Tooth Anatomy And Eruption Sequence/dates Of Primary And Permanent Dentition

Front 1

There are two different sets of teeth during our lifetime, what are they?

Back 1

1. Primary Dentition (Deciduous or baby teeth)

2. Permanent Dentition

Front 2

When does the deciduous teeth begin to form?

Back 2

Before Birth

Front 3

When does the deciduous teeth begin to erupt into the mouth?

Back 3

6 months or so of age

Front 4

The process of eruption is usually complete at about what age?

Back 4

2 and a half years of age

Front 5

At what age does the deciduous dentition start to exfoliate and gradually replaced by permanent dentition?

Back 5

3 to 4 years old

Front 6

What is the other name for top jaw?

Back 6

Maxilla

Front 7

What is the other name for lower jaw?

Back 7

Mandible

Front 8

Whatcan happen when one or more teeth are removed?

Back 8

Thearch form may collapse, with significant consequences for the patient's abilityto bite and chew

Front 9

Howmany teeth are there in a deciduous arch?

Back 9

20 teeth

Front 10

What are the other names of Cuspid?

Back 10

Canine or eye tooth

Front 11

Howmany teeth are there in a permanent arch?

Back 11

32 teeth

Front 12

Does primary dentition have the same function as the permanent dentition?

Back 12

Yes. It helps with Chewing,speech, aesthetics of facial contours.

Inaddition:

- actas natural space maintainers and guide

- assistsin normal growth and development of jaws and face

Front 13

Whatare the first teeth to erupt in a baby’s mouth?

Back 13

Mandibular Central Incisors (5mos-7mos)

Front 14

Do all children get their first teeth at the same age?

Back 14

Eruption times can vary from child to child

Front 15

when is the Initial calcification of primary teethoccurs?

Back 15

between 3-6 months in utero

Front 16

Back 16

First and Second Incisors completion of roots = 1.5 to 2 years

First Molar completion of roots = 2 to 2.5 years

Canine completion of roots = 2.5 to 3 years

Second Molar completion of roots = 3 years

Front 17

Describe the crown of the primary teeth

Back 17

1. Shorter

2. Appearconstricted in the cervical portion

3. Thinnerenamel and dentin layers

4. Broadand flat contacts

5. Coloris usually lighter

6. Prominentmesio-buccalcervical bulge seen in primary molars

7. Incisorshave no easily discernable developmental grooves or mammelons

Front 18

Describe Primary Maxillary Central Incisor

Back 18

1. Mesiodistalwidth of crown almost = height

2. Prominentcingulum

3. Incisaledge straight

Front 19

Describe Primary Maxillary Lateral Incisor

Back 19

1. Similarform to central incisor

2. Smallerand Disto-Incisal angle rounded

Front 20

Describe Primary Maxillary Canine

Back 20

1. Crownconstricted at cervical region

2. Welldeveloped, sharp cusp

3. Rootis long, more than 2X crown

Front 21

Describe Primary Mandibular Canine

Back 21

1. Similarform to maxillary

2. Crownshorter and narrower labiolingually

Front 22

Describe Primary Maxillary First Molar

Back 22

1. Uniqueappearance

2. Threecusps-MB, DB and Lingual

3. ProminentMB cervical bulge

**Resemble a permanent premolar

**Groove pattern is "H" shape

Front 23

Describe Mandibular First Molar

Back 23

1. Alsounique in appearance

2. Fourcusps-MB, DB, ML and DL

3. ProminentMB cervical bulge

4. Transverseridge

**Resembles no other tooth in either primary and permanent set

**Mesial root wider+longer than Distal (opposite to permanent mandibular molar in length)

Front 24

Describe Maxillary 2nd Molar

Back 24

1. Resemblespermanent maxillary first molar but smaller

Front 25

Describe Mandibular 2nd Molar

Back 25

1. Resemblespermanent mandibular first molar but smaller

Front 26

Describe the pulp of Primary teeth

Back 26

1. Relativelylarger

2.Pulphorns are closer to the outer surface

3. Greatvariation in size and location

4. Mesial pulphorn is higher

5. Pulpchamber shallow

6. Formof the pulp follows the external anatomy

7. Usuallya pulp horn under each cusp

Front 27

Describe roots of Primary teeth

Back 27

1. Rootsof anterior teeth are narrower bucco-ligually

2. Posteriorteeth have more slender roots

3. Molarroots flare more as they approach the apex to accommodate tooth buds

4. APICAL FORAMINA may be larger and ACCESSORY CANALS often larger and more numerous

Front 28

What are the implications ofPrimary tooth morphology?

Back 28

Theprogress of caries is much faster in the primary dentition, so incipientlesions should be restored sooner than later!

-Thinenamel

-Thindentine

-Mesialpulp horn high

Front 29

SUMMARY OF PRIMARY TEETH

Back 29

1.Thinnerenamel

2.Pulphorns closer to the outer surface

3.Mesialpulp horn much higher

4.Relativelylarger pulps

5.Cervicalis sharply demarcated

6.Rootsflare as they approach the apex

7.Moretortuous and irregular pulp canals

Front 30

Whatare the similarities and differences between permanent and deciduous teeth?

Back 30

?

Front 31

Lookat picture and model of primary and permanent teeth and note differences

Back 31

?

Front 32

Whatis the eruption pattern for the primary teeth?

Back 32

?

Front 33

Lookat the chart of eruption dates and note down approximate eruption ages for thefollowing primary teeth: upper 2’s, lower 3’s, upper 4’s, 5’s

Back 33

?

Front 34

Age when the permanent dentition begin to erupt

Back 34

6 years old

Front 35

Age when the deciduous dentition is entirely replaced by permanent dentition

Back 35

12 or 13 years old

Front 36

Age when the wisdom tooth comes through

Back 36

between 17 to 25 years old

Front 37

How many quadrants needed to make the entire dentition?

Back 37

four

Front 38

How many teeth per quadrant of a permanent dentition?

Back 38

8 teeth per quadrant

Front 39

What is the dental formula for Primary Dentition and Permanent Dentition?

Back 39

Primary Dentition = 2 1 2 (incisors, canine,molars)

Permanent Dentition 2 1 2 3 (incisors canine premolar molar)

Front 40

Which teeth are considered anterior teeth?

Back 40

Central incisors, lateral incisors, canines

Front 41

Which teeth are posterior teeth?

Back 41

premolars (1st and 2nd) and molars (1st 2nd and 3rd)

Front 42

Mandibular teeth precede their maxillary counterparts. The ONLYexception is the second premolars. True or False?

Back 42

True. Maxillary second premolar erupts first before Mandibular second premolar

Front 43

Which are the first permanent teeth to erupt?Alternatively?

Back 43

First molars or Mandibular central incisors by the age of 6

Front 44

What are the last primary teeth to be replaced?

Back 44

Second molars (mandibular and maxillary) erupt after the upper canines

Front 45

What are the very last teeth to erupt?

Back 45

3rd molar (wisdom teeth)

Front 46

What are the four types of teeth?

Back 46

The cutting Incisors

The pointed Canines (cuspids)

The two pointed Premolars (bicuspids)

Many cusped or many pointed Molars

Front 47

What are the features of Incisors?

Back 47

It has one root

It has a shovel-like crowns

Have a biting or an incised edge

Have cingulum and marginal ridges

Front 48

How does the shape of Incisors helped with its function?

Back 48

The incisal edges of the upper teeth do more of the incision, and the palatal surfaces less, so the bitefrom the upper teeth becomes deeper.

**to cut or incise food with their thin edges.

Front 49

The distance that provides the space to permit the development of the shearing force of the incisors

Back 49

Overjet

Front 50

The distance when the scissor bladescome to lie over each other, so the teeth "over close" in the incisorarea

Back 50

Overbite

Front 51

What are the features of Canine?

Back 51

Have one root (longest and most stable teeth in the dental arch)

Have a pointedcusp instead of a biting edge

Roughlydiamond-shaped from the front viewCingulum and marginalridges

Front 52

What is the functions of the canines?

Back 52

used for holding, grasping, and tearing food. Referred to as the cornerstone of the mouth.

Front 53

Why can't humans have long canines?

Back 53

Human mastication demands that webe able to move our jaws from side to side to be able to successfully chew ourfood.

Front 54

How would itaffect the mastication if the humancanines were as large as animals’?

Back 54

Chewing our food would be difficult if our canines are extended beyond our dental arch. You will note that dogs, unlike man, do not chew their food; the use towhich their dentition is put is different from ours.

Front 55

What are the features of Premolars?

Back 55

Have a truebiting (occlusal) surface

Two cusps – buccal and lingual

The buccal cusp islarger than the lingual cusp

It has fissures

Mesial and distalmarginal ridges

First upperpremolars often have 2 roots, lower counterparts – 1 root

Front 56

What is the functions of Premolars?

Back 56

holding food, like canines because they have cusps; also to crush food.

Front 57

What are the features of Molars?

Back 57

The largest ofall the human teeth

The crowns arebulky and wide with 4 or 5 cusps

The uppermolars have 3 roots, lower have 2

Front 58

How does the design of Molars help with function?

Back 58

**Grinding food

Front 59

Name this tooth

Back 59

Mandibular Right First Molar

Front 60

Name this tooth

Back 60

Maxillary Right First Molar

Front 61

What is the term used for teeth that has no deciduous predecessors?

Back 61

Accedaneous (Only Permanent molars. Great example is the first molar teeth)

Front 62

What is Succedaneous?

Back 62

When the permanent teeth replace the primary teeth

Front 63

What is Occlusal plane?

Back 63

a plane passing through the occlusal or biting surfaces of the teeth

Front 64

What is Midline?

Back 64

line between your two upper front teeth and your two lower front teeth

Front 65

What is FDI notation?

Back 65

widely used by dentists internationally to associate information to a specific tooth

Front 66

What is Embrasure?

Back 66

embrasures are V-shaped valleys between adjacent teeth. They provide a spill way for food to escape during chewing which essentially aids in the self-cleansing process

Front 67

What is Lobe?

Back 67

A lobe is one of the primary anatomical divisions of a crown; all teeth develop from either four or five lobes (for example, a central incisor forms from four lobes while first molars develop from five lobes.)

Front 68

What is Mammelons?

Back 68

are small, rounded projections of enamel from the incisal edges of newly erupted anterior teeth?

Front 69

What are Developmental grooves?

Back 69

is a shallow groove or line between the primary parts of the crown or root

Front 70

What is fissure?

Back 70

A developmental groove that has an imperfect union where the lobes come together

Front 71

What is Cingulum?

Back 71

A cingulum is found on the lingual aspect of an anterior tooth. It is a convex mount of enamel localized to the cervical one-third of the crown.

Front 72

Marginal ridge – what is the clinical significance ofthis structure?

Back 72

marginal ridge is a linear, rounded border of enamel that forms the mesial and distal margins of anterior teeth as viewed from the lingual, and the mesial and distal borders of occlusal surfaces on posterior teeth.

Front 73

What is Oblique ridge?

Back 73

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

*Maxillary first molar

Front 74

The surfacesof teeth which:

1.Face thetongue are called?

2.Face the cheekare called?

3.Face themidline are called?

4.Face adjacentteeth are called?

5.Face the lipsare called?

6.Are furthestaway from the midline are called?

Back 74

1.Lingual Surface

2. Buccal Surface

3. Mesial Surface

4. Palatal Surface

5. Labial Surface

6. Distal Surface

Front 75

The presence of the ___________, and by the__________________ help anchor the upper anterior teeth to thestable canine teeth.

Back 75

Upper Lip and Periodontal Ligaments

Front 76

What are the directions of these stress forces that aretransmitted to the teeth?

Back 76

?

Front 77

How are the ligaments (which attach theteeth to the sockets)modified to be able to absorb andtransmitting these stresses to the bones?

Back 77

?

Front 78

How manypermanent teeth are there?

Back 78

32 teeth

Front 79

What is theeruption pattern for the permanent teeth?

Back 79

1. First teeth to erupt is the mandibular central incisors or mandibular first molar by the age of 6.

2. Followed by the maxillary central incisors, mandibular lateral incisors, maxillary lateral incisors.

3. Mandibular canine replace the primary predecessors.

4.Followed by the Mandibular 1st premolar, Maxillary 1st premolar, Maxillary 2nd molar then Mandibular 2nd molar.

5.The last primary to be replaced is the second (maxillary and mandibular) molars after the upper canines erupt.

Front 80

Select a permanent tooth and describes its main morphological characteristics, eruptiontimes and function

Back 80

?