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D2: 622 Pediatric Dentistry > 05 Development of Dentition > Flashcards

05 Development of Dentition Flashcards

(94 cards)

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1
Q

When does the calcification of the primary teeth begin?

A

3.5-4.5 months after conception

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2
Q

The first teeth to erupt are the mandibular centrals, what age?

A

6-7 months

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3
Q

What tooth is the last to erupt? What month does this happen?

A

Maxillary 2nd Molar (AJ)

26 months

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4
Q

Which dentition shows less variability

A

Primary

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5
Q

The primary occlusion changes in order to adapt to these two things

A

Skeletal growth

Occlusal wear

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6
Q

At what stages of dental calcification and development are girls more advanced than boys?

A

All stages

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7
Q

When do teeth start to move occlusally

A

Not until crown formation is complete

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8
Q

What physical characteristic of teeth is determined genetically

A

Tooth size

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9
Q

There are relationships between these three genetically related conditions

A

Dental agenesis

Delayed development

Diminished size of teeth

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10
Q

Which condition is more likely:

Congenitally missing teeth or Supernumerary teeth?

A

Congenitally missing

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11
Q

Are congenitally missing teeth more likely in boys or girls

A

boys

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12
Q

Are changes in the width of the dental arch timed more closely to dental development or skeletal growth?

A

Dental development

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13
Q

When does dental arch circumference decrease?

A

During the late transitional and early permanent dentition

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14
Q

What surfaces are determinant factors in the initial permanent molar occlusion?

A

Distal of primary 2nd molars

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15
Q

Which teeth show the greatest variability in development

A

3rd moalrs

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16
Q

What is the order of calcification of primary teeth?

A

A, B, C, D, E

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17
Q

What is ABCDE

A 
A = Centrals
B = Laterals
C = Canines
D = First Molars
E = 2nd Molars
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18
Q

In what order do the cusps of posterior teeth calcify?

A

MB
ML
DB
DL

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19
Q

How many calcification centers are there in anterior teeth

A

one

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20
Q

Which tooth erupts at 6 months

A

Mn Centrals

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21
Q

Eruption = 7 Months

A

Mn Lats

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22
Q

Eruption = 7.5 Months

A

Mx Centrals

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23
Q

Eruption = 9 Months

A

Mx Lats

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24
Q

Eruption = 12 Months

A

Mn 1st Molar

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25
Eruption = 14 Months
Mx 1st Molar
26
Eruption = 16 Months
Mn Canine
27
Eruption = 18 Months
Mx Canine
28
Eruption = 20 Months
Mn 2nd Molar
29
Eruption = 24 Months
Mx 2nd Molar
30
Initiation times for permanent Centrals, Lats, Canines, 1st PMs
5 months IU
31
Initiation times for 2nd Premolars
10 months PP
32
Initiation times for 1st Molars
20 weeks IU
33
Initiation times for 2nd molars
12 months PP
34
Initiation times for 3rd molars
5 years PP
35
What is the length of time for root completion for primary teeth?
18 months Post eruption
36
What is the length of time for root completion for permanent teeth
3 years post eruption
37
What is the range of eruption times for primary teeth
6 months to 24-36 months
38
Only 1% of kids don't have their first tooth by this age
12 months
39
Only 1% of kids have a tooth before this age
4 months
40
By the age of 12 months, the average kid has this many teeth
6-8
41
Rarely do kids have less that this many teeth at 12 months
2
42
Rarely do kids have more than this many teeth at 12 months
10
43
90% of all kids have all of their primary teeth by this age
3 years
44
why is the sequence of eruption more important that the time of eruption
it determines the position of the teeth in the arch
45
What conditions that have anecdotally been related to teething have been proven to be unrelated to teething?
Respiratory infections Fever convulsions Bronchitis Exczema
46
60 % of infants exhibit these symptoms before and after eruption
Rhinorrhea Irritability Diarrhea
47
Macknin et al found the following symptoms significantly associated with teething
``` Increased biting Drooling Gum rubbing Sucking irratability Wakefulness Ear rubbing Facial rash Decreased appetite for solid foods Mild Fever (<101) ```
48
We should know the liquid that is contained in these common child products
Teething rings
49
What treatment is needed for an eruption hematoma
None!
50
What are neonatal teeth
Teeth that erupt within the first 30 days of life
51
What are premature teeth
Teeth erupted earlier than 3 months of age
52
What are natal teeth
Teeth that have erupted before birth
53
What is more common, natal teeth or neonatal teeth
Natal 3:1
54
How common/rare are natal teeth
1:2000
55
What percent of natal teeth are true primary teeth
90%
56
What condition is associated with Natal/Neonatal Teeth
Riga-Fede Disease
57
What is Riga-Fede Disease
Tongue trauma from feeding
58
What two syndromes are associated with natal and neonatal teeth
Chondroectodermal Dysplasia Cleft lip and palate
59
What is another name for Chondroectodermal Dysplasia
Ellis-van Creveld
60
What is Chondroectodermal Dysplasia
Inherited bone growth disorder that can cause dwarfism and tooth deformity
61
What are three structures in newborns that can be confused for neonatal teeth
Dental lamina cysts Bohn's nodules Epstein's Pearls
62
Is Baume Type I spaced or not spaced
Spaced
63
Where are the maxillary primate spaces
Mesial of canine
64
Where are the mandibular primate spaces
Distal to canines
65
Why are the primate spaces important
Canine and bicuspid eruption
66
Does the total interdental spacing between primary teeth increase or decrease with age?
Decrease
67
What is the most common terminal plane relationship
Mesial (60%) Class I
68
What does the Primary Molar Terminal Plane help determine
Transitional occlusal pattern of the permanent molars
69
How is the orientation of primary incisors different from permanent incisors
Primary = Upright with little overbite and overjet Perm = Labial angulation and greater overbite and overjet
70
Why does the intercanine width of the mandibular arch increase only slightly with the eruption of the permanent incisors
Due to the divergent nature of the distal movement of the primary canine into the primate spaces
71
What is the leeway space of Nance
the combined mesio-distal widths of deciduous canines and molars differ from those of permanent canines and premolars by 0.9 mm in Mx and 1.7 mm in Mn
72
What is the early mesial shift?
The eruptive force of the permanent molar causes the generalized spacing to close allowing the permanent molar to shift into a class I occlusion
73
When does the late mesial shift happen
when no primate spaces exist the shift occurs when the second primary molar exfoliates in the mandible before the maxilla
74
What should we know about Anodontia
That if you are missing the primary tooth completely, you will never develop the permanent tooth
75
Histopathology Initiation
Problems of tooth #
76
Histopath Proliferation
Problems of tooth #, size, proportion, twinning
77
Histopath Histodifferentiation
Problems of enamel and dentin
78
Histopath Morphodifferentiation
Problems of size, shape
79
Histopath Appostition
Enamel hypoplasia, dentin dysplasia, hypercementosis, enamel pearls
80
Histopath Mineralization and Maturation
Flourosis, localized hypomineralizaton, interglobular dentin
81
Anomolies of Initiation and Proliferation
Hyperdontia Hypodontia Anodontia
82
What syndromes are associated with Hyperdontia
``` Apert Cleidocranial dysplasia Gardner's Crouzon's Down's ```
83
What syndromes are associated with Hypodontia and Anodontia
ED Crouzon's Achondroplasia Ellis Van Creveld
84
Which teeth are the most frequently congenitally absent
3rd Molars Mn 2nd Premolars Mx Lats Mx 2nd premolars
85
Anomalies of Proliferation and Morphodifferentiation
Microdontia | Macrodontia
86
Most frequent Microdontia teeth
Laterals 2nd PM 3rd Molars
87
Conditions with Microdontia
``` ED Ellis Van Creveld Hemifacial microsomia Down Crouzon ```
88
Conditions with Macrodontia
Hemifacial hypertrophy Crouzon Otodental Syndrom
89
Anomalies of Proliferation and Morphodifferentiation 2
Gemination Twinning Fusion Concrescence
90
What is gemination
Single pulp, split crown, more common in primary
91
What is Twinning
Single bud w/supernumerary image 2 separate crowns
92
What is fusion
more common in primary teeth 2 separate pulp chambers
93
What is concrescence
Fusion that occurs after root formation is completed
94
Anomalies in Morphodifferentiation
Dens Invaginatus Den Evaginatus (Talon Cusp) Taurodontism Dilaceration

D2: 622 Pediatric Dentistry (9 decks)

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