Ch.9 Tooth Morphology

Front 1

Study of the structure and form of the teeth

Back 1

Tooth morphology

Front 2

Dentition

Back 2

Natural teeth in position

Front 3

Deciduous dentition consists of what?

Back 3

20 teeth. 10 and a charge and 5 in each quadrant.

Front 4

What does the primary dentition lack that the permanent dentition has?

Back 4

Premolars and third molar

Front 5

Permanent dentition consist of what?

Back 5

32 teeth. 16 in each Arch and eight in each quadrant.

Front 6

What teeth are used to pulverize food

Back 6

Premolars. They break down food into smaller pieces.

Front 7

Which teeth are used to cut or bite food?

Back 7

Central incisor

Front 8

What tooth is used for tearing?

Back 8

The canine

Front 9

What tooth is used for cutting?

Back 9

Lateral incisor

Front 10

Which teeth are used to chew food?

Back 10

Molars

Front 11

At what ages do teeth start to erupt and by what age should all teeth be erupted?

Back 11

Teeth start erupting around 6 months. All 20 teeth are normally erupted by Age 3.

Front 12

What ages will mixed dentition usually occur?

Back 12

Between the ages of 6 and 12.

Front 13

When does permanent dentition usually begin to erupt?

Back 13

From age 6 usually ending between 17 to 21 years of age.

Front 14

What are succedaneous teeth?

Back 14

Permanent teeth that replace primary teeth.

Front 15

Which teeth are nonsuccedaneous?

Back 15

The molars

Front 16

Anatomical crown

Back 16

Portion of the tooth that is covered with enamel

Front 17

Clinical crown

Back 17

Portion of the crown that is visible in the mouth

Front 18

Anatomical root

Back 18

Portion covered with cementum

Front 19

Clinical root

Back 19

Portion of the root seen in the oral cavity

Front 20

Cervical line

Back 20

Divides the crown and the root. The anatomical crown and root join together here

Front 21

incisal third

Back 21

Area on the crown of the tooth that is nearest The incisal Edge on the anterior tooth

Front 22

Occlusal third

Back 22

Occlusal surface of the posterior tooth

Front 23

Cervical third

Back 23

Area on the crown of the tooth that is closest to the gingiva

Front 24

Middle third

Back 24

Area between the incisal third and the cervical third

Front 25

Apical third

Back 25

Area nearest the Apex

Front 26

Cervical third of root

Back 26

Area nearest the crown of the tooth

Front 27

Middle third of root

Back 27

Area between the apical third and the cervical third of root

Front 28

Contact area

Back 28

Where the proximal sides of two teeth come together and touch. Normally the media loved one tooth in the distal of another.

Front 29

Diastema

Back 29

Space or gap between teeth. Typically and the front teeth

Front 30

Embrasure

Back 30

Triangular space in the gingival direction when two adjacent teeth are in contact

Front 31

Buccal groove

Back 31

Linear depression forming a Groove that extends from the middle of the buccal surface to the occlusal surface of the tooth

Front 32

Cingulum

Back 32

Convex area on the lingual surface of the anterior teeth near the gingiva

Front 33

Cusp of Carabelli

Back 33

Fifth cusp located on the medial lingual surface of most maxillary first molars

Front 34

Developmental Groove

Back 34

Groove formed by the uniting of lobes during development of the crown of the tooth

Front 35

Fissure

Back 35

Developmental Groove resulting from an imperfect Union where the lobes come together. Decay often initiate here

Front 36

Fossa

Back 36

Shallow rounded or angular depression

Front 37

Furcation

Back 37

Dividing point of a multi rooted tooth

Front 38

Marginal ridges

Back 38

Elevated area of enamel that forms the mesial and distal borders of the lingual surface of the anterior teeth and the Mesial and distal borders of the occlusal surface of the posterior teeth.

Front 39

Oblique Ridge

Back 39

Elevated area of enamel that extends obliquely across the occlusal of the tooth.

Front 40

Pit

Back 40

Places where the grooves come together or the fissures cross. Decay often begins in the pit

Front 41

Ridge

Back 41

Linear elevation of enamel found on the tooth

Front 42

Supplemental groove

Back 42

Shallow linear Groove that radiates from the developmental Groove. Gives the tooth surface a wrinkled look.

Front 43

Transverse Ridge

Back 43

Union of two triangular ridges that produces a single Ridge of elevation across the occlusal surface of a posterior tooth

Front 44

Triangular ridge

Back 44

Ridge or an elevation that descends from the cusp and widens as it runs down to the middle area of the occlusal surface