osce teeth

Question 1

Has one or two lingual cusps more closely approximating the buccal cusp in height

Answer 1

lower second PM

Question 2

pulp cavity tapers evenly along the entire length until reaching the apical constriction

Answer 2

upper central incisor

Question 3

Cervical region undulates on the mesial and distal sides of the tooth, mesial undulation being greater than the distal.

Answer 3

upper central incisor

Question 4

Small groove often runs from the mesial pit onto the mesio lingual surface

Answer 4

lower first PM

Question 5

Often has enamel extending further apically on the labial side than the lingual side

Answer 5

lower canine

Question 6

Crown appears flat and almost symmetrical.

Answer 6

lower central

Question 7

Occlusal surface is more symmetrical with only slight mesial displacement of the lingual cusp

Answer 7

upper second PM

Question 8

Incisal edges shows three mammelons

Answer 8

upper central incisor

Question 9

Slightly rounded mesio incisal angle and a short distal surface with a pronounced rounding of the disto incisal angle.

Answer 9

upper lateral incisor

Question 10

Triangular occlusal surface

Answer 10

upper second molar

Question 11

The distal marginal ridge is more cervical than the mesial marginal ridge

Answer 11

upper second PM

Question 12

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.

Answer 12

upper first molar

Question 13

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.

Answer 13

lower first molar

Question 14

Mesial border is shorter and less steeply inclined than the distal border.

Answer 14

upper canine

Question 15

Lingual surface is slightly narrower and much lower than the buccal surface

Answer 15

lower first PM

Question 16

Amelocemental junction is at the same level on labial and lingual side of the crown.

Answer 16

upper canine

Question 17

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.

Answer 17

lower first molar

Question 18

Viewed from the incisal edge the crown is slightly twisted on the root to follow the dental arch.

Answer 18

lower lateral

Question 19

There is no developmental depression on the mesial surface of the crown

Answer 19

upper second PM

Question 20

Mesial contact is located more incisally. Distal contact is located at the centre of the middle third of the crown.

Answer 20

upper canine

Question 21

Mesial root has two canals, one buccal and one lingual. Single root in distal canal, wide and less curved.

Answer 21

lower first molar

Question 22

Distal marginal ridge is more cervical than the mesial marginal ridge

Answer 22

lower second PM

Question 23

The palatal surface is slightly lower and much narrower than the buccal surface

Answer 23

upper first PM

Question 24

buccal surfaces of the crown and the root in a straight line

Answer 24

upper PMs

Question 25

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

Answer 25

upper first PM

Question 26

Fissure pattern is plus shaped.

Answer 26

lower second molar

Question 27

buccal cusp inclined lingually to produce a curved buccal profile

Answer 27

lower PMs

Question 28

flat mesial surface

Answer 28

upper second PM

Question 29

The apical part of the root usually has a marked distal curvature

Answer 29

upper first PM

Question 30

Distal root is not visible from the mesial aspect. Mesial root is curved, grooved or broader than the distal root

Answer 30

lower first molar

Question 31

Convex shape, middle region is heightened to a prominent ridge running longitudinally to the end tip of the cusp

Answer 31

upper canine

Question 32

Mesial and distal marginal ridges border the concavity, and the lingual portion of the incisal edge and cingulum.

Answer 32

upper central incisor

Question 33

Lingual cusp is much larger than that of the first and is displaced mesially

Answer 33

lower second PM

Question 34

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.

Answer 34

lower central

Question 35

The lingual surface is concave, with mesial and distal marginal ridges which meet at the neck of the tooth to form a convex cingulum.

Answer 35

upper central incisor

Question 36

a more rounded incisal edge and both mesial and distal corners are rounded.

Answer 36

upper lateral incisor

Question 37

Flatter mesiodistally and appears more narrow and slender compared to its antagonist

Answer 37

lower canine

Question 38

Lingual topography gives a scooplike form to the crown.

Answer 38

upper central incisor

Question 39

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.

Answer 39

upper first molar

Question 40

Palatal root is often partially fused with either of the buccal roots

Answer 40

upper second PM

Question 41

From the mesial or distal aspect, the crown is wedge shaped and leans lingually. The cervical undulation is greater on the mesial surface.

Answer 41

lower lateral

Question 42

Fissure on the distal side runs parallel to the oblique ridge and continues on to the palatal surface

Answer 42

upper first molar

Question 43

Root is irregularly oval. Usually slightly grooved both mesially and distally.

Answer 43

upper canine

Question 44

most heavily restored root in adult dentition

Answer 44

lower first molar

Question 45

There may be two lingual cusps, and if so the mesial cusp is the larger

Answer 45

lower second PM

Question 46

Concave lingual surface. Often divided into two shallow fossae by a ridge connecting the cusp.

Answer 46

upper canine

Question 47

Less bulky and more slender.

Answer 47

upper lateral incisor

Question 48

Convex distal surface

Answer 48

upper first PM

Question 49

Diamond shaped occlusal surface. Mesiopalatal cusp is the largest, the distopalatal is the smallest.

Answer 49

upper first molar

Question 50

Labial surface is inclined lingually bringing the cusp into lingual position.

Answer 50

lower canine

Question 51

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

Answer 51

lower second molar

Question 52

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

Answer 52

upper first PM

Question 53

Buccal surface is inclined strongly lingually, so that its tip lies almost above the centre of the tooth

Answer 53

lower first PM

Question 54

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.

Answer 54

upper lateral incisor

Question 55

Stout crown with a broad diamond shaped surface and pointed cusp.

Answer 55

upper canine

Question 56

Lingual root is in the same plane as the disto buccal root.

Answer 56

upper first molar

Question 57

Two buccal cusps are similar in circumference and height, but the mesial one is larger.

Answer 57

upper first molar

Question 58

Distal fossa is generally larger than the mesial

Answer 58

lower second PM

Question 59

The mesial surface is convex

Answer 59

upper second PM

Question 60

Ridges are less prominent, the mesial border of the cusp is shorter and less steely inclined than the distal border.

Answer 60

lower canine

Question 61

The outline form of the root of the cervical level is typically triangular with rounded corners

Answer 61

upper central incisor

Question 62

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.

Answer 62

upper first PM

Question 63

The curvature of the cervical margin on the distal surface is less marked than that on the mesial surface

Answer 63

upper canine

Question 64

The buccal surface is larger than the lingual surface, and is lingually inclined.

Answer 64

lower first molar

Question 65

Cervical region is narrowed mesiodistally and gives a long mesial surface

Answer 65

upper lateral incisor

Question 66

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

Answer 66

lower first PM

Question 67

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

Answer 67

upper first PM

Question 68

Crown set in straight line with the root when viewed from the proximal side.

Answer 68

upper canine

Question 69

High and narrow crown set an angle to the root, producing a more convex labial profile from cusp to apex.

Answer 69

lower canine

Question 70

Cone shaped root that is round in cross section.

Answer 70

upper central incisor

Question 71

Only 15% have two roots, and the single root is usually deeply grooved

Answer 71

upper second PM

Question 72

Failure to consider pulp morphology when preparing the canals may result in inappropriate root canal treatment.

Answer 72

upper first molar

Question 73

Pulp chamber is centred within the dentine of the root. Narrowest part of the canal is found to be at the apical constriction

Answer 73

upper central incisor

Question 74

Tubercle of carabelli may be present on the palatal surface of the mesio palatal cusp. Found on 60% of all maxillary first molars.

Answer 74

upper first molar

Question 75

a second mesiobuccal canal which is present in over 60% of cases

Answer 75

upper first molar

Question 76

Groove starting on the buccal surface deepens into transverse fissure across the occlusal surface and ends as a groove on the lingual surface

Answer 76

lower first molar

Question 77

Buccal surface usually has a pit with an increased risk of caries.

Answer 77

lower first molar

Question 78

Much greater difference in buccal and lingual cusp height

Answer 78

lower first PM

Question 79

Crown is wedge shaped and leans lingually

Answer 79

upper central incisor

Question 80

Lingual cusps are highest, but the mesio buccal cusp is the largest.

Answer 80

lower second molar

Question 81

Mesio incisal edge is sharp and the distoincisal edge more rounded.

Answer 81

upper central incisor

Question 82

Two cusps are similar in width and height, due to a reduction in the size of the buccal cusp.

Answer 82

upper second PM

Question 83

Disto palatal cusp is greatly reduced or absent

Answer 83

upper second PM

Question 84

Crown is the largest of the four incisors being as almost as wide as it is long. Smooth surface and slightly convex.

Answer 84

upper central incisor

Question 85

Mesial marginal ridge is more cervical than the distal marginal ridge

Answer 85

lower first PM

Question 86

. Pulp cavity is widest about the cervical level.

Answer 86

upper central incisor

Question 87

Roots are less divergent than those of the lower first molar and may be fused.

Answer 87

lower second molar