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Tooth Morphology > Tooth morphology > Flashcards

Tooth morphology Flashcards

1
Q

What is the occlusal shape of the maxillary central incisor?

A 
Large trapezoid
Crown large in proportion to the root
Triangular
Straight incisal edge
Straight medial surface
Taller than lateral
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2
Q

What are the roots shaped like in central maxillary?

A

One large, tapered root with triangular cross section

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3
Q

What is the occlusal shape of the mandibular central incisor?

A

Symmetrical narrow trapezoid
Smaller than lateral incisor
Small convex cingulum
Straight incisal edge

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4
Q

What are the roots shaped like in the mandibular central incisor?

A

Single, narrow, conical root which is flattened mesio-distally

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5
Q

What are differences between the central incisor and lateral incisor?

A

Root is fatter and shorter than lateral
Crown taller than lateral
Central has a larger cingulum

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6
Q

What are the differences between the maxillary and mandibular central incisors?

A

Root is thinner in mandible
Tooth is narrower of the mandible
Root of maxillary is rounded triangular and tapered, mandibular is conical and narrower
Cingulum is well defined in maxillary not mandibular

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7
Q

What is the occlusal shape of the maxillary lateral incisor?

A

Blade shaped
Crown is smaller and more rounded
Narrower mesio-distally
Shorter than central

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8
Q

What is the occlusal shape of the mandibular lateral incisor?

A

Narrow trapezoid
Incisal edge wider than central
Fan shaped
Crown is larger than mandibular central

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9
Q

What is the root outline of maxillary lateral incisor?

A

Single root, narrow, oval and tapered to a point, root is thinner than maxillary central

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10
Q

What is the root outline of mandibular lower incisor?

A

Single narrow conical root which curves distally, flattened mesio-distally

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11
Q

What are the differences between the central and lateral mandibular incisors?

A

Root slightly wider, longer and thicker than mandibular central incisors

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12
Q

What are the differences between maxillary and mandibular lateral incisors?

A

Maxillary have a more distinct lingual anatomy and more grooves, maxillary have a wider mesio-distal diameter than labial lingual whilst mandibular have a wider labial lingual than mesio-distal

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13
Q

What is the shape of the maxillary canine?

A

Large irregular pentagon
Wedge shaped mesial distally
Greater labio palatal bulk than any other tooth

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14
Q

Which tooth has the greatest labio palatal bulk than any other tooth?

A

Maxillary canine

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15
Q

What is the root of the maxillary canine?

A

Single large conical root with rounded triangular cross section.
Longest in any tooth, root may bend distally

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16
Q

Which tooth has the longest conical root?

A

Maxillary canine

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17
Q

What is the shape of the mandibular canine?

A

Long pentagon shape, crown is generally smaller and narrower mesio-distally

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18
Q

What is the cusp form of the mandibular canine?

A

Incisal ridge divided into mesial and distal slopes . Shorter more horizontal medial slope meets the longer, steeper distal ridge to form an obtuse angle at the cusp tip. Tip more lingually placed than maxillary canine.
Distal convex
Mesial surface straight line
Labial surface concave

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19
Q

What is the root form of the mandibular canine?

A

Single long root with oval cross section, flattened mesiodistally

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20
Q

What is the difference between mandibular and maxillary canine?

A
  • Larger crown in maxillary
  • Longer root in maxillary
  • Bulky cingulum maxillary
  • Less developed and lower cingulum in mandibular
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21
Q

What is the outline form of the maxillary first premolar?

A

Angular occlusal outline, with broad mesio-distal shoulder to the large buccal cusp compared to small palatal cusp, crown is wider on buccal side

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22
Q

What is the cusp form of the maxillary first premolar?

A

Two cusps, large buccal cusp and smaller palatal cusp separated by mesio-distal fissure. Mesial cusp slope longer than distal cusp slope

23
Q

What are the features of the mesial surface of the maxillary first premolar?

A

Developmental canine groove extending across mesial marginal ridge to join canine fossa

24
Q

What is the root form of the maxillary first premolar?

A

Two roots, buccal and palatal, pronounced mesial groove, root curves distally

25
Q

What is the outline form of the mandibular first premolar?

A

Diamond shaped occlusal outline, mesio lingual portion of crown pushed in. Smallest crown of all premolars, outline not symmetrical

26
Q

What is the cusp form of the mandibular first premolar?

A

Dominant pointed buccal cusp, very small lingual cusp, poorly developed mesiodistal fissure into smaller mesial and larger distal fossa. Mesio-lingual developmental groove separates mesial marginal ridge from lingual cusp.

27
Q

What is the root form of the mandibular first premolar?

A

One single tapered oval shaped root, curves distally

28
Q

Differences between mandibular and maxillary first premolars?

A

Mandibular has one root, maxillary has two, maxillary crown larger, maxillary has mesiodistal fissure, mesiodistal fissure in mandibular poorly developed. Mesio-lingual cusp pushed in in mandibular

29
Q

What is the outline form of maxillary second premolar?

A 
Oval occlusal symmetrical outline, compressed mesiodistally.
Mesial distal surfaces nearly parallel
Less angular than first premolar
Two cusps, similar sized
Slightly shorter buccal cusps than first
30
Q

Cusp outline of maxillary second premolar?

A

Two cusps, more equal in size than first

Short central fissure

31
Q

What is the root form of maxillary second premolar?

A

Single conical root flattened mesiodistally

32
Q

Comparisons between first and second maxillary premolars?

A

Crown is smaller and more symmetrical in second
Root is longer in second
Mesial and distal more parallel in second
Occlusal fissure smaller in second
Cusps smaller and more equal in second

33
Q

What are the two types of cusp outlines you can find in mandibular second premolar?

A

Two cusp - round

Three cusp - square

34
Q

Where is the tip located in the buccal cusp of mandibular second premolar?

A

Buccal side

35
Q

What is the cusp form of the mandibular second premolar?

A

Three cusps more equal in size, two lingual and single buccal cusp (taller and wider mesiolingual than distolingual)
Two cusp has central curving occlusal fissure around buccal cusp joining mesial and distal fossa, distal fossa being larger than mesial

36
Q

What is the root form of mandibular second premolars?

A

SIngle conical root with rounded cross section, flattened slightly mesio-distally, curves distally, root longer in second

37
Q

What is the outline form of the maxillary first molars?

A

Rhomboid outline
Largest occlusal outline of all maxillary teeth
Longest diameter of crown runs mesio-buccal to disto-palatal
Narrower bucco-palatally on distal surface
Buccal convex
Less flattened palatal
Distal convex
Mesial either flat or concave

38
Q

What is the cusp form of maxillary first molars?

A

Four major cusps - two buccal two palatal
H shaped occlusal fissure
MP cusp largest DP smallest
Buccal cusp tips more prominent than palatal
Occlusal surface divided by oblique ridge
Cusp of caribelli

39
Q

What is the root form of maxillary first molars?

A

Three separated roots, two buccal one palatal, palatal longest and circular. Buccal flattened mesio-distally, mesiobuccal root longer than distobuccal

40
Q

What is the outline form of mandibular first molars?

A 
Pentagon outline
5 cusped
Largest occlusal outline of man teeth
Crown longer MD than BL
Lingual surface flat compared to convex buccal
41
Q

What is the cusp outline of mandibular first molars?

A 
Two major - MB, DB equal
Separated by mesiobuccal groove
Lingual - ML, DL equal
MB wider than lingual cusps
D smallest cusp
Lingual cusps taller and more pointed
Y shaped fissure - buccal and lingual fissures meeting at central fossa
Distal convex
42
Q

What is the root form of the mandibular first molars?

A

Two roots - one mesial, flattened curves distally one distal rounded and slightly shorter

43
Q

What is the outline form of the maxillary second molar?

A

4 cusps or 3 cusps rhomboid or heart shaped

Crown height shorter buccal view

44
Q

What is the cusp form of maxillary second molar?

A

Disto-palatal cusp is smaller and may be absent, disto buccal cusp shorter
Mesial cusps same size as first molar

45
Q

What is the root form of maxillary second molar?

A

Three roots, two buccal one palatal
Less divergent than those of first (Less spread out)
MB root curves distally
DB root straighter

46
Q

What is the outline form of mandibular second molar?

A

Rectangular
Four cusps
Crown not as long mesio distally

47
Q

What is the cusp outline of mandibular second molar?

A

Four cusps MB, ML, DB, DL
Cross shaped fissure
Buccal groove
Lingual cusps have more pointed tips, mesial cusps larger than buccal cusps

48
Q

What is the root form of mandibular second molar?

A

Two roots, mesial and distal, flattened mesio-distally and smaller and less divergent than first
Mesial root larger

49
Q

Maxillary and mandibular crown completion dates

A 
4-5
4-5
6-7
5-6
6-7
2.5-3
7-8
12-16
50
Q

Maxillary eruption dates

A 
7-8
8-9
11-12
10-11
10-12
6-7
12-13
17-21
51
Q

Maxillary root completion dates

A 
10
11
13-15
12-13
12-14
9-10
14-16
18-25
52
Q

Mandibular crown completion dates

A 
4-5
4-5
6-7
5-6
6-7
2.5-3
7-8
12-16
53
Q

Mandibular eruption dates

A 
6-7
7-8
9-10
11-12
10-12
6-7
12-13
17-21
54
Q

Mandibular root completion dates

A 
9
10
12-14
12-13
13-14
9-10
14-15
18-25

Tooth Morphology (1 decks)

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