontal ligament is the tissue that attaches the cementum to the bone that surrounds the tooth. It provides shock absorption during chewing and helps to keep the tooth stable. It does not nourish the tooth or protect it from wear and tear, and while it does anchor the tooth to the jawbone, this is not its primary function.
Answer: A) It provides shock absorption during chewing
Rationale: The periodontal ligament is the tissue that attaches the cementum to the bone that surrounds the tooth. It provides shock absorption during chewing and helps to keep the tooth stable. It does not nourish the tooth or protect it from wear and tear, and while it does anchor the tooth to the jawbone, this is not its primary function.
3. Which type of tooth is responsible for cutting and tearing food?
A) Incisors
B) Canines
C) Premolars
D) Molars
Answer: A) Incisors
Answer: A) Incisors
4. Which type of tooth is responsible for grinding and crushing food?
A) Incisors
B) Canines
C) Premolars
D) Molars
Answer: D) Molars
Answer: D) Molars
5. Which layer of the tooth contains nerves and blood vessels?
A) Enamel
B) Dentin
C) Pulp
D) Cementum
Answer: C) Pulp
Answer: C) Pulp
6. What is the term for the hard deposit that forms on teeth due to a buildup of bacteria?
A) Plaque
B) Tartar
C) Decay
D) Cavity
Answer: B) TartarWhat is the term for a tooth that has not emerged from the gumline? A) Impacted B) Decayed C) Infected D) Abscessed
Answer: A) Impacted
Answer: B) TartarWhat is the term for a tooth that has not emerged from the gumline? A) Impacted B) Decayed C) Infected D) Abscessed
Answer: A) Impacted
7. What is the term for the loss of tooth structure due to acid produced by bacteria?
A) Plaque
B) Tartar
C) Decay
D) Cavity
Answer: C) Decay
Answer: C) Decay
8. Which type of tooth is often referred to as the "eye tooth"?
A) Incisor
B) Canine
C) Premolar
D) Molar
Answer: B) Canine
Answer: B) Canine
9. What is the term for the surgical removal of a tooth?
A) Extraction
B) Filling
C) Root canal
D) Crown
Answer: A) Extraction
Answer: A) Extraction
10. What is the term for a dental restoration that covers the entire surface of a tooth?
A) Filling
B) Crown
C) Bridge
D) Implant
Answer: B) Crown
Answer: B) Crown
11. What is the term for a tooth that is not properly aligned with the other teeth?
A) Impacted
B) Decayed
C) Malocclusion
D) Abscessed
Answer: C) Malocclusion
Answer: C) Malocclusion
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