1. Primary Dentition Flashcards
(74 cards)
1
Q
What is the calcification times for all deciduous teeth
A
4th fetal month
2
Q
Eruption time: Primary canine
A
1.5 yr (16-20 mo)
3
Q
Eruption time: Primary 2nd molar
A
2yrs (20-30 mo)
4
Q
Eruption time: Primary Maxillary centrals
A
6-10 mo (after mandibulars)
5
Q
Eruption time: Primary Mandibular laterals
A
7-10 mo
6
Q
Eruption time: Primary Maxillary lateral
A
8-12 mo
7
Q
Eruption time: PrimaryMandibular central
A
5-8 mo
8
Q
Calcification time for the permanent maxillary lateral
A
10-12 mo.
9
Q
Eruption time: Permanent 1st 2nd and 3rd molars
A
1st= 5.5-7 yrs 2nd= 12-14 yrs 3rd= 17-30 yrs
10
Q
Calcification time: 1st molars
A
Birth
11
Q
Calcification time 2nd molars
A
30-36 mo (3 years)
12
Q
Eruption time: Maxillary central
A
7-8 yr
13
Q
Eruption time: Mandibular canine
A
9-11 yr
14
Q
Eruption time: Mandibular 1st PM
A
10-12 yr
15
Q
Calcification time: Mandibular 3rd molar
A
7-9 yr
16
Q
Eruption time: Mandibular central
A
6-7 yr
17
Q
Eruption time: Maxillary canine
A
11-12 yr
18
Q
Calcification time central incisors
A
3-4 mo
19
Q
Eruption time: Mandibular lateral
A
7-8 yr
20
Q
Eruption time: Maxillary 2nd Premolar
A
10-12 yo
21
Q
Calcification time: Mandibular incisors
A
3-4 mo
22
Q
Eruption time: Mandibular 2nd PM
A
11-13 y.o
23
Q
Calcification time: Canines
A
4-5 mo
24
Q
Calcification time: 2nd PM
A
24-30 mo
25
Eruption time: Maxillary 1st PM
10-11 y.o
26
Calcification time: 1st PMs
18-24 mo
27
Eruption time: Maxillary lateral
8-9 y.o
28
Calcification time: Mandibular lateral
3-4 mo
29
Calcification time: Maxillary 3rd molar
8-10 y.o
30
How many teeth in the primary dentition are there
20
31
T/F . A neonatal tooth that erupts within the first week after birth is not likely the primary tooth
f- it is
32
What is the primate space
Maxillary arch= space between the lateral and the canine (mesial to canine)
Mandibular arch= space between the canine and 1st molar (distal to canine)
33
Describe flush terminal plane and what occlusal class may arise in the permanent dentition
Normal relationship of the primary molar teeth (2nd molars on top and bottom are aligned)
Occlusal scheme- Edge to edge or Class I
34
Describe distal step and what occlusal class may arise
Equivalent to a Class II (maxillary 2nd molar is more anterior relative to the mandibular)
Occlusal scheme= Class II or edge to edge
35
Describe mesial step and what occlusal scheme may it give rise to in the permanent dentition
Mesial step= class I occlusion
Occlusal scheme= Class I or Class III
36
Why is a equivalent Class III occlusion rarely seen in primary dentition
Mandibular growth lags behind the maxilla
37
What is leeway space
Difference between the MD width of the primary canine, 1st, 2nd primary moalrs and the permenant canine, 1st and 2nd Premolars
38
The position of the first permanent molars is determined by
primary molar position
39
The relationship of the molars (Angles classification of occlusion) is determined by
mandibular growth
| leeway space
40
T/F Eruption cyst rarely requires tx
t- tooth should break through the tissue
41
T/F Eruption cysts are only seen in the primary dentition
f primary and permanent dentition
42
Eruption cyspts are most commonly seen where
molar region
43
Compare and contracts fusion and gemination
Fusion
- Will be short one tooth
- Union of two primary/permanent teeth
- Different from concressence because it also involves dentin (not just cementum)
- Separate pulp chambers and pulp canals
Gemination
- Normal number of teeth
- Attempted division of a single tooth germ by invagination
- Single pulp chamber
* *Both demonstrate
- familial tendency
- more common in primary than permanent dentition- but can occur in both
- Both will likely be missing the permanent successor
44
What phase of growth does gemination occur in
proliferation stage
45
What is ankylosis
Cementum fusion to surrounding bone
| -PDL is replaced with osseous tissue rendering the totoh immobile to eruptive change
46
The most common ankylosed teeth in the primary dentition are
- Mandibular primary 1st molar
- Mandibular primary 2nd molar
- Maxillary primary 1st molar
- Maxillary primary 2nd molar
47
T/F Ankylosis can occur in primary and permanent dentition
t- more common in primary teeth
48
Incidence of alkylosed teeth in primary dentition is
7-14%
49
_ % of patients with one ankylosed tooth have more than one
50%
50
In the permenant dentition ankylosis occurs most frequently after
Luxation injuries
51
Ankylosis in the anterior teeth as a result of trauma is referred to as
replacement resorption
52
T/F Ankylosed teeth exfoliate normally
t
53
Ankylosed teeth (should/shouldn't) be routinely removed? Exceptions?
Shouldn't --- exceptions are Large marginal ridge discrepancy
54
What are the largest etiologic correlation to patterns of hypodontia (missing teeth)
family heredity
55
When the primary tooth is absence it is (more/less) likely that the permanent tooth will also be absent
mroe
56
What are the top 4 most commonly congenitally missing teeth
- 3rd molars (10-25%)
- Mandibular 2nd premolars (3.4%)
- Maxillary Lateral incisors (2.2%)
- Maxillary 2nd Premolar (0.85%)
57
What are the calcification times for the four most commonly congenitally missing teeth
- 3rd molars (Mandibular= 8-10 years and maxillary= 7-9 years)
- Mandibular 2nd premolars (24-30 mo.)
- Maxillary Lateral incisors (10-12 mo)
- Maxillary 2nd Premolar (24-30 mo.)
58
What are the manifestations of ectodermal dysplasia
- No sweating
- Sparse hair
- Thick nails
- Missing and abnormally sharped teeth
59
What is the inheritance pattern of ectodermal dysplasia
- X-linked recessive
- Autosomal dominant
- Autosomal recessive
60
Supernumerary teeth can be associated with
- Delayed eruption of permanent teeth
- Ovder-retention of primary teeth
- Deflection of roots with unusualy inclinations
- Displacement of teeth
- Diastemas
- Abnormal root resorption
- Formation of follicular or dentigerous cysts
61
Supernumerary teeth are more frequently found in the (maxilla/mandible)
maxilla
62
Is there a familial pattern with supernumerary teeth
yes
63
It is (more/less) common to see supernumerary teeth in the primary dentition
less
64
What is the most common supernumerary tooth
mesiodens
65
90 % mesiodens are _ positioned
palatally
66
_ % of mesiodens don't erupt
75%
67
Mesiodens teeth should be extracted when and what is the exception to this rule?
when 2/3-3/4 the root has formed (exception is if it is preventing the eruption of the permanent successor)
68
What is a distodens
supernumerary tooth distal to molars
69
If you have a patient with lingually erupted permanent mandibular incisors and the primary teeth did not exfoliate what should you do
- If the patient is less than 8.2 years of age wait it out (see if the tongue and alveolar growth will push the permenant teeth forward and resorb the deciduous teeth)
- Older than 8.2 y.o extract the corresponding baby teeth
70
_% of ectopic molar erupts sel-correct
66% (22% in CLP)
71
T/F The teeth in riga-fede disease should be extracted because it is causing a traumatic granulomatous ulcer on the tongue
F- these are the primary teeth smooth then with sof-lex discs
72
Treatment options for Riga-Fede disease
- Smooth teeth
- Add resin
- Modify feeding position
73
Extraction of Riga Fede teeth indicated if
- Supernumerary
- Aspiration risk (mobile)
- Feeding issues
74
If a baby is under 10 days old and you need to do an extraction what should you do before the surgery and why
Give vitamin K (involved in prothrombin synthesis)- don't have the gut flora to produce their own VitK
