Human Dentition Lesson No. 4

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29 Terms

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<p>Incisors </p>

Incisors

Single rooted teeth, located in the front of the mouth and designed to cut food

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<p>Canines (also known as “cuspids”)</p>

Canines (also known as “cuspids”)

Single rooted teeth, located at the “corner” of the arch, designed for tearing and cutting food. It has the longest root of the human teeth. It is also the most stable tooth in the mouth and usually last to be lost

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<p>Premolars (also known as “biscuspids”)</p>

Premolars (also known as “biscuspids”)

Have cusps for grasping and tearing food. It has a somewhat broad surface for grinding food

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<p>Molars</p>

Molars

Have more cusps than other teeth in the mouth. Broad and short cusps translate into a wider chewing surface used for grinding hard masses of food

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Mandibular Arch

Lower Arch- Movable

<p>Lower Arch- Movable</p>
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Maxillary Arch

Upper Arch- Not capable of movement and fixed to the skull

<p>Upper Arch- Not capable of movement and fixed to the skull</p>
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Occlusion

The contact between maxillary and mandibular teeth during function

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<p>Midline </p>

Midline

An imaginary line which divides which divides wach arch into mirrored halves

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<p>Quadrants </p>

Quadrants

Two arches that are divided into halves create four quadrants

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<p>Sextants</p>

Sextants

The dentition is sometimes divided into six parts

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<p>Anterior </p>

Anterior

Incisors and Canines

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<p>Posterior </p>

Posterior

Premolars and Molars

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Labial Surface

Facial surface of anterior teeth closest to the lips

<p>Facial surface of anterior teeth closest to the lips </p>
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Buccal Surface

Facial surface of posterior teeth closest to the cheeks

<p>Facial surface of posterior teeth closest to the cheeks</p>
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Masticatory surface

Chewing Surface

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Incisal Surface

Chewing surface of anterior teeth

<p>Chewing surface of anterior teeth</p>
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Occlusal Surface

Chewing surface for posterior teeth

<p>Chewing surface for posterior teeth</p>
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Lingual Surface

Surface closest to the tongue

<p>Surface closest to the tongue</p>
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Mesial Surface

Surface closest to the midline

<p>Surface closest to the midline</p>
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Distal Surface

Surface farthest from the midline

<p>Surface farthest from the midline</p>
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Proximal Surface

Surface of a tooth facing the adjacent tooth

<p>Surface of a tooth facing the adjacent tooth</p>
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Interproximal Space

The area between adjacent tooth surfaces

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Apical Third

Closest to the apex of the tooth

<p>Closest to the apex of the tooth</p>
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Apex

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Middle third

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Cervical Third

Closest to the Cervix (neck of the tooth)

<p>Closest to the Cervix (neck of the tooth)</p>
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Occlusocervical Division

Division parallel to the chewing surface of the tooth

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Mesiodistal Division

Division lengthwise in a mesial-distal(front to back) direction

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Buccolingual Division

Lengthwise division in facial-lingual direction