Heterodont

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Heterodont is a term used in the field of anatomy and zoology to describe animals that possess more than one type of tooth. This is in contrast to homodont animals, which have only one tooth type. Heterodonty is a primitive characteristic, and is present in the majority of mammals, including humans.

Overview[edit | edit source]

File:Heterodont dentition.jpg
Heterodont dentition in a mammal

Heterodonty is a characteristic of mammals, and it allows for more specialized feeding strategies. The different types of teeth in a heterodont animal include incisors, canines, premolars, and molars. Each type of tooth has a different function. For example, incisors are used for cutting or nipping, canines are used for tearing or slashing, and molars and premolars are used for grinding and crushing food.

Evolution[edit | edit source]

The evolution of heterodonty is a significant development in the history of vertebrates. The earliest vertebrates had simple, homodont dentition. The evolution of heterodonty allowed for a wider range of food sources and feeding strategies, contributing to the success of mammals.

In Humans[edit | edit source]

In humans, the dentition is heterodont and diphyodont. This means that humans have two successive sets of teeth during their lifetime, a set of deciduous or "baby" teeth and a set of permanent teeth. The human dentition consists of four types of teeth: incisors, canines, premolars, and molars. Each type of tooth has a different function in the process of mastication.

See Also[edit | edit source]

References[edit | edit source]



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Contributors: Prab R. Tumpati, MD