Tooth Parts
Which part of the tooth is the hardest substance in the human body?
A. Dentin
B. Enamel
C. Pulp
D. Cementum
B. Enamel
In which stage does the tooth germ start to look like a cap?
A. Bell stage
B. Maturation stage
C. Cap stage
D. Eruption stage
C. Cap stage
. Which type of teeth are primarily used for cutting food?
A. Molars
B. Canines
C. Incisors
D. Premolars
C. Incisors
What is the main cause of dental cavities?
A. Brushing too hard
B. Lack of calcium
C. Acid produced by bacteria
D. Eating salty snacks
C. Acid produced by bacteria
When does the bud stage of tooth development typically begin in a human fetus?
A. Around 2 weeks
B. Around 6–8 weeks
C. Around 4 months
D. After birth
B. Around 6–8 weeks
What part of the tooth contains blood vessels and nerves?
A. Enamel
B. Dentin
C. Pulp
D. Crown
C. Pulp
Which two types of tissues come together to start tooth development?
A. Enamel and dentin
B. Mesenchyme and ectoderm
C. Cementum and pulp
D. Gingiva and bone
B. Mesenchyme and ectoderm
How many permanent molars are in a full adult mouth (without wisdom teeth removed)?
A. 4
B. 6
C. 8
D. 12
D. 12
(3 on each side of both jaws: 3 x 4 = 12)
Which of the following is a sign of gingivitis?
A. Tooth loss
B. Yellow enamel
C. Bleeding gums when brushing
D. Cracked molars
C. Bleeding gums when brushing
What forms the enamel of a developing tooth?
A. Odontoblasts
B. Fibroblasts
C. Ameloblasts
D. Osteoblasts
C. Ameloblasts
Which of the following is not part of the internal structure of a tooth?
A. Pulp
B. Cementum
C. Enamel
D. Gingiva
Gingiva (it’s the gum, not inside the tooth)
Odontoblasts are responsible for creating which part of the tooth?
A. Enamel
B. Pulp
C. Dentin
D. Gingiva
C. Dentin
Which type of teeth are not present in primary (baby) teeth?
A. Canines
B. Molars
C. Premolars
D. Incisors
C. Premolars
What does plaque eventually harden into if not removed?
A. Tartar
B. Dentin
C. Cementum
D. Enamel
A. Tartar
Canine teeth are primarily adapted for:
A) Grinding
B) Tearing and holding food
C) Cutting
D) Crushing
B) Tearing and holding food
What makes enamel so strong?
A. It has nerve endings
B. It is made of living cells
C. It is highly mineralized with calcium and phosphate
D. It contains collagen fibers
C. It is highly mineralized with calcium and phosphate
hat structure forms the root of the tooth?
A. Dental lamina
B. Pulp chamber
C. Hertwig’s epithelial root sheath (HERS)
D. Vestibular lamina
C. Hertwig’s epithelial root sheath (HERS)
Which teeth are flat on top and have multiple cusps for grinding?
Molars
Which condition might cause teeth to become sensitive to cold or hot?
A. Gum overgrowth
B. Dental abscess
C. Worn enamel or exposed dentin
D. Healthy pulp
C. Worn enamel or exposed dentin
Why does untreated dental plaque eventually cause gum disease?
A) Plaque turns into tartar, which irritates gums and traps bacteria.
B) Plaque directly dissolves the enamel.
C) Plaque turns into bone tissue.
D) Plaque increases saliva production, which harms gums.
A) Plaque turns into tartar, which irritates gums and traps bacteria
Which of the following parts can feel pain?
A. Enamel
B. Dentin
C. Cementum
D. Alveolar bone
B. Dentin
Which of the following does not form from the dental papilla?
A. Odontoblasts
B. Dentin
C. Enamel
D. Pulp
C. Enamel
Which teeth are most likely to be impacted?
A. First molars
B. Premolars
C. Central incisors
D. Wisdom teeth
D. Wisdom teeth
Which of the following statements about gum disease is FALSE?
A. Gingivitis is reversible with good oral hygiene.
B. Periodontitis can cause bone loss around teeth.
C. Tartar can be removed with regular brushing.
D. Gum disease can increase the risk of heart problems.
C. Tartar can be removed with regular brushing.
The dental lamina is important because it...
Initiates tooth bud formation