Incisors
Incisors
Incisors (/ɪnˈsaɪzərz/) are the front teeth present in most mammals. They are typically the first adult teeth to grow in after our primary or "baby" teeth.
Etymology
The term "incisor" is derived from the Latin word "incidere", which means "to cut". This is because the primary function of incisors is to cut food.
Function
Incisors are used to bite off and cut food. They are the first part of the digestive system, playing a crucial role in the mechanical digestion process.
Types of Incisors
There are four types of incisors in a human mouth: two central incisors and two lateral incisors, both on the upper and lower jaws.
- Central Incisors: These are the most visible teeth when a person smiles. They are broad and flat with a straight or squared edge. They are the first to erupt at the age of six to eight months for the primary central incisors and six to seven years for the permanent ones.
- Lateral Incisors: These are located next to the central incisors and are smaller in size. They erupt at the age of nine to thirteen months for the primary lateral incisors and seven to eight years for the permanent ones.
Related Terms
- Canines: These are the sharp, pointed teeth that sit next to the incisors and are used for ripping and tearing food.
- Premolars: Also known as bicuspids, these teeth are used for crushing and grinding food.
- Molars: These are the largest teeth in the mouth. They have a flat surface with multiple cusps and are used for grinding and chewing food.
- Dentition: This term refers to the arrangement or condition of the teeth in a particular species or individual.
External links
- Medical encyclopedia article on Incisors
- Wikipedia's article - Incisors
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