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1

Tooth eruption is influenced by what 3 hormones?

Growth hormone

Parathyroid hormone

Thyroid hormone

2

Each tooth starts to move toward occlusion at approximately the time of ____. It takes ___ years for permanent teeth to reach full occlusion after crown completion

Crown completion

5 years

3

True or false... tooth emergence is more closely associated with the stage of root formation than with the skeletal age of the child

True

4

By the time of clinical emergence of the tooth, approximately ____ of root formation has occurred with teeth reaching occlusion before the ___ is complete

3/4th

Root development

5

The earlier primary teeth erupt, the (sooner/later) they will lose them and receive permanent teeth. The (slower/faster) they get the primary teeth they are a lot slower getting permanent teeth.

Sooner

Slower

6

If extraction of the primary molars occurs after 5 years of age, there is a (decrease/increase) in the delay of premolars eruption.

Decrease.


Eruption of the premolars teeth is delayed in children who lose primary molars at 4 or 5 years of age or before.

7

What are odontomas?

Composed of enamel, dentin, and pulp tissue.

Because of their slow growth and well differentiation, they are generally considered to represent harmartomas rather than true neoplasms

8

True or false.. it is contraindicated for early removal of offending primary incisor even in spaced dentition when there is a lingual secondary incisors

False

9

What are the symptoms of teething?

Increased salivation

Restlessness

Finger sucking

Gum rubbing

Perhaps loss of appetite

10

True or false... teething may cause fever, convulsions, bronchitis, diarrhea, infection

False

11

What teeth are most likely to be ankylosed?

Mandibular primary molars

12

What is the first thing you should do to a permanent incompletely erupted molar?

Removal of soft tissue and bond covering the occlusal aspect of the crown, then the area should be packed with surgical cement to provide a pathway for the developing permanent tooth

Next, you should do a luxation technique by rocking it the tooth and repeated in 6 months. A delay in treatment may result in a permanently ankylosed molar.

13

Down syndrome is one of the congenital anomalies in which ___ frequently occurs

Delayed eruption of teeth

14

Down syndrome tend to have lower __ rates but higher __ rates

Decay

Gingivitis

15

Why would you use a passive lingual arch appliance?

If the child lost their primary canines too early. . An abnormal lip musculature or oral habit can cause greater force on the mandibular incisors that can be compensated for by the tongue

16

When should retained primary labial incisors be extracted?

If they haven't naturally corrected by 8 years of age

17

True or false.. it is acceptable to remove some soft tissue covering the teeth to facilitate eruption when teething

False.

18

How soon do eruption hematomas form before eruption

A few weeks before eruption

19

What are eruption sequestrum?

Tiny spicule of non viable bone overlying the crown of an erupting permanent molar just enforce or immediately after the emergence of the tips of the cusps through the oral mucosa

these arent a concern but may be removed

20

True or false... most natal/neonatal teeth are not supernumerary teeth

True. They are actually the primary incisors

Natal teeth are often associated with syndromes like Pierre robin syndrome

21

What are the differences between Epstein pearls, bohn nodules, and dental lamina cysts?

Epstein pearls - formed along the midpalatine raphe. Remnants of epithelial tissue

Bohn nodules - formed along buccal and lingual aspects of dental ridges and on palate away from the raphe. Remnants of salivary gland tissue

Dental lamina cysts - found on the crests of maxillary and mandibular dental ridges. Remnants of dental lamina

22

True or false... ankylosis of the primary anterior teeth doesn't usually happen unless there has been trauma

True

23

Ankylosed teeth have a ___ sound opposed to a normal ___ sound upon percussion

Solid

Cushioned

24

True or false... hypothyroidism is associated with premature eruption of teeth

False. Delayed eruption

25

Tooth development can be seen as early as the ___ week of embryonic life

6th

26

Congenital absence of a tooth is a result of a lack of ___ or an arrest in the __ of cells

Initiation

Proliferation

27

True or false... if the primary tooth fails to form, the permanent tooth will also fail to form

True. Because the permanent buds stem from the primary buds

28

How are supernumerary teeth formed?

Result from continuing budding of the enamel organ

29

The peripheral cells of the cap form the ___ and ___

Inner and outer enamel epithelium

30

What happens if cells form the enamel epithelium become more fully differentiated or detached from the enamel organ?

They produce enamel and dentin which results in a odontoma or supernumerary tooth

Sometimes they assume a secretory function common to epithelial cells and a cyst develops

The degree of differentiation of the cells determines whether a cyst, odontoma, or supernumerary tooth