Occlusion & Tongue Thrust

Question 1

What is occlusion?

Answer 1

Refers to the alignment of the teeth when the jaws are closed.

Question 2

What is malocclusion?

Answer 2

deviations in the shape and dimension of the mandible and maxilla

Question 3

What is a Class I occlusion?

Answer 3

arches are aligned normally, some individual teeth may be misaligned

Question 4

What is a Class II occlusion?

Answer 4

upper maxilla is protruded and lower mandible is receded (overbite, overjet)

Question 5

What is a Class III occlusion?

Answer 5

maxilla is receded and the mandible is protruded (underbite).

Question 6

What is Ankyloglossia

Answer 6

Ankyloglossia (tongue-tie)- frenum is attached to close to the tip of the tongue

Affect: Interdentals and alveolar sounds

Question 7

What is macroglossia?

Answer 7

Large tongue

Question 8

What is microglossia?

Answer 8

Small tongue

Question 9

What is tongue thrust?

Answer 9

Deviant swallow- tongue tip pushes against the front teeth (instead of placing the tongue tip behind the alveolar ridge and the body of the tongue pushes the fluid/food posteriorly). This leads to

Question 10

How does tongue thrust affect speech production?

Answer 10

the tongue pushes against the front teeth affecting the production of /s/, /z/, /sh/, /ch/, /3/, /d3/.

Question 11

What sound are affected by occlusion and malocclusion?

Answer 11

Interdental, labiodental, interdental.