Lecture 4- Development Of Occlusion

Question 1

What are the 4 stages of development of dentition

Answer 1

Gum pads
Primary dentition
Mixed dentition
Permanent dentition

Question 2

These are the alveolar arches at time of birth

Answer 2

Gum pads

Question 3

Retrognathic mandible in gum pads are corrected by

Answer 3

Differential and forward growth of mandible

Question 4

Anterior open bite in gum pad are corrected by

Answer 4

Eruption of primary incisors

Question 5

Infantile swallow in gum pads are corrected by

Answer 5

Weaning from liquid to solid food

Question 6

When does eruption of primary teeth begins?

Answer 6

6 months

Question 7

When does all primary teeth must erupt?

Answer 7

3 years old

Question 8

Give the characteristics of primary dentition

Answer 8

Spaced anteriors
Primate spaces
Shallow overbite and overjet
Straight terminal plane
Almost vertical inclination of anterior teeth
Ovoid arch form

Question 9

Location of primate spaces

Answer 9

Mesial to maxillary primary canine
Distal to mandibular primary canine

Question 10

What is the ideal occlusion in primary dentition?

Answer 10

Flush

Question 11

How does deep bite in primary dentition can be corrected?

Answer 11

Eruption of primary molars
Attrition of incisal edges
Forward and downward growth of mandible

Question 12

How does flush terminal plane corrected in primary dentition?

Answer 12

Early mesial shift

Question 13

How does primary spacing in primary dentition corrected?

Answer 13

Eruption of permanent teeth

Question 14

It is to compensate the large mesiodistal width of primary C,D,E

Answer 14

Nance Leeway Space

Question 15

Nance Leeway Space - maxillary

Answer 15

0.9mm per quadrant; 1.8mm total

Question 16

Nance Leeway Space- mandibular

Answer 16

1.7mm per quadrant; 3.4mm total

Question 17

How does mandibular anterior crowding in mixed dentition corrected?

Answer 17

Secondary spacing
Intercanine width increase
Tongue pressure

Question 18

How does ugly duckling stage in mixed dentition corrected?

Answer 18

Maxillary canine eruption

Question 19

How does end on relation of 1st permanent molar corrected?

Answer 19

Late mesial shift

Question 20

How does overjet and overbite corrected in permanent dentition?

Answer 20

Eruption of all permanent teeth
Differential growth of mandible