Mandibular canine

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The mandibular canine is the tooth located distally (away from the midline of the face) from both mandibular lateral incisors of the mouth but mesially (toward the midline of the face) from both mandibular first premolars. Both the maxillary and mandibular canines are called the "cornerstone" of the mouth because they are all located three teeth away from the midline, and separate the premolars from the incisors. The location of the canines reflect their dual function as they complement both the premolars and incisors during mastication, commonly known as chewing. Nonetheless, the most common action of the canines is tearing of food. There is a single cusp on canines, and they resemble the prehensile teeth found in carnivorous animals. Though relatively the same, there are some minor differences between the deciduous (baby) mandibular canine and that of the permanent mandibular canine.

In the universal system of notation, the deciduous mandibular canines are designated by a letter written in uppercase. The right deciduous mandibular canine is known as "R", and the left one is known as "M". The international notation has a different system of notation. Thus, the right deciduous mandibular canine is known as "83", and the left one is known as "73".

In the universal system of notation, the permanent mandibular canines are designated by a number. The right permanent mandibular canine known as "27", and the left one is known as "22". In the Palmer notation, a number is used in conjunction with a symbol designating in which quadrant the tooth is found. For this tooth, the left and right canines would have the same number, "3", but the right one would have the symbol, "┐", over it, while the left one would have, "┌". The international notation has a different numbering system than the previous two, and the right permanent mandibular canine is known as "43", and the left one is known as "33".