Ch. 11 - Key Terms

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Quadrant

1 quarter of the dentition

Sextant

1 sixth of the dentition

Functional Occlusion

Contact of the teeth during biting & chewing movements

Curve of Wilson

Cross-arch curvature of the occlusal plane

Concave

Curved outward

Labial Surface

Facial surface closest to the lips

Buccolingual Division

Lengthwise division of the crown in a labial or buccolingual direction, consisting of the facial or buccal/labial third, middle third, & lingual third

Buccal Surface

Tooth surface closest to the inner cheek

Posterior

Toward the back

Anterior

Toward the front

Incisal Surface

Chewing surface of anterior teeth

Occlusal Surface

Chewing surface of posterior teeth

Occlusocervical Division

Crosswire division of the crown that is parallel to the occlusal or incisal surface, consisting of the occlusal third, middle third & cervical third

Curve of Spee

Curvature formed by the maxillary & mandibular arches in occlusion

Convex

Curved outward

Middle Third

Division of the root in the middle

Cervical Third

Division of the root nearest the neck of the tooth

Apical Third

Division of the root nearest the tip of the root

Line Angle

Junction of 2 walls in a cavity preparation

Mesiodistal Division

Lengthwise division of the crown in a mesiodistal (front-to-back) direction, consisting of the mesial third, middle third & distal third

Palatal Surface

Lingual surface of maxillary teeth

Centric Occlusion

Maximum contact between the occluding surfaces of the maxillary & the mandibular teeth

Dentition

Natural teeth in the dental arch

Malocclusion

Occlusion that is deviated from a class l normal occlusion

Succedaneous

Permanent teeth that replace primary teeth

Deciduous

Pertaining to 1st dentition of 20 teeth; often called "baby teeth" or primary teeth

Linguoversion

Position in which the maxillary incisors are behind the mandibular incisors

Lingual Surface

Surface of mandibular & maxillary teeth closest to the tongue; also called palatal surface

Mesial Surface

Surface of the tooth toward the midline

Distal Surface

Surface of tooth distant from the midline

Angle's Classification

System developed by Dr.Edward H. Angle to describe & classify occlusion & malocclusion

Mesioclusion

Term used for class lll malocclusion

Interproximal Space

The area between adjacent tooth surfaces

Masticatory Surface

The chewing surface of the teeth

Primary Dentition

The first set of 20 primary teeth

Labioversion

The inclination of the teeth to extend facially beyond the normal overlap of the incisal edge of the maxillary incisors over the mandibular incisors

Mandibular Arch

The lower jaw

Occlusion

The natural contact of the maxillary & mandibular teeth in all positions

Proximal Surfaces

The surfaces next to each other when teeth are adjacent in the arch

Maxillary Arch

The upper jaw

Facial Surface

Tooth surface closest to the face. Facial surfaces closest to the lips are called labial surfaces, & facial surfaces closest to the inner cheek are called buccal surfaces; therefore, the term facial can be substitued for labial & buccal & vice versa

Embrasure

Triangular space in a gingival direction between the proximal surfaces of 2 adjoining teeth in contact

Distoclusion

A class ll malocclusion in which the mesiobuccal cusp of the maxillary 1st molar occludes (by more than the width of a premolar) mesial to the mesiobuccal groove of the mandibular 1st molar

Mixed Dentition

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

Neutroclusion

An ideal mesiodistal relationship between the jaws & the dental arches

Point Angle

Angle formed by the junction of 3 surfaces

Contact Area

Area of the mesial or distal surface of a tooth that touches the adjacent tooth in the same arch


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