Dental Landmarks

Question 1

Cingulum

Answer 1

Bulge of enamel found on the cervical third of the lingual surface of an anterior tooth

Question 2

Cusp

Question 3

Cusp of Carabelli

Answer 3

Fifth cusp
Lingual surface of max. first molars
Not everyone has one

Question 4

Fissure

Answer 4

Fault occurring along a developmental groove
Caused by incomplete joining of the lobes
Two fissure cross to form a pit

Question 5

Fossa

Answer 5

A depression on the surface of a tooth

Question 6

Lingual fossa

Answer 6

A depression on the lingual surface of an incisor or cuspid

Question 7

Central fossa, max. molars

Answer 7

Valley in central portion of occlusal surface of max. molar

Question 8

Central fossa, mandibular molars

Answer 8

Valley in central portion of the occlusal surface of a mandibular molar

Question 9

Triangular fossa

Answer 9

Comparatively shallow pyramid-shaped depression on the occlusal surfaces of posterior teeth, located just within the mesial and/or distal marginal ridges

Question 10

Groove

Answer 10

Linear depression on the surface of a tooth

Question 11

Developmental groove

Answer 11

Groove formed by the union of two lobes during development of the crown

Question 12

Supplemental groove

Answer 12

Irregular, indistinct

Don’t indicate any major divisions of a tooth

Question 13

Incisal edge

Answer 13

Formed by junction of linguoincisal surfaces of an anterior tooth
Forms angle with the labial surface

Question 14

Lobe

Answer 14

Developmental segment of the tooth

As they develop, they form a single unit

Question 15

Mamelon

Answer 15

3 conves on the incisal ridge of a newly erupted incisor

Soon disappear as a result of wear

Question 16

ridge

Answer 16

Linear elevation on a tooth

Question 17

Cusp ridge

Answer 17

Elevation which extends in a mesial and distal direction from the cusp tip

Question 18

Incisal ridge

Answer 18

Incisal portion of a newly erupted anterior tooth

Question 19

Marginal ridge

Answer 19

Elevated crests/folds of enamel which form the mesial and distal margins of the occlusal surfaces of the post. teeth and the lingual surfaces of ant. teeth

Question 20

Oblique ridges

Answer 20

Elevated prominences on the occlusal surfaces of a max. molar
Extends diagonally from tip of mesiolingual cusp to distobuccal cusp

Question 21

Triangular ridges

Answer 21

Extend from tip of a cusp toward the central portion of the occlusal surface of a tooth at right angles

Question 22

Transverse ridges

Answer 22

Made up of the triangular ridges of a buccal and lingual cusp to form a more or less continuous elevation across the occlusal surface of a posterior tooth

Question 23

Sulcus

Answer 23

Elongated valley formed by the inclines of adjacent cusps or ridges which meet at an angle