Unit 4 + 9 + 10

UNIT 9 PRIMARY DENTITION

Done

What age are the roots of the primary dentition completed

Age 3

What is the order between these:

Lateral incisior

Canine

First molar

Central incisor

Second molar

1. Central incisor

2. Lateral incisor

3. First molar

4. Canine

5. Second molar

Which teeth develop first: mandibular or maxillary

Mandibular

What age range is the process of exfoliation of primary teeth

7-12

where does root resorption start

Apical end

What direction does root resorption continue

Direction of the crown

When does root resorption occur

1-2 years after root formation is complete

After what is established does root resorption occur

Apical foramen establishment

What causes the crown to be lost

Lack of support as root resorbs

What does lack of support from root resorption cause

Crowns to be lost

How many primary teeth are there

20

Which teeth are deciduous: permanent or primary

Primary

What age is the first permanent molar appearing

Age 6

is the first permanent molar lost before any primary teeth are lost

Yes

What age is primary dentition completed

Age 2.5

Are the incisors more upright in permanent teeth than primary

No, other way around

Do the permanent teeth have more or less spacing between the teeth compred to the primary

Less

What replaces the primary molars

Premolars

Do primary or permanent teeth have more prominent cervical ridges

Primary teeth

Do primary or permanent teeth have narrower cervixes

Primary

Do primary or permanent teeth have more widely flared roots

Primary teeth

are primary or permanent teeth darker in colour

permanent

do primary or permanent teeth have narrower mesiodistal lengths

Permanent

Do primary or permanent anterior teeth have thicker and shorter roots

Permanent

Do primary or permanent posterior teeth have longer or narrower roots

Primary

Are the roots in primary posterior teeth wider than the crown widths

Yes

Are there any primary teeth wider buccolingually than their permanent teeth counterpart

No

Does the 2nd premolar replace the primary 2nd molar

No, 1st premolar replaces the primary 2nd molar

Are the premolars narrower mesiodistally than the primary molars they replace

No

Primary molars are wider mesiodistally than the permanent premolars

Are there any primary teeth wider mesiolingually than their permanent teeth counterpart

(Excluding how molars are replaced by premolars)

No

Are there any primary teeth wider mesiolingually than their permanent teeth counterpart

(Including how molars are replaced by premolars)

Yes

Primary molars are wider mesiodistally than the permanent premolars

Do primary or permanent teeth have less prominent cervical ridges of the anterior teeth

Permanent

Do primary or permanent posterior teeth have narrower cervixes mesiodistally

Primary

Do primary or permanent molars teeth have more protruding buccal and lingual surfaces

Permanent

Do primary or permanent teeth have thinner enamel and consistent depth

Primary

Do primary or permanent teeth have thicker dentine thickness between pulp chamber and enamel

Permanent

Do primary teeth have short pulp horns

No

Primary teeth have high pulp horns

Are the primary teeth pulp chambers Large

Yes

Where is the greatest dentine thickness

B - Over pulpal wall at occlusal fossa

Where is the enamel thinner and with more consistent depth

A

Are the pulp horns higher in the primary or permanent teeth

Primary

Are the pulp chambers larger in primary or permanent teeth

Primary

Which letter shows the cervical ridges are more pronounced in primary teeth

D

Which letter shows the roots are longer and narrower in primary teeth as compared to permenant teeth

G