Elevations on Surfaces of Crowns

Question 1

Tubercle

Answer 1

• small rounded projection found on the crowns of teeth
• extra formation of enamel
• not a normal or typical finding
• most likely location–>lingual surface of Mx anterior teeth

Question 2

Cingulum

Answer 2

lingual prominence of enamel on anterior teeth, rising incisally from the cervical line in varying proportions

Question 3

Mamelon

Answer 3

one of the 3 rounded prominences on the incisal ridge of a newly erupted unworn incisor

Question 4

Cusp

Answer 4

• pronounced point or elevation on or near the masticating surface of the crown of a tooth
• incisors don’t have cusps
• premolars have 2-3 cusps
• molars have 4 or more cusps

Question 5

Ridge

Answer 5

any linear elevation on the surface of a tooth (named according to its location)
(not a cusp, but may make up part of a cusp)

Question 6

Marginal Ridge

Answer 6

ridge of enamel on the mesial and distal margin of the occlusal surfaces of premolars and molars and the lingual surfaces of incisors and canines

Question 7

Triangular Ridge

Answer 7

ridge running from the point of a cusp toward the central portion of the occlusal surface of a posterior tooth

Question 8

Transverse Ridge

Answer 8

ridge formed by 2 triangular ridges, which join to form a continuous elevation of enamel across the occlusal surface of some posterior teeth

Question 9

Oblique Ridge

Answer 9

• ridge running obliquely across the occlusal surface of the maxillary molars
• formed by the union of the triangular ridge of the disto-buccal cusp with the distal cusp ridge of the mesio-lingual cusp

Question 10

Cusp Ridge

Answer 10

• elevation of enamel running from the point of a cusp toward the proximal surface
• four ridges: mesial, distal, buccal, lingual

Question 11

Cervical Ridge

Answer 11

any prominent ridge of enamel immediately adjacent to the cervical line

Question 12

Developmental Ridge

Answer 12

• elevation of enamel on the axial surfaces of a tooth running from the point of a cusp or the incisal edge toward the cervical line
• usually applied to facial or lingual surfaces