2. Introduction to Teeth
• Teeth are hard, mineralized structures found in the mouths of
vertebrates.
• They are used for biting, chewing, and grinding food.
• Humans have two sets of teeth: primary teeth (baby) and permanent
teeth (adult).
3. Tooth Structure
A tooth is made up of four parts:
•Enamel: The hardest substance in the human body, enamel is a hard,
white, calcified structure that protects the inside of the tooth. Enamel is
made up of parallel nanocrystals that are bundled into rods.
•Dentin: A hard tissue that makes up the tooth.
•Cementum: A hard tissue that makes up the
tooth.
•Pulp: A soft, non-calcified tissue that contains nerves, blood vessels,
and connective tissue. The pulp is located in the center of the tooth.
4. Tooth Layers
• The outermost layer of the tooth is called enamel.
• Enamel is the hardest substance in the human body and protects
the tooth from decay.
• Beneath the enamel is the dentin, which is a hard tissue that
supports the enamel.
5. Tooth Layers
• The innermost layer of the tooth is called the pulp.
• The pulp contains blood vessels, nerves, and connective tissue.
• It provides nourishment to the tooth and helps to keep it alive.
6. Types of Teeth
• Humans have four different types of teeth: incisors, canines,
premolars, and molars.
• Incisors are the sharp, chisel-shaped teeth at the front of the mouth
used for cutting food.
• Canines are the pointed teeth next to the incisors and are used for
tearing and grasping. Premolars, also known as bicuspids, are
located between the canines and molars.
7. • Premolars, also known as bicuspids, are located between the
canines and molars.
• They have a flat surface and are used for crushing and grinding
food.
• Molars are the largest and strongest teeth at the back of the mouth
and are used for grinding food.
8. Tooth Eruption
• Tooth eruption is the process by which teeth emerge from the gums.
• Primary teeth typically begin to erupt around 6 months of age.
• Permanent teeth start to erupt around the age of 6 and continue until
early adulthood.
9. NERVE SUPPLY OF TEETH
The pulp and periodontal membrane have the nerve supply which is as
follows:
The upper teeth are supplied by the posterior superior
alveolar, middle superior alveolar, and the anterior superior alveolar
nerves maxillary nerve.
Maxillary Teeth
The lower teeth are supplied by the inferior alveolar
nerve (mandibular nerve)
