Mesial surface is convex only in its occlusal half, its cervical half is concave This concavity continues on to the cervical region of the root - it is called the canine fossa distal side is very convex
upper first premolar
The two cusps are separated by a sharp fissure running mesio-distally which does not reach the marginal ridges
upper second premolar
which incisors has a more mesio-distally narrowed cervical region
upper lateral
which tooth has its mesial marginal ridge more cervical than its distal marginal ridge
lower first premolar
The two cusps are similar in height due to the reduction of the buccal cusp
upper second premolar
occlusal surface is roughly oval buccal cusp is wider and higher than the lingual cusp
upper first premolar
occlusal surface is diamond shaped
upper 6
The mesial fissure has a right angled bend - one arm runs towards the mesial surface but does not continue onto it and the other runs towards and on to the buccal surface
upper 6
The ridge and fissure separate the small disto-palatal cusp from the rest of the occlusal surface
upper 6
small cingulum in the cervical area and an almost flat incisal half
lower lateral
A tubercle of Carabelli may be present on the palatal surface of the mesio-palatal cusp
upper 6
3 roots are much less divergent palatal root is often partially fused with either of the buccal roots
upper 7
which tooth has the largest crown of the 4 incisors and is almost as wide as it is long
upper central
tooth has a pit on its buccal surface which is at increased risk of caries
lower 6
The occlusal surface is almost square The fissure pattern is + shaped
lower 7
distal side of the crown flares out at an angle from the root
lower lateral
which tooth has a cone shaped root which is usually round in cross section
upper central
The distal root is not visible from the mesial aspect as the mesial root is usually curved, grooved and broader than the distal root
lower 6
single root is flattened mesiodistally giving an oval cross section
upper lateral
groove starting on the buccal surface deepens into the transverse fissure across the occlusal surface and ends as a groove on the lingual surface - in the surface of the crown it deepens further to form a pit
lower 6
buccal surface of the tooth is strongly inclined lingually so that its tip lies almost above the centre of the tooth
lower first premolar
single palatal root is the longest and strongest being slightly compressed bucco-lingually
upper 6
The occlusal surface is more symmetrical and smaller than the lower first molar There are usually only four cusps of similar size
lower 7
crown is wedge shaped and leans lingually when viewed from mesial/distal aspect
lower lateral
the contact point with the canine mesially takes the form of a smaller semicircular arc compared with a broad contact area distally where it contacts the second premolar
lower first premolar
mesial root is broader than distal root but distal root is usually longer
lower 7
which tooth has a distal fossa that is generally larger than the mesial fossa
lower second premolar
has a longitudinal ridge which runs from the cusp tip to the cingulum and a labial ridge
upper canine
The shape of the crown is more triangular The disto-palatal cusp is greatly reduced and it may be absent
upper 7
what tooth sometimes have mamellons
upper central
There is a slight mesial displacement of the lingual cusp but the occlusal surface is more symmetrical with only a slight mesial displacement of the lingual cusp
upper second premolar
lingual surface is concave-convex and has 2 pronounced marginal ridges
upper lateral
The distal root depression is deeper than the mesial depression (the opposite of the maxillary first premolars)
upper second premolar
the longer diagonal extends from the mesio-buccal to the disto-palatal cusp and emphasised by the presence of a strong ridge of enamel
upper 6
The two cusps are seperated by a sharp fissure running mesiodistally which does not reach the distal marginal ridge but extends to the mesial marginal ridge on to the mesial surface
upper first premolar
buccal cusp looks like that of a canine
upper first premolar
fissures join to make an H shape
upper 6
where marginal ridges meet at the cervix they enclose a fossa/depression which can often be prone to caries
upper lateral
