permanent maxillary & mandibular canine
Post on 14-Jul-2015
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By
Dr. Abhishek Solanki
Introduction Canines are very long and stable teeth
There are 4 canines (2 Maxillary & 2 Mandibular) placedat corner of mouth & hence called ‘corner stones’ of thedentition
Single pointed cusp present so also called cuspids
The canine's role in mastication is mainly tearing, whichis intermediate between incising of anterior teeth &grinding of the posterior teeth
Arch position - The permanent maxillary canine replaces
deciduous maxillary canine & is located 3rd from midline
in each maxillary quadrant
Mesial contact : Maxillary lateral incisor
Distal contact : Maxillary first premolar
Tooth Numbering Systems
UNIVERSAL SYSTEM - 6,11
ZSIGMONDY / PALMER - 3 3
FDI SYSTEM - 13, 23
Chronology
First evidence of calcification : 4-5 months
Enamel completed : 6-7 yr
Eruption : 11-12yrs
Root completed : 13-15yrs
Average Dimension (in mm)
Crown Length 10
Root Length 17
Mesiodistal Diameter at Contact Area 7.5
Mesiodistal Diameter at Cervical Lines 5.5
Labiolingual Diameter at Crest of Curvature 08
Labiolingual Diameter at Cervical Lines 07
Curvature of Cervical Line : Mesial 2.5
Curvature of Cervical Line : Distal 1.5
Labial Aspect• The crown of maxillary canine is narrower
mesiodistally than that of maxillary central incisor
It has two slopes (cusp ridges), the mesial slope
being shorter than the distal slope
The labial surface is smooth and bulky in the
middle because of the labial ridge
Imbrication lines can often be found in cervical
3rd of the facial surface : “Lines of Pickerell”
Mesial outline : usually convex & rounded
mesioincisal angle
Height of contour (mesial margin) : at contact
area (junction of incisal & middle thirds)
Distal margin : Shorter than the mesial margin &
also has a more rounded incisal angle
Height of contour : at contact area (middle 3rd)
Incisal margin - divided into two components by tip
of cusp & are termed the mesioincisal and
distoincisal slopes (or mesial & distal cusp ridges)
Labial surface is convex in all directions, but curvature ismore pronounced mesiodistally
General outline of the surface is pentagonal
Incisal aspect has a large cusp with a pointed cusp tip
Labial aspect
Labial ridge
Cusp tip
Distal cusp ridge Mesial Cusp
Ridge
Lingual Aspect Crown and root are narrower lingually
Cingulum is well developed, large & sometimes
pointed like a cusp
Cervical line curves asymmetrically toward the
apex with a slight offset to the distal
A well developed lingual ridge is seen which divides
mesial & distal lingual fossae
Heavy marginal ridges are associated with well formed
cingulum and fossae
CL : Cervical line C : CingulumMMR : mesial marginal ridgeDMR : distal marginal ridgeLR : lingual ridgeDLF : distolingual fossa
Mesial Aspect
From the mesial aspect canine looks similar but bulkier
than maxillary central incisor
Maxillary canine is the widest anterior tooth labiolingually
The cervical line curvature is towards incisally
The contact area is near the junction of the incisal and
middle third
Distal Aspect
Distal surface is very similar to the mesial surface
The cervical line exhibits less curvature
The distal surface is generally smaller, with resultant
shorter labial and lingual margins.
Height of contour is located at a more cervical level.
The contact are is near the middle third
Incisal Aspect
The labiolingual dimension is greater than the mesiodistaldimension
Maxillary canine is generally convex in both its labial andlingual outlines
The cusp tip is labial to the centre of the crownlabiolingually and mesial to the centre mesiodistally
The labial ridge and the cingulum are very noticeablefrom this aspect
Incisal aspect
MLF, mesiolingual fossa;
MCR, mesial cusp ridge;
DCR, distal cusp ridge;
DLF, distolingual fossa;
C, cingulum
Root Only one
Longest and strongest of all the teeth in the mouth
Mesial & distal surfaces of root have developmentaldepressions
From all aspects, the root tapers gradually to a sharp, orslightly blunted apex
Wider labiolingually than mesiodistally
Lingual and labial surfaces are convex
Labial aspect Lingual aspect
Mesial aspect Distal aspect
Incisal aspect
Mandibular Canine
Tooth Numbering Systems
UNIVERSAL SYSTEM - 22,27
ZSIGMONDY / PALMER - 3 3
FDI SYSTEM - 33, 43
Chronology
First evidence of calcification : 4-5 months
Enamel completed : 6-7 yr
Eruption : 9-10yrs
Root completed : 12-14yrs
Average Dimensions in millimeters
2.5 1.07.07.55.57.016.011.0
Curvature of Cervical
Line
M D
Labiolingual
Diameter at
Cervical Line
Labiolingual
Diameter at
Crest of Curvature
Mesiodistal
Diameter at
Cervical Line
Mesiodistal
Diameter at
Contact Area
Root
Length
Crown Length
Labial aspect
Mandibular canines are similar to maxillary canines
except that they are slightly narrower mesiodistally
Mesial outline of the crown is straight and inline with the
mesial outline of the root
The mesial cusp ridge is smaller than the distal cusp
ridge
Mesial outline : straight & obtuse mesioincisal angle
Distal outline : convex & rounded distoincisal angle
Incisal aspect : not sharp as max canine
Lingual aspect
Mesial, distal, and incisal outlines - These margins mimic
those of the labial aspect
Cingulum is less prominent and marginal ridges are less
distinct
Mesial and Distal aspects
These aspects are very similar and the cervical line
curves more on the mesial aspect
The contact area on mesial aspect is in the incisal third
and a little higher on the distal third
Incisal aspect
Like maxillary canine the labiolingual dimension is more
than the mesiodistal dimension
The cusp tip appears inclined in a lingual direction
Root
The root is shorter by 1 or 2 mm than max. canine
The developmental depression is more pronounced on
the lower canine
References CONCISE DENTAL ANATOMY & MORPHOLOGY :
JAMES L FULLER
DENTAL ANATOMY, PHYSIOLOGY & OCCLUSION:
WHEELER’S
TEXTBOOK OF DENTAL ANATOMY, PHYSIOLOGY &
OCCLUSION: RASHMI GS (PHULARI)
INTERNET
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