Dentition - Occlusion and Bite

Question 1

What is dental occlusion?

Answer 1

• The relationship of the upper dental arch to the lower dental arch when teeth come together

Question 2

Describe Class I occlusion.

Answer 2

• Normal
• Also called Neutrocclusion
• First mandibular molar is one-half tooth anterior to the first maxillary molar

Question 3

Class II occlusion:

Answer 3

• Malocclusion
• First mandibular molar is posterior to normal position
• Mandible is retracted

Question 4

Class III occlusion:

Answer 4

• Malocclusion
• First mandibular molar is anterior to normal position
• Mandible is protruded

Question 5

Which type of occlusion is each of the images below?

Answer 5

Question 6

What is relative micronathia?

Answer 6

• A condition in which the mandible is small in relation to the maxilla

Question 7

3 details about micronathia:

Answer 7

• May be part of other genetic syndromes
• May interfere with infant feeding
• May cause abnormal alignment of teeth

Question 8

What is an open bite?

Answer 8

• Anterior teeth do not occlude (do not touch when you bite down) because of excessive eruption of posterior teeth (back teeth are too high/tall)

Question 9

What is a closed bite?

Answer 9

• Posterior teeth do not occlude because of excessive eruption of anterior teeth (back teeth don’t touch)