Openbites

Question 1

What is the causes of a posterior open bite?

Answer 1

• skeletal - increased vertical dimension
• tongue position - prevention eruption of teeth
• primary failure/arrested eruption of teeth

Question 2

What genetic factors cause an anterior open bite?

Answer 2

• high FMPA angle cases
• increased lower anterior face height
• backward growth rotation

Question 3

What environment factors cause an anterior open bite?

Answer 3

• habits
• abnormal tongue position
• trauma to condyle
• pathological (CLP, trauma)

Question 4

What is an anterior open bite?

Answer 4

When there is no contact or vertical overlap of lower incisors by upper incisors when mandible is in full occlusion

Question 5

What causes a relapse of an anterior open bite after treatment?

Answer 5

• unfavourable growth
• soft tissue factors
• resume digit habit
• inappropriate orthodontic movement