osce teeth Flashcards
Has one or two lingual cusps more closely approximating the buccal cusp in height
lower second PM
pulp cavity tapers evenly along the entire length until reaching the apical constriction
upper central incisor
Cervical region undulates on the mesial and distal sides of the tooth, mesial undulation being greater than the distal.
upper central incisor
Small groove often runs from the mesial pit onto the mesio lingual surface
lower first PM
Often has enamel extending further apically on the labial side than the lingual side
lower canine
Crown appears flat and almost symmetrical.
lower central
Occlusal surface is more symmetrical with only slight mesial displacement of the lingual cusp
upper second PM
Incisal edges shows three mammelons
upper central incisor
Slightly rounded mesio incisal angle and a short distal surface with a pronounced rounding of the disto incisal angle.
upper lateral incisor
Triangular occlusal surface
upper second molar
The distal marginal ridge is more cervical than the mesial marginal ridge
upper second PM
Longer diagonal extending from the mesiobuccal to the distopalatal cusp and emphasised by the presence of a strong ridge of enamel called the oblique ridge. On each side of the oblique ridge there is a fissure.
upper first molar
In the centre of the crown, it deepens further to form a pit. Another fissure runs mesiodistally and starts near the mesial marginal ridge to cross the central fossa and divide into two branches which pass on each side of the small distal cusp.
lower first molar
Mesial border is shorter and less steeply inclined than the distal border.
upper canine
Lingual surface is slightly narrower and much lower than the buccal surface
lower first PM
Amelocemental junction is at the same level on labial and lingual side of the crown.
upper canine
Two roots, one mesial and one distal. Both are strongly compressed mesiodistally and may show a distal curvature. These features are most pronounced on the mesial root. Mesial root is usually curved, grooved and broader than the distal root.
lower first molar
Viewed from the incisal edge the crown is slightly twisted on the root to follow the dental arch.
lower lateral
There is no developmental depression on the mesial surface of the crown
upper second PM
Mesial contact is located more incisally. Distal contact is located at the centre of the middle third of the crown.
upper canine
Mesial root has two canals, one buccal and one lingual. Single root in distal canal, wide and less curved.
lower first molar
Distal marginal ridge is more cervical than the mesial marginal ridge
lower second PM
The palatal surface is slightly lower and much narrower than the buccal surface
upper first PM
buccal surfaces of the crown and the root in a straight line
upper PMs
Well defined developmental groove in the enamel of the mesial marginal ridge which is in alignment with the developmental depression on the mesial surface of the root but is not usually connected with it. The groove is continuous with the central groove of the occlusal surface
upper first PM
Fissure pattern is plus shaped.
lower second molar
buccal cusp inclined lingually to produce a curved buccal profile
lower PMs
flat mesial surface
upper second PM
The apical part of the root usually has a marked distal curvature
upper first PM
Distal root is not visible from the mesial aspect. Mesial root is curved, grooved or broader than the distal root
lower first molar
Convex shape, middle region is heightened to a prominent ridge running longitudinally to the end tip of the cusp
upper canine
Mesial and distal marginal ridges border the concavity, and the lingual portion of the incisal edge and cingulum.
upper central incisor
Lingual cusp is much larger than that of the first and is displaced mesially
lower second PM
When viewed from above, the line of the incisal edge is perpendicular to a line bisecting the root. The distoincisal angle is marginally rounder than the mesio incisal angle.
lower central
The lingual surface is concave, with mesial and distal marginal ridges which meet at the neck of the tooth to form a convex cingulum.
upper central incisor
a more rounded incisal edge and both mesial and distal corners are rounded.
upper lateral incisor
Flatter mesiodistally and appears more narrow and slender compared to its antagonist
lower canine
Lingual topography gives a scooplike form to the crown.
upper central incisor
Mesial surface has a right angled bend. One arm runs toward the mesial surface, but does not continue onto it. The other runs toward and on to the buccal surface.
upper first molar
Palatal root is often partially fused with either of the buccal roots
upper second PM
From the mesial or distal aspect, the crown is wedge shaped and leans lingually. The cervical undulation is greater on the mesial surface.
lower lateral
Fissure on the distal side runs parallel to the oblique ridge and continues on to the palatal surface
upper first molar
Root is irregularly oval. Usually slightly grooved both mesially and distally.
upper canine
most heavily restored root in adult dentition
lower first molar
There may be two lingual cusps, and if so the mesial cusp is the larger
lower second PM
Concave lingual surface. Often divided into two shallow fossae by a ridge connecting the cusp.
upper canine
Less bulky and more slender.
upper lateral incisor
Convex distal surface
upper first PM
Diamond shaped occlusal surface. Mesiopalatal cusp is the largest, the distopalatal is the smallest.
upper first molar
Labial surface is inclined lingually bringing the cusp into lingual position.
lower canine
Mesial canals are closer together, incidence of two canals is less. If the distal root has one canal, the distal canal orifice is larger and located distal to the centre of the crown
lower second molar
The cusps are separated by a sharp fissure running mesiodistally, which does not reach the distal marginal ridge but often extends across the mesial marginal ridge on to the mesial surface
upper first PM
Buccal surface is inclined strongly lingually, so that its tip lies almost above the centre of the tooth
lower first PM
Lingual surface has two pronounced marginal ridges. Sometimes, where the ridges meet at the cervix, they enclose a depression or fossa. Deposits can accumulate here and lead to caries.
Crown is wedge shaped when viewed mesially or distally. As with the central incisor, the cervical undulation is greater on the mesial surface.
upper lateral incisor
Stout crown with a broad diamond shaped surface and pointed cusp.
upper canine
Lingual root is in the same plane as the disto buccal root.
upper first molar
Two buccal cusps are similar in circumference and height, but the mesial one is larger.
upper first molar
Distal fossa is generally larger than the mesial
lower second PM
The mesial surface is convex
upper second PM
Ridges are less prominent, the mesial border of the cusp is shorter and less steely inclined than the distal border.
lower canine
The outline form of the root of the cervical level is typically triangular with rounded corners
upper central incisor
More than 50% have two roots – one buccal and one lingual. Mesial surface is more deeply grooved than the distal and shows a concavity in the cervical region.
upper first PM
The curvature of the cervical margin on the distal surface is less marked than that on the mesial surface
upper canine
The buccal surface is larger than the lingual surface, and is lingually inclined.
lower first molar
Cervical region is narrowed mesiodistally and gives a long mesial surface
upper lateral incisor
Contact point with the canine takes the form of a smaller semi circular arc compared with a broad contact area distally where it contacts the second premolar
lower first PM
Oval occlusal surface, buccal cusp is wider and higher than the lingual cusp. Marked mesial displacement of the lingual cusp. The two cusps are joined by marginal ridges, of which the mesial is higher
upper first PM
Crown set in straight line with the root when viewed from the proximal side.
upper canine
High and narrow crown set an angle to the root, producing a more convex labial profile from cusp to apex.
lower canine
Cone shaped root that is round in cross section.
upper central incisor
Only 15% have two roots, and the single root is usually deeply grooved
upper second PM
Failure to consider pulp morphology when preparing the canals may result in inappropriate root canal treatment.
upper first molar
Pulp chamber is centred within the dentine of the root. Narrowest part of the canal is found to be at the apical constriction
upper central incisor
Tubercle of carabelli may be present on the palatal surface of the mesio palatal cusp. Found on 60% of all maxillary first molars.
upper first molar
a second mesiobuccal canal which is present in over 60% of cases
upper first molar
Groove starting on the buccal surface deepens into transverse fissure across the occlusal surface and ends as a groove on the lingual surface
lower first molar
Buccal surface usually has a pit with an increased risk of caries.
lower first molar
Much greater difference in buccal and lingual cusp height
lower first PM
Crown is wedge shaped and leans lingually
upper central incisor
Lingual cusps are highest, but the mesio buccal cusp is the largest.
lower second molar
Mesio incisal edge is sharp and the distoincisal edge more rounded.
upper central incisor
Two cusps are similar in width and height, due to a reduction in the size of the buccal cusp.
upper second PM
Disto palatal cusp is greatly reduced or absent
upper second PM
Crown is the largest of the four incisors being as almost as wide as it is long. Smooth surface and slightly convex.
upper central incisor
Mesial marginal ridge is more cervical than the distal marginal ridge
lower first PM
. Pulp cavity is widest about the cervical level.
upper central incisor
Roots are less divergent than those of the lower first molar and may be fused.
lower second molar
