Skeletal classification

Question 1

What is it?

Answer 1

classification of relative positions of maxilla + mandible
(in a normal relationship the maxilla is just anteriorly placed in relationship to the mandible)
Measurements of the amount of this separation defines the classification

Question 2

Skeletal I

Answer 2

The maxillary base is 2-3mm forward, in relation to the mandible base with the teeth in occlusion

Question 3

Skeletal II

Answer 3

the maxillary base is forward to the mandibular base, the lower part of the face is reduced in height

Question 4

Skeletal III

Answer 4

the mandibular base is forward relative to the maxillary base. the lower part of the face increased in height

Question 5

Why is this important?

Answer 5

If there is a discrepancy at this stage + the young person is at the correct stage of development i.e 8-14 years (still growing)
A functional appliance will be considered for skeletal class II holding the mandible forwards in an ideal class I position + allowing mandibular growth

Question 6

Functional appliances

Answer 6

specialist removable appliances made of acrylic + stainless steel components worn in both arches at the same time. the commonest being a twin block. They can only be used whilst pt still growing (up to 14) + should be worn all the time but removed for sport.
Should be removed for cleaning +in some cases may need to be removed for eating