Permanent Canines

Flashcards covering the anatomical landmarks, chronology, morphology, and comparisons of maxillary and mandibular permanent canines.

Corner stones

A term referring to the permanent canines because of their arch position at the corners of the mouth and their role as the longest teeth in the dental arches.

Canine lobes

The four developmental lobes that form each canine tooth, consisting of three labial lobes and a single lingual lobe.

Canine Eminence

A prominent convex ridge on the alveolar bone overlying the well-developed labial root of the maxillary canine, which helps support facial expressions and the lips.

Canine functions

Functions that include helping in cutting, tearing, and piercing food, as well as supporting facial expressions and the lips.

Maxillary canine eruption chronology

A developmental timeline where enamel is completed at 6–7 years, eruption occurs at 11–12 years, and root completion occurs at 14–15 years.

Mandibular canine eruption chronology

A developmental timeline where enamel is completed at 6–7 years, eruption occurs at 9–10 years, and root completion occurs at 12–13 years.

Maxillary canine geometric outline (labial and lingual aspects)

Pentagonal in outline form, or trapezoidal if the cusp slopes are not considered.

Maxillary canine mesial outline (labial aspect)

Convex from the contact area toward the cervical line, with a slightly concave area cervically.

Maxillary canine distal outline (labial aspect)

Concave cervically from the cervical line to the contact area, and convex at the contact area.

Labial ridge of the canine

A prominent vertical enamel ridge located on the middle third of the labial crown surface, resulting from the excessive development of the middle labial lobe.

Maxillary canine lingual elevations

Elevations comprising the cingulum, lingual ridge, mesial and distal marginal ridges, and mesial and distal cusp ridges.

Maxillary canine lingual depressions

Two distinct fossae, termed the mesial and distal lingual fossae, separated by the elevated lingual ridge.

Maxillary canine proximal geometric outline

Triangular or wedge-shaped in outline form from both the mesial and distal views.

Maxillary canine cusp tip inclination

Positioned directly on the long axis of the tooth or slightly labial to it when viewed from the proximal aspect.

Maxillary canine incisal geometric form

Diamond-shaped in geometric outline, where the labiolingual dimension is greater than the mesiodistal dimension.

Maxillary canine cusp tip position (incisal aspect)

Located labial to the center labiolingually and mesial to the center mesiodistally, resulting in a distal cusp slope that is longer than the mesial cusp slope.

Mandibular canine crown dimensions

A crown that is narrower mesiodistally and longer cervicoincisally than the broader and shorter crown of the maxillary canine.

Mandibular canine mesial outline (labial aspect)

Nearly straight from the cervical line to the contact area, aligning almost continuously with the mesial root surface.

Mandibular canine lingual anatomy

Lingual features including a less pronounced cingulum, less distinct marginal ridges, a lingual ridge extending only on the incisal third, and only one shallow lingual fossa.

Mandibular canine cusp tip inclination

More lingually inclined and less pointed compared to the maxillary canine cusp tip.

Bifurcated mandibular canine root

An anatomical variation occurring in approximately $5\%$ of mandibular canines where the root divides into labial and lingual branches at the apical third.

Permanent Canines (Cornerstones)

The four longest teeth in the dental arches (two maxillary and two mandibular) positioned at the corners of the mouth, serving as the cornerstones of the arches.

Canine Developmental Lobes

The four structural units that form the canine: three labial lobes (mesiolabial, middle labial, distolabial) and a single lingual lobe.

Canine Eminence

A prominent convex ridge of bone on the labial surface of the maxilla created by the socket over the canine's well-developed root, providing structural support to the lips and facial expressions.

Functions of Canines

Masticatory actions including the cutting, tearing, and piercing of food, as well as cosmetic support for the lips and facial expressions.

Maxillary Canine Chronology

Key developmental ages for the upper canine: enamel completion at $6\text{--}7\text{ years}$, eruption at $11\text{--}12\text{ years}$, and root completion at $14\text{--}15\text{ years}$.

Maxillary Canine Geometric Outline (Labial & Lingual Aspects)

Pentagonal in outline, or trapezoidal if the cusp slopes are not taken into consideration.

Maxillary Canine Geometric Outline (Mesial & Distal Aspects)

Triangular or wedge-shaped in outline with the base at the cervix and the apex at the cusp tip.

Maxillary Canine Geometric Outline (Incisal Aspect)

Diamond-shaped in outline, with a greater labiolingual measurement than mesiodistal measurement.

Maxillary Canine Mesial Outline (Labial Aspect)

Convex from the contact area toward the incisal slope and slightly concave from the contact area to the cervical line.

Maxillary Canine Distal Outline (Labial Aspect)

Concave in the cervical half and convex in the incisal half leading up to the distal contact area.

Maxillary Canine Labial Elevations

The cervical ridge located in the cervical third and the prominent vertical labial ridge running down the center of the crown.

Maxillary Canine Lingual Elevations

A well-developed cingulum, a strong lingual ridge extending from the cusp tip to the cingulum, mesial and distal marginal ridges, and mesial and distal cusp ridges.

Maxillary Canine Lingual Depressions

Two distinct fossae, the mesial lingual fossa and the distal lingual fossa, divided centrally by the prominent lingual ridge.

Maxillary Canine Cusp Slopes

The incisal margins of the cusp, where the mesial slope is shorter than the longer distal slope.

Maxillary Canine Cusp Tip Alignment

Positioned on the long axis of the tooth or slightly labial to it; situated labial to center labiolingually and mesial to center mesiodistally.

Maxillary Canine Root

A slender, conical root that is the longest in the dental arch, narrower on the lingual side, with an apex typically curved distally.

Mandibular Canine Chronology

Key developmental ages for the lower canine: enamel completion at $6\text{--}7\text{ years}$, eruption at $9\text{--}10\text{ years}$, and root completion at $12\text{--}13\text{ years}$.

Mandibular Canine Crown Proportions

Longer and narrower compared to the maxillary canine crown, which is broader and shorter mesiodistally.

Mandibular Canine Mesial Outline (Labial Aspect)

A nearly straight outline that is almost continuous with the mesial outline of the root.

Mandibular Canine Lingual Ridge

A subtle elevation that extends only on the incisal third of the lingual surface, rather than reaching the cingulum.

Mandibular Canine Lingual Fossa

A single, shallow, and less pronounced lingual fossa, unlike the two distinct fossae found in the maxillary canine.

Mandibular Canine Cusp Tip Inclination

Lingually inclined relative to the long axis of the tooth, making the cusp tip appear less pointed from the labial view.

Bifurcated Mandibular Canine Root

An anatomical variation occurring in approximately $5\%$ of mandibular canines where the root divides into labial and lingual branches at the apical third.

Mandibular Canine Distal Aspect Characteristics

Distinguished by a more pronounced distal marginal ridge, a more cervically positioned contact area, less cervical line curvature, and a deeper root developmental depression compared to the mesial side.