Intro to Tooth Morphology

Question 1

Name the arches of the head?

Answer 1

Maxillary arch (top)Mandibular arch (bottom)

Question 2

Name each quadrant of the head?

Answer 2

Right and left maxillary quadrantRight and left mandibular quadrant

Question 3

Give the specific name to each tooth

Answer 3

Central and lateral incisorsCanine1st and 2nd premolar1st, 2nd and 3rd molar

Question 4

Describe the shape of the incisors?

Answer 4

Like a thin blade

Question 5

Describe the shape of the canines?

Answer 5

Cone-shaped crown

Question 6

Describe the shape of the premolars and molars?

Answer 6

A mountain range with a low valley at the centre

Question 7

FDI (nomenclature example)

Answer 7

Two-digit systemSplit into quadrants1 | 23 | 4e.g. central incisors will be 11/1221/2231/3241/42

Question 8

Palmer notation (nomenclature example)

Answer 8

Split into quadrantsEach tooth numbered (1-8)e.g. | (1) number in box | (1)

Question 9

What is the basic tooth structure?

Answer 9

ApexRootCement Enamel JunctionCrownIncisal edge

Question 10

What is the surface for the anterior teeth?

Answer 10

Labial (but appropriate also named buccal)

Question 11

What is the surface for the posterior teeth?

Answer 11

Buccal

Question 12

What is the biting surface of the incisors and canines called?

Answer 12

Incisal

Question 13

What is the biting surface of the premolars and molars?

Answer 13

Occlusal

Question 14

Explain how a tooth can be divided into 3rds for surface descritpion?

Answer 14

For purposes of description, the crowns and roots of teeth have been divided into thirds, and junctions of the crown surfaces are described as line angles or point angels

Question 15

What is the cusp? (tooth surfaces)

Answer 15

The elevation of thecrown portion of a toothmaking up a divisional partof the occlusal surface

Question 16

What is the ridge? (tooth surfaces)

Answer 16

The linear elevation onthe surface of a tooth andis named according to itslocation

Question 17

What is the Marginal Ridge? (tooth surfaces)

Answer 17

The rounded borders of the enamels that form the proximal margins of the occlusal surfaces of premolars and molars and the proximal margins of the lingual surfaces of the anterior teeth

Question 18

What is the Tubercle? (tooth surfaces)

Answer 18

A smaller elevationon some portion of the crownproduced by an extraformation of enamel (deviationsform the typical form)

Question 19

What is the Cingulum? (tooth surfaces)

Answer 19

Lingual lobe of an anterior tooth. It makes up the bulk of the cervical third of the lingual/palatal surfaces

Question 20

What is the Lobe? (tooth surfaces)

Answer 20

One of the primarysections of formation in thedevelopment of the crown

Question 21

What is the Mamelon? (tooth surfaces)

Answer 21

Any one of the threerounded protuberances foundon the incisal ridges of newlyerupted incisor teeth

Question 22

What are the triangular ridges? (tooth surfaces)

Answer 22

Descend from the tips of the cusp of posterior teethtowards the central part of the occlusal surfaces. They are named after thecusps to which they belong(behind the front teeth)

Question 23

What is the transverse ridge? (tooth surfaces)

Answer 23

The union of two triangular ridges crossingtransversely the surface of a posterior tooth

Question 24

What is the oblique ridge? (tooth surfaces)

Answer 24

a ridge crossing obliquely the occlusal surfaces of maxillarymolars and formed by the union of the triangular ridge of the distobuccal (DB) cusp and the distal cusp ridge of the mesiopalatal (MP) cusp

Question 25

What is the Fossa? (tooth surfaces)

Answer 25

Irregular depression or concavity

Question 26

What is the lingual fossa? (tooth surfaces)

Answer 26

Lingual surfaces ofincisors

Question 27

What is the central fossae? (tooth surfaces)

Answer 27

Occlusal surface ofmolars. Formed by the convergence of ridges termination at a central point in the bottom of the depression where there is ajunction of grooves

Question 28

What is the triangular fossae? (tooth surfaces)

Answer 28

Found on occlusalsurfaces of posterior teeth mesial or distal to marginal ridges. Sometimes on palatalsurfaces of maxillary incisors at the edge of the lingual fossae where the marginal ridge (MR) and the cingulum (CI) meet

Question 29

What is the sulcus? (tooth surfaces)

Answer 29

The long depression or valley in the surface of a tooth between ridges andcusps, the inclines of which meet at an angle. A sulcus has a developmental groove at the junction of its inclines

Question 30

What is the developmental groove? (tooth surfaces)

Answer 30

Shallow groove or line between the primary parts of the crown or root

Question 31

What is the supplemental groove? (tooth surfaces)

Answer 31

Shallow lineardepression on the surface of a tooth (Supplemental to a developmental grooveand does not mark the junction of primaryparts)

Question 32

What is a pit? (tooth surfaces)

Answer 32

Small pinpoint depression located at the junction of developmental grooves orat terminals of those grooves.