4D 2.5 Development from Primary to Adult

Question 1

which system referes to the primary dentition as number/alpahbet

Answer 1

alphabet = sigmondy

numbers fdi

Question 2

which tooth is being represented

Answer 2

upper right primary canine

Question 3

which tooth is being represented

Answer 3

lower left primary canine

Question 4

how are primary teeth different to the permanent teeth

Answer 4

roots are more divergent

smaller

bulbous crown

whiter

exfoliate

bigger pulp horns/chamber

Question 5

how is the primary maxillary central incisor different to its permanent counterpart

Answer 5

Bulbous

Wide (width > height)

Incisal asymmetry

No mamelons

Clear cingulum

Bulbous cervical margin

Labial root curve

Question 6

compare Primary maxillary lateral vs central incisor

Answer 6

Similar features, except

– Disto-incisal angle more rounded

– Crown narrower (width < height)

Question 7

comapre primary mandibular incisors to permanent

Answer 7

similar re;ationship as in permanent incisors

Question 8

describe the primary maxillary canines

Answer 8

Often symmetrical crown

If asymmetry: – The mesial > distal slope

Cervical bulge

Question 9

primary mandibular canines compared to maxillary canine

Answer 9

Smaller and slimmer

Mesial < distal slope

D root curvature

Root curves slightly labially

Question 10

maxillary 1st primary molar

Answer 10

3 divergent roots - mesio buccal, disto buccal and palatal

2 main cusps - mesio buccal and mesio palatal

key feature - mesio-buccal tubercle

Question 11

Maxillary 2nd primary molar

Answer 11

– 3 roots

– 4 cusps

– Often cusp of carabelli on mesio-palatal cusp

Roots thin and divergent

Bulge on mesio-buccal aspect

Question 12

Mandibular 1st primary molar

Answer 12

Crown longer mesio-distally

Narrow occlusal table

4 cusps: – 2 buccal (larger) – 2 lingual (small) – Mesio-buccal largest

Mesio-buccal molar tubercle (of zuckerkandl)

2 roots

Question 13

Mandibular 2nd primary molar

Answer 13

Similar to lower 6 – 5 cusps – 2 roots

Buccal cusps more even sized

Mesial root flattened

Question 14

at what age is the dentition at

Answer 14

Question 15

at what age is the dentition at

Answer 15

Question 16

at what age is the dentition at

Answer 16

Question 17

at what age is the dentition at

Answer 17

Question 18

at what age is the dentition at

Answer 18

Question 19

at what age is the dentition at

Answer 19

Question 20

at what age is the dentition at

Answer 20

Question 21

at what age is the dentition at

Answer 21

Question 22

at what age does the 3rd molar start erupting

Answer 22

Question 23

at what age are the 3rd molars fully erupted

Answer 23

Question 24

what occurs at the gum pads at birth

Answer 24

gum pads over a-d’s

usually +ve overjet

unerupted teeth

rapid growth in 1st year

Question 25

complete the eruption chart

Answer 25

Question 26

why do the D’s erupt before the C’s

Answer 26

stabilise the occlusion

Question 27

what is the name of the space between the primary dentition

Answer 27

Question 28

describe flush distal edges of E’s and Attrition

Answer 28

Question 29

at the age of 6 whta occurs in the dentition

Answer 29

eruption of permanent dentition commences

deciduous teeth start to shed

start of the mixed dentition

Question 30

complete the permanent dentition eruption chart

Answer 30

Question 31

eruption of the permanent dentition is symmertical.

if the dentition isnt symetrical, what could that indicate

Answer 31

assymetry of the dentition is a result of delayed eruption, which can indicate a problem

Question 32

Delayed eruption could be a result of the following

Answer 32

Down’s syndrome

Delayed deciduous resorption due to trauma

Dilaceration

Supernumeraries

abnormal path of eruption

early deciduous loss and bone formatin

crowding

congenital disease

impaction

Question 33

what is dilaceration

Answer 33

Dilaceration is a developmental disturbance in shape of teeth. It refers to an angulation, or a sharp bend or curve, in the root or crown of a formed tooth