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morphology of maxillary & mandibular canine teeth
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Transcript of morphology of maxillary & mandibular canine teeth
![Page 1: morphology of maxillary & mandibular canine teeth](https://reader034.fdocuments.in/reader034/viewer/2022052318/587398e91a28ab85438b6101/html5/thumbnails/1.jpg)
MORPHOLOGY OF
PARMANENT CANINE
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Maxillary CanineLabial aspect The crown of maxillary canine is narrower
mesiodistally than that of maxillary central incisor.
The incisal aspect has a large cusp with a pointed cusp tip
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
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Labial aspect
Labial ridge
Cusp tip
Distal cusp ridge Mesial Cusp
Ridge
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Lingual aspect
The crown and root are narrower lingually
The cingulum is well developed, large and sometimes pointed like a cusp
Occasionally a well developed lingual ridge is seen that divides the lingual fossa into mesial and distal lingual fossae
Heavy marginal ridges are associated with well formed cingulum and fossae
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Lingual aspect
CingulumDistal marginal ridge
Distal lingual fossa
Lingual ridge
Mesial marginal ridge
Mesial lingual fossa
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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 the cusp (incisally)
The contact area is near the junction of the incisal and middle third
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Mesial aspect
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Distal aspect Distal surface is very similar to the mesial surface The cervical line exhibits less curvature The contact are is near the middle third
Distal aspect
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Incisal aspect
The labiolingual dimension is greater than the mesiodistal dimension
The cusp tip is labial to the centre of the crown labiolingually and mesial to the centre mesiodistally
The labial ridge and the cingulum are very noticeable from this aspect
Incisal aspect
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Root – only oneThe root is the longest and strongest of all the teeth in the dentition
The mesial and distal surfaces of the root have developmental depressions.
2.5 1.5 7.0 8.0 5.5 7.5 17.0 10.0
Curvature of Cervical Line M D
LabiolingualDiameter atCervical Line
LabiolingualDiameter atCrest of Curvature
MesiodistalDiameter atCervical Line
MesiodistalDiameter atContact Area
RootLength
Crown Length
Average Dimensions in millimeters
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Mandibular Canine
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
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Lingual aspect The lingual surface of the crown is smooth and
flat simulating the surface of mandibular lateral incisor
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
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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
The developmental depression is more pronounced on the lower canine
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Labial aspect Lingual aspect
Mesial aspect Distal aspect
Incisal aspect