Terminology

Question 1

Cusp

Answer 1

A pointed or rounded elevation of enamel found on canines and on the chewing surfaces of premolars and molars.

Question 2

Mand PM1

Answer 2

Buccal Cusp (Largest)

Lingual Cusp

Question 3

Mand PM2

Answer 3

Buccal Cusp (largest)

Mesiolingual Cusp (largest linguo)

Distolingual Cusp

Question 4

Max PM1 and PM2

Answer 4

Buccal Cusp

Lingual Cusp

Question 5

Max M1

Answer 5

Distobuccal

Distolingual

Mesiobuccal

Mesiolingual (Largest)

Cusp of Carbelli

Question 6

Mand M1

Answer 6

Mesiobuccal

Mesiolingual

Distobuccal

Distolingual

Distal

Question 7

Max M2

Answer 7

Distobuccal

Distolingual

Mesiobuccal

Mesiolingual (largest)

Question 8

Mand M2

Answer 8

Distobuccal

Distolingual

Mesiobuccal (can see down the most)

Mesiolingual

Question 9

Ridge

Answer 9

A linear elevation. It starts at a point elevation and extends down the surface.

Cusp Ridge: Named for direction they go away from cusp tip

qMesial ridge
qDistal ridge
qBuccal ridge
q Lingual ridge

A ridge that angles towards the central groove is also called a triangular ridge

Question 10

Marginal Ridge

Answer 10

Marginal ridge—A linear, rounded border of enamel that forms the mesial and distal margins of anterior teeth and the mesial and distal borders of occlusal surfaces on posterior teeth.

A linear elevation or elevated structure

Question 11

Transverse Ridge

Answer 11

Union of buccal and lingual triangular ridges that cross the surface of a posterior tooth transversely (roughly 90 degrees to both the buccal and lingual tooth surfaces).

Question 12

Oblique Ridge

Answer 12

The only tooth on which an oblique ridge is found is the maxillary molar.
Union between the triangular ridge of the distobuccal cusp and the distal cusp ridge of the mesiolingual cusp.

Question 13

Mesial Proximal Ridge

Answer 13

On proximal surface

: An elevated structure in the occlusal one-half to one-third of the proximal­ surface of the crown

Question 14

Mesial Proximal Concavity

Answer 14

: one depressed area

hash lines

Ridge is more occlusal than concavity

Question 15

Plane

Answer 15

ÙA cusp normally has four planes.
ÙThese planes are named by the direction that they face:
q Mesiolingual plane
qDistolingual plane
qMesiobuccal plane
qDistobuccal plane

An area bounded by two linear depressions and two linear elevations

Question 16

Pit

Answer 16

Small depression in enamel, usually located in a developmental groove where two or more enamel lobes are joined.

Usually found in the deepest area of a fossa

A pin or point-shaped depression

Central Pit

Mesial (Marginal) Pit

Distal (Marginal) Pit

Question 17

Groove

Buccal developmental groove

Mandibular 1st molar has two developmental grooves in the buccal.:

Mesiobuccal Developmental Groove

Distobuccal Developmental Groove

Answer 17

Linear depression where the primary parts of a tooth crown come together.

Triangular Groove:

A triangular grooves is named by the direction that it angles away from the marginal pit.

Question 18

Triangular Groove:

Answer 18

A triangular grooves is named by the direction that it angles away from the marginal pit. Starts in pit and angles twd the point angle

Question 19

Crest of Contour of a Posterior Tooth

Question 20

Crest of Contour of an Anterior Tooth

Question 21

Cingulum

Answer 21

nCingulum - a large rounded elevation on the lingual surface of all permanent and deciduous anterior teeth.
nThe cingulum encompasses the entire cervical third of the lingual surface.

Question 22

Fossa

Answer 22

nFossa - an irregular, usually rounded or triangular depression or concavity on the crown of a tooth. (Plural - fossae)
nThere is normally a rather large, shallow fossa on the lingual surface of anterior teeth.
Posterior teeth exhibit two or more fossae of varying size and shape on the occlusal surface

Question 23

Triangular Fossa

Answer 23

Located adjacent to marginal ridges on the occlusal surfaces of posterior teeth.

A depressed area. It is bounded by two linear depressions and a linear elevation

Question 24

Lingual Fossa

Answer 24

An irregular, rounded concavity bound by the mesial marginal ridge, distal marginal ridge, cingulum, and incisal edge of the lingual surface of an incisor tooth.

Question 25

Embrasure

Answer 25

Triangular space diverging from the contacting proximal surfaces of two adjacent teeth.

Labial/Buccal
Lingual

The gingival embrasure is also known as the cervical embrasure or interproximal space.

Occlusal