Cross bite

Question 1

WHen are anterior cross bites best to treat?

Answer 1

in the primary dentition privded there is enough overbite to retain

Question 2

If there are multiple teeth in buccal cross bite what is this likely to indicate?

Answer 2

that there is a skeletal discrepancy

the more teeth involved the likely the input of a skeletal problem

Question 3

If only one or two teeth are affected and opposing teeth need to be moved how can this be treated?

Answer 3

by using cross arch elastics between the affected teeth

Question 4

When are you most likely to see mandibular displacement with cross bites?

Answer 4

when there is a unilateral x bite

Question 5

What is a scissor bite?

Answer 5

the lower buccal cusps lie palatal to the palatal cusps of the upper teeth

Question 6

How do you treat posterior x bites unilateral affecting only one tooth?

Answer 6

alignment into the arch

x arch elastics if opposing teeth need to be moved

Question 7

When would rapid maxilliary expansion be used?

Answer 7

this expands the maxilla by opening the midline suture. it is more effective in the younger pateint

Question 8

By how much is the screw turned in rapid maxilliary expansion

Answer 8

0.2mm twice/day for 2weeks

Question 9

What must you ensure you do when using rapid maxillairy expansion?

Answer 9

over compenssate since soft tissues will cause the teeth to move back by 50%

Question 10

What is a quad helix appliance?

Answer 10

slow expansion appliance

it is W shaped and made from 1mm SS

Question 11

If there was an anterior cross bite, what would you use on a removable appliance to aid correction?

Answer 11

posterior bite plane

Question 12

What is a cross bite ?

Answer 12

Discrepancy between the buccolingual relationship of the upper and lower teeth