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ORAL ANATOMY > TOOTH MORPHOLOGY > Flashcards

TOOTH MORPHOLOGY Flashcards

1
Q

This is the portion of the tooth covered with enamel

A

Crown

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2
Q

This is the portion of the tooth covered with
cementum, it can be mono-rooted, bi-rooted (2),
multi-rooted (3 roots).

A

Root

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3
Q

What are the 4 major tissues of the tooth?

A

Enamel, dentin, pulp, and cementum

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4
Q

What are the hard tissues of the tooth?

A

Enamel, dentin, and cementum

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5
Q

What is the soft tissue of the tooth?

A

Pulp

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6
Q

This is the white, protective external surface layer of the anatomic crown; it is highly calcified or mineralized; the hardest substance in the body; it develops from the enamel organ(ectoderm); a product of specialized epithelial cells called ameloblasts

A

Enamel

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7
Q

This is the hard yellowish tissue underlying the
enamel and cementum; it makes up the major bulk of the inner portion of each tooth crown and root; it develops from the embryonic dental papilla
(mesoderm); the cells that form this are called
odontoblast

A

Dentin

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8
Q

What are the two junctions?

A

Cementodentinal junction and Dentinoenamel junction

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9
Q

It is the inner surface of the enamel
cap where enamel joins dentin

A

Dentinoenamel junction

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10
Q

This is the inner surface of cementum where cementum joins dentin

A

Cementodentinal junction

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11
Q

This is the dull yellow external layer of the tooth
root; it is very thin, especially next to the cervical
line; it develops from the dental sac (mesoderm); it is produced by cells called cementoblasts

A

Cementum

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12
Q

This separates the enamel of the crown from
the cementum of the anatomic root, this junction is also known as the cervical line, denoting that it surrounds the neck or cervix of the tooth.

A

Cementoenamel junction

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13
Q

This is the soft tissue in the cavity or space in the
center of the crown and root called the pulp cavity; it develops from the dental papilla (mesoderm)

A

Pulp

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14
Q

This is the cavity which contains the coronal pulp

A

Pulp chamber

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15
Q

This is located in the crown area

A

Coronal pulp

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16
Q

This contains the radicular pulp

A

Root canal

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17
Q

This is the pulp in the root area

A

Radicular pulp

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18
Q

This is the anatomic area at the tip/end of the root.

A

Apex

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19
Q

This is the opening at the apex of the root of a tooth, through which the nerve and blood vessels that supply the dental pulp pass.

A

Apical foramen

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20
Q

This is that part of the tooth normally covered by an enamel layer.

A

Anatomic crown

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21
Q

This refers specifically to the amount of tooth visible in the oral cavity

A

Clinical crown

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22
Q

This is defined as the supporting tissues of the teeth in the mouth, including surrounding alveolar bone, the gingiva, the periodontal ligament, and the outer, cementum layer of the tooth roots.

A

Periodontium

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23
Q

This is the portion of the upper (maxillary) or lower (mandibular) bones that surrounds the roots of the teeth.

A

Alveolar bone

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24
Q

This is the part of the soft tissue in the mouth that covers the alveolar bone of the jaws.

A

Gingiva

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25
Q

This is firmly bound to the underlying alveolar
bone; the portion of the gingiva extending from
the gingival margin to the alveolar mucosa

A

Attached gingiva

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26
Q

A collar of thin gingiva that surrounds each tooth; it is not attached.

A

Free gingiva/Marginal gingiva

27
Q

This is part of the collar of free gingiva that extends between the teeth.

A

Interdental/Interproximal papilla

28
Q

This is a very thin ligament composed of many tissue fibers that attach the outer layer of the tooth root to the thin layer of dense alveolar bone surrounding each tooth.

A

Periodontal ligament

29
Q

This is a pyramidal elevation, or peak, located on the occlusal surfaces of molars and premolars, and on the incisal edges of canines.

A

Cusps

30
Q

This is a small elevation on some portion of the crown produced by an extra formation of enamel.

A

Tubercle

31
Q

This is the inclined surfaces or slopes that converge toward the cusp tip to form an angle.

A

Cusp slopes/Cusp arms

32
Q

This is located on the mesial and distal border of the lingual surface and converge toward the cingulum.

A

Marginal ridges (anterior)

33
Q

This is located on the mesial and distal borders of the occlusal surface.

A

Marginal ridges (posterior)

34
Q

These are located on each major cusp of posterior teeth. Each triangular ridge extends from a cusp tip toward the depression (sulcus) in the middle of the occlusal surface faciolingually.

A

Triangular ridge

35
Q

This is when a triangular ridge from a facial cusp joins with a triangular ridge from an adjacent lingual
cusp, the two ridges together form a longer ridge.

A

Transverse ridge

36
Q

This is found only on maxillary molars It crosses the occlusal surface obliquely and is made up of one
ridge on the mesiolingual cusp joining with the triangular ridge of the distobuccal cusp.

A

Oblique ridge

37
Q

This is a subtle ridge running cervicoocclusally in the middle third of the buccal surface of premolars.

A

Buccal cusp ridge

38
Q

This runs cervicoincisally and can be very prominent on maxillary canines.

A

Labial ridge

39
Q

This is the outline of the entire tooth crown from the occlusal view.

A

Crown outline

40
Q

This is the outline of the smaller occlusal surface that is bounded by adjoining mesial and distal cusp ridges and marginal ridges that surround it.

A

Occlusal table

41
Q

This is the enlargement or bulge on the cervical third of the lingual surface of the crown on anterior teeth.

A

Cingulum

42
Q

This is found on the facial surface of permanent molars (and all primary teeth), the subtle ridge running mesiodistally in the cervical one third of the facial surface of a crown. It is most pronounced on the outline of the mesiobuccal cusp of mandibular second molars.

A

Cervical ridge

43
Q

These are three small tubercles or scallops, each formed from one of the three facial developmental lobes on the incisal edges of newly erupted incisors.

A

Mamelons

44
Q

These are the numerous, minute horizontal ridges on the enamel of newly erupted permanent teeth.

A

Perikymata

45
Q

This is where the nerves and blood vessels enter into the tooth pulp.

A

Apical foramen

46
Q

This is neck of the tooth is the slightly constricted region of union of the crown and the root.

A

Cervix

47
Q

This is the trunk base is the part of the root of a multi-rooted molar or tworooted premolar next to the
cementoenamel junction that has not yet split

A

Root trunk

48
Q

This is the place on multirooted teeth where the root trunk divides into separate roots.

A

Furcation

49
Q

This is seen on two-rooted teeth.

A

Bifurcation

50
Q

This is seen on three-rooted teeth

A

Trifurcation

51
Q

This is the interradicular space is the region or space between two or more roots, apical to the place where the roots divide from the root trunk

A

Furcal region

52
Q

This is when the amount of curvature is greater on the mesial surface than on the distal surface of the same tooth

A

CEJ line

53
Q

These are found on molars and premolars
on the occlusal surfaces mesial or distal to
marginal ridges.

A

Triangular fossa

54
Q

These are the major, sharply defined
narrow, linear depressions formed during
tooth development and usually separating
the lobes or major portions of a tooth.

A

Developmental grooves

55
Q

Tooth with longest crown.

A

Mandibular canine

56
Q

Tooth with longest crown (according to woefel research)

A

Maxillary incisor

57
Q

Longest tooth overall

A

Maxillary canine

58
Q

Widest tooth mesiodistally

A

Mandibular first molar

59
Q

Widest tooth buccolingually

A

Maxillary first molar

60
Q

Narrowest tooth mesiodistally

A

Mandibular central incisor

61
Q

This refers to the amount of tooth that is not visible since it is covered with gingiva.

A

Clinical root

62
Q

This is the part of a tooth covered by cementum.

A

Anatomic root

63
Q

This is the potential space between the free gingiva and the tooth

A

Gingival sulcus

64
Q

This cusp is only found at the maxillary first molars; this is a small additional cusp at the mesiopalatal line angle of maxillary first molars.

A

Cusp of carabelli

ORAL ANATOMY (4 decks)

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