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Dental A&P Ch #1 Terminology

Terms in this set (73)

All the teeth in the mouth, primary, perm or mixed

Primary dentition

consists of 20 teeth that are normally lost during childhood and are replaced by the permanent teeth (6 mos- 2 years)

Permanent dentition

consists of 32 teeth that are designed to last a lifetime

Upper arch of teeth, #s 1-16 in permanent, #s A-J in primary

one quarter of the teeth in the mouth (4 quadrants in entire mouth)

4 Categories or groups of teeth based on similar shape and function

location between right and left central incisor, dividing mouth in to

Teeth between the canines that are used for cutting.

the class of teeth located 3rd from the midline in each quadrant

Back teeth that grind food, 1st, 2nd, 3rd

Central Incisor

the first tooth starting from the midline; used to cut or bite the food that is ingested

Lateral Incisor

the second tooth from the midline used for cutting, located beside the central incisor in each quadrant

molar located closest to the midline in each molar

Tooth located one tooth behind the 1st molar in each quadrant

Deciduous dentition

Also known as baby teeth, this is the first set of teeth, which form in utero and erupt shortly after birth.

Mixed Dentition

A mixture of permanent teeth and primary teeth that occurs until all primary teeth have been lost, usually between the ages of 6 and 12.

The teeth immediately behind the canines; used in chewing, grinding, and shearing food. The bicuspid teeth

incisors and canines #s 6-11, and 22-27

Posterior teeth

The teeth located at the back of the mouth, premolars, molars

Universal Numbering system

identification of the teeth by numbering the permanent teeth 1-32 and lettering the primary teeth A-T

Palmer notation system

This numbering system assigns a number and bracket to each tooth. (Commonly used for charting in orthodontics)

Portion of the tooth that is covered with enamel

part of the tooth covered by cementum

hard, outermost layer of a tooth

External layer of calcified tissue that covers the anatomic root of a tooth.

Cementoenamel Junction (CEJ)

The junction line between the enamel layer and the cementum layer of the tooth. also called cervical

junction between enamel and cementum layers of the tooth

Tooth tissue underlying the enamel and cemenetum, surrounds the pulp cavity

Dentinoenamel junction

Junction between dentin and enamel

Cementodentinal Junction (CDJ)

the junction of the cementum and the dentin, cannot be seen on intact tooth

soft tissue within a tooth, containing nerves and blood vessels, blood vessels, surrounded by dentin

space in the inner portion of the tooth, filled with nerves and blood supply to tooth, made up of pulp canal and chamber

wider portion of the pulp cavity closer to the crown

Portion of the pulp cavity that is located in the roots of teeth, also called a root canal

Holes near the root tip where nerves and vessels enter the pulp

specialized cells lining the pulp chambers tat produce dentin

Secondary dentin

Normally maturing dentin layed down throughout life

Reparative dentin

irregular dentin layed down in responce to an irritant like decay or drilling to remove decay. Also called tertiary dentin.

tissue that surround, envelop or ebed the teeth

the bone surrounding the roots of teeth

soft tissue overlying the bone that surrounds tooth roots

Attached gingiva

keratinized gingiva firmly bound to underlying bone; extends from the free gingival groove to the mucogingival junction

mucogingival junction

scalloped junction between attached gingiva and losely attached alveolar mucosa

Collar of tissue that surrounds each tooth with a potential space (Sulcus) between it and the tooth. Includes interdental papilla

Gingival sulcus

The potential space between the free gingiva and the tooth.

Gingival Margin

edge of gingiva closest to the biting or chewing surfaces of the teeth

Periodontal Ligament

this band of tissue connection cementum of the tooth root, and alveolar bone. (PDL. includes apical, oblique, horizontal and alveolar crest fibers)

the portion of a tooth that is visible in the mouth, and in a tooth with bone and tissue loss, includes exposed anatomic root

portion of a tooth that is not visible in the mouth; in a partially erupted tooth, this includes part of the anatomic crown, which is not visible.

proximal surface

Tooth surface, mesial or distal, that in ideal alignment touches an adjacent tooth

parts of tooth exposed to natural rubbing action of the lips, cheeks, and tongue

linear junction between two external tooth surfaces, or two cavity preparation walls

point formed at the junction of 3 external tooth surfaces or 3 adjacent cavity preparation walls

root to crown ratio

root length divided by crown length; is an indicator for the usefulness of that tooth as an abutment for a bridge

Somewhat pyramidal elevation of the occlusal surface or incising surface on a canine

A linear elevation extending both mesially and distally from a cusp tip.

the peak or highest point of a cusp

Budge in the cervical third of the lingual surface of anterior teeth. forms the lingual height of contour

triangular ridge

Ridge of a posterior tooth that extends from a cusp tip toward the depression or sulcus near the middle of the occlusal surface

transverse ridge

ridge tranversing the tooth from a buccal cusp, to the lingual cusp, comprosmised of 2 connecting triangular ridges

Ridges that form the mesial and distal borders of the lingual surfaces on anterior teeth and the mesial and distal borders of occlusal surfaces on posterior teeth.

occlusal crown outline

Outer outline of the entire tooth crown from the occlusal view

occlusal table/ occlusal surface

chewing surface of posterior teeth bounded by continuous marginal ridges and mesial and distal cusp ridges

crest of curvature

greatest bulge of a crown contour where a line drawn parallel to the midroot axis line touches the crown outline. also called height or crest of contour

three bumbs of enamel found on the incisal ridges

Minute Horizontal ridges seen on the enamel of newly erupted teeth formed by layers of enamel formation

V shaped depression or valley evident between lingual or cusp of posterior tooth

Small depressions as seen on the occlusal surface of posterior teeth

linear channel in enamel, often found in the depth of a slucus

dental decay, literally means rotten

alveolar mucosa

Loose non keratinized gingiva, apical to attached gingiva that is not firmly attached to bone or tooth

Space between adjacent teeth that is not the result of a missing tooth

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