Dental Anomalies II

Question 1

How can eruption be disturbed?

Answer 1

Can be premature or delayed?

Question 2

When are more likely to see premature eruptions of teeth?

Answer 2

High birth weight

Hormonal abnormalities - excess GH/ thyroid

Question 3

Whats a neonatal tooth?

Answer 3

Teeth erupt in first 30 days due to superficial or ectopic position tooth germ

Question 4

Issue w/ neonatal teeth?

Answer 4

No root is formed - mobile - risk of inhalating and will interfere w/ feeding

Question 5

Management of neonatal teeth?

Answer 5

XLA due risks

Question 6

When is it common to see delayed eruption?

Answer 6

Low birth weight
Pre-term syndromes
Endocrinopathies impaction

Question 7

What are reasons for premature exfoliation?

Answer 7

Trauma or extraction
Immune - cyclic neutropenia
Cementum deficiencies

Question 8

What are reasons for delayed eruption?

Answer 8

Infraocclusion
Ectopic successors
Hypodonita

Question 9

What defects can see in structure of tooth?

Answer 9

All tissue - arrested development
Enamel defects
Dentine defects
Cementum defects

Question 10

Example of enamel defects?

Answer 10

Hypomineralisation
Hypoplasia
Discolouration

Question 11

What is hypomin?

Answer 11

Poor quality of enamel - porous leading to opacities

Question 12

What is hypoplasia?

Answer 12

Poor quantitiy of enamel = pits, grooves

Question 13

What are some systemic effects that can cause enamel defects?

Answer 13

Maternal and foetal conditions e.g rubella
Premature/ low birthwieght
F- - excessive dose
Severe/chronic child hood ilness

Question 14

What child hood illness could cause enamel defect?

Answer 14

Feveres
Measles
Chicken pox
Use of tetracylinices

Question 15

What systemic features can give localised enamel defects?

Answer 15

Infection/ trauma

Cleft lip/palate

Question 16

Example localised enamel defect?

Answer 16

MIH

Question 17

Why get opacities in hypo mineralisation?

Answer 17

Disruption to mineralisation at maturation stage causing porosity

Question 18

How does hypomin appear?

Answer 18

White/cream/yellow/brown opaque patch - have altered translucency due to altered texture

Question 19

Is hypomin localised or generalised?

Answer 19

Can be both

Question 20

How to differentiate between hypo min and fluoride induced opacities?

Answer 20

F- induced

• Brown
• See in primary and permannet teeth
• Dose dependent appearance
• Symmetrical distribution

Question 21

What defect is hypoplasia?

Answer 21

Quantitative - deficienct matrix production = less enamel

Question 22

How does hypoplasia appear?

Answer 22

Pits, grooves

Chronologically ‘matching’ teeth affected w/ systemic upset

Question 23

What can localised hypoplasia be referred to?

Answer 23

Turner tooth

Question 24

What is turner tooth?

Answer 24

Hypoplasia due trauma/ infection or primary tooth = damage underlying permanent tooth germ

Question 25

What teeth are commonly turner teeth?

Answer 25

4s/5s

Question 26

When can see change in colour of teeth?

Answer 26

Incorporating circulating substance - metabolic disorders (bilirubin)/ tetracycline Incoportation pulp products - loss vitality Exogenous agents - dietar/ bacterial

Question 27

What is AI?

Answer 27

Hereditary condition causing enamel defect

Question 28

What conditions are likely to have increased associated w/ AI?

Answer 28

AOB Hearing impairment Renal calcification Cone-rod dystrophy

Question 29

How does AI present?

Answer 29

Vairable - diverse phenotpyes | Can be hypomin or hypoplastic

Question 30

Classic appearance of AI?

Answer 30

Soft enamel wears away Bilateral and symmetrical - not always Snowcapped teeth

Question 31

Different classifications of AI?

Answer 31

Hypoplastic Hypomature Hypocalcified

Question 32

What dentition does AI affect?1

Answer 32

Both | Secondary more affected

Question 33

What is type of gene mutation seen in AI only seen females?

Answer 33

Lyonisation

Question 34

What is lyonisation?

Answer 34

Random inactivation one of X chromosomes

Question 35

What see in lyonisation AI?

Answer 35

Bands of normal and abnormal enamel - alternate ameloblast formation

Question 36

What are defects of dentine?

Answer 36

DI Radicular dentine dysplasia Fibrous dysplasia

Question 37

What can dentine defects be associated w/?

Answer 37

Osteogenesis imperfecta Elhers-danlos Rcikets Hypophosphatasia

Question 38

Most common dentine defect?

Answer 38

Dentinogenesis imperfecta

Question 39

What gene responsible for DI?

Answer 39

DSPP - defect in non-collagenous dentine matrix protein

Question 40

How does DI present?

Answer 40

Opalesent teeth w/ brown/ blue colour Bullbous crowns w/ short/thin roots Pulp chamber oblieration

Question 41

What dentition does DI affect?

Answer 41

Both - primary is more severe

Question 42

How is dentine abnormal DI?

Answer 42

Irregular and reduced tubules | Cellular inclusions from pulp = gradual obliteration

Question 43

What is type I DI associated w/

Answer 43

Osteogenesis imperfecta | Mutation collagen type I genes

Question 44

Clinical features of osteogenesis imperfecta?

Answer 44

Bone fragile/ deform Lax joins Blue scerla

Question 45

What is dentine dysplasia?

Answer 45

Root dentine affects = normal crowns morphology and dentine but short blunt roots

Question 46

What see in dentine dysplasia?

Answer 46

Mobile teeth