Development Disturbance Of teeth

Question 1

Types of developmental disturbance

Answer 1

1. Size
2. Number and eruption
3. Shape/form
4. Defects of enamel and dentin

Question 2

Size related tooth developmental disturbance

Answer 2

1. Microdontia

2. Macrodontia

Question 3

Types of microdontia

Answer 3

1. True generalised microdontia
2. Relative generalised microdontia
3. Focal or localised microdontia

Question 4

4 characteristic of True generalised microdontia

Answer 4

1. All teeth are smaller than normal
2. Occurs in some cases of pituitary dwarfism
3. Exceedingly rare
4. Teeth are well form

Question 5

Relative generalised microdontia 2 characteristics

Answer 5

1. Normal or slightly smaller than normal teeth

2. Present in jaws that are somewhat larger than normal.

Question 6

Which teeth are affected most by focal/localised microdontia?

Answer 6

Affects most often maxillary lateral incisor and 3rd molar

Question 7

Common forms of localised microdontia?

Answer 7

Which affects maxillary lateral incisor

• peg lateral
• instead of parallel, diverging medial and distal surface
• sides converge or taper together in incisally
• forms cone-shaped crown
• root is frequently shorter than usual

Question 8

Types of macrodontia?

Answer 8

1. True generalised macrodontia
2. Relative generalised macrodontia
3. focal or localised macrodontia

Question 9

3 characteristics of true generalised macrodontia?

Answer 9

1. All teeth are larger than normal
2. Associated with pituitary gigantism
3. Exceedingly rare

Question 10

Characteristics of relative generalised macrodontia?

Answer 10

1. Normal or slightly larger than normal teeth in small jaws

• results in crowding of teeth
• insufficient arch space

Question 11

3 characteristics of focal/localised macrodontia?

Answer 11

1. Uncommon condition
2. Unknown etiology
3. Usually seen with mandibular 3rd molars

Question 12

Types of anomalies related to number and eruption?

Answer 12

1. Supernumerary
2. Anodontia
3. Impaction