Ch. 11 - Key Terms
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
