Incisor
Incisor
Incisors (/ɪnˈsaɪzər/) are the front teeth present in most mammals. They are the first teeth to appear and are primarily used for cutting food.
Etymology
The term "incisor" is derived from the Latin word "incidere", which means "to cut". This is due to the tooth's sharp edges that are used for cutting and shearing food.
Anatomy
In humans, there are eight incisors, four in the upper jaw (maxillary) and four in the lower jaw (mandibular). Each incisor has a flat, thin edge oriented in the cutting direction. The upper incisors are usually larger and more prominent than the lower ones.
Types of Incisors
There are two types of incisors in humans:
- Central Incisors: These are the most visible teeth when a person smiles. They are located in the middle of the mouth.
- Lateral Incisors: These are located on either side of the central incisors. They are smaller and slightly set back from the central incisors.
Related Terms
- Canine: The pointed tooth located next to the incisors.
- Molar: The large, flat teeth at the back of the mouth used for grinding food.
- Premolar: The teeth located between the canines and molars.
- Dentin: The main tissue that makes up the body of a tooth, located beneath the enamel.
- Enamel: The hard, outermost layer of a tooth.
External links
- Medical encyclopedia article on Incisor
- Wikipedia's article - Incisor
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