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Humans have four types of teeth: incisors, canines, premolars, and molars, which each have a specific function. The incisors cut the food, the canines tear the food and the molars and premolars crush the food. The roots of teeth are embedded in the maxilla (upper jaw) or the mandible (lower jaw) and are covered by gums.
Dental anatomy is a field of anatomy dedicated to the study of human tooth structures. The development, appearance, and classification of teeth fall within its purview. (The function of teeth as they contact one another falls elsewhere, under dental occlusion.) Tooth formation begins before birth, and the teeth's eventual morphology is dictated ...
In Japan, yaeba (八重歯, lit. 'double tooth'; snaggle maxillary canines) are human teeth, especially upper canines, with an uncommonly fang-like appearance. Yaeba most often refers to a tooth overlapping another tooth or protruding from higher in the gum. In Japan it is perceived as a sign of youthfulness and natural beauty. [1][2] In 2013 ...
File:Human tooth diagram-en.svg. Size of this PNG preview of this SVG file: 512 × 408 pixels. Other resolutions: 301 × 240 pixels | 602 × 480 pixels | 964 × 768 pixels | 1,280 × 1,020 pixels | 2,560 × 2,040 pixels. This is a file from the Wikimedia Commons. Information from its description page there is shown below.
Human tooth development. Tooth development or odontogenesis is the complex process by which teeth form from embryonic cells, grow, and erupt into the mouth. For human teeth to have a healthy oral environment, all parts of the tooth must develop during appropriate stages of fetal development.
Dental fluorosis is a common [2] disorder, characterized by hypomineralization of tooth enamel caused by ingestion of excessive fluoride during enamel formation. [3] It appears as a range of visual changes in enamel [4] causing degrees of intrinsic tooth discoloration, and, in some cases, physical damage to the teeth.
Tooth eruption is a process in tooth development in which the teeth enter the mouth and become visible. It is currently believed that the periodontal ligament plays an important role in tooth eruption. The first human teeth to appear, the deciduous (primary) teeth (also known as baby or milk teeth), erupt into the mouth from around 6 months ...
The primary tooth will begin to show signs of development between 14 2 ⁄ 3 weeks and 16 1 ⁄ 2 weeks in utero, at an average of 16 weeks. [5]The permanent tooth typically will erupt between when the child is 8 or 9 years old, while the root will continue to mineralize until around 11 years old. [4]