Length of maxillary central incisors
No of roots
Shape
22.5mm
One root
Triangular
Length of maxillary lateral incisors
No of roots
Shape
21mm
One root
Triangular
Length of maxillary canine
No of roots
Shape
26.5mm
One root
Oval shaped
Length of maxillary first premolar
No of roots
Shape
21mm
Generally has two roots/ two canals but cases with one root or three roots occur.
The access cavity is oval in shape, cut buccopalatally between the cusp tips, wider bucopalatally than mesiodistally
Length of maxillary second premolar
No of roots
Shape
21.5mm
It may also have 2 canals merging to form 1 apically
Oval
Length of maxillary first molar
No of roots
Shape
21mm
It usually has 3 roots – palatal, mesiobuccal and distobuccal with 3-4 root canals
Trapezoid?
Length of maxillary second molar
No of roots
Shape
20mm
Three
Usually has 3 root canals which are sometimes fused
Length of maxillary third molar
No of roots
Shape
17mm
Three?
Varies
Length of mandibular central and lateral incisors
No of root canals
Shape
21mm
Root canal formation in the mandibular incisors can be varied, with a single canal from orifice to apex or a single canal which bifurcates with 2 canal or sometimes, 2 separate canals.
Ovoid
Length of mandibular canines
No of root canals
Shape
22.5mm
usually has 1 root with a single canal but sometimes have 2 canals.
On rare occasions, it may have 2 roots
The root canal is oval in cross-section coronally and becomes round in the apical region
Length of Mandibular first premolar
No of root canals
Shape
21.5mm
Usually has 1 root and 1 canal but sometimes the single canal may divide to form a second canal
Ovoid
Length of Mandibular second premolar
No of root canal
Shape
22.5mm
It is very similar to the 1st premolar but the occurrence of the 2nd canal is very much lower
Usually has a single root with one root canal
access cavity is oval in shape
Length of Mandibular first molar
No of root canals
Shape
21mm
Usually has 2 roots – mesial and distal roots and 3 canal but teeth with 3 roots and 4 or 5 canals has been reported.
The distal root usually has one large oval canal but sometimes, 2 canals are seen
Length of mandibular second molar
No of root canals
Shape
20mm
2 roots with 3 canals
Length of mandibular 3rd molar
No of canal
Shape
17.5
1,2,3
