Simple class II corrector study cases Case 1 K.J.

Class II div I with well aligned arches

Lip Trap

Skeletal II base ANB=7.2

No fixed appliance needed in this case.

An advantage of the appliance is the good aesthetics An advantage of the appliance is the good aesthetics. Now further improved by the use of plastic buttons on 2/2

Why does it not cause a crossbite? Question Why does it not cause a crossbite?

Answer You will notice that this appliance causes much less disturbance to the buccal segments than the twin block. It has to be quite a big overjet to cause a crossbite. You also get less post treatment posture

Simple class II corrector study case 2 M.J.S

Can be used for any case with class II molars who is under 15 years old

You don’t need to use buttons You don’t need to use buttons. In fact it is an opportunity to use up old stock. Or you could try to use tubes and brackets placed in the correct position which I have done here the problem is bonding the lower tube. If you stick it too high it is difficult to place the elastics. Full time wear except for cleaning

For construction details go to the help sheet for the simple class II corrector. On burtonortho.co.uk

Molar correction should be complete in less than 6 months

At bond up note cement on 6s just to prevent bracket loss At bond up note cement on 6s just to prevent bracket loss. It would have been possible to use short class II elastics to maintain the buccal segments.

Question if the molars are class I but there is still an overjet what can you do

Answer It is caused by crowding in the lower or spacing in the upper. If you want you can make another splint for the upper with the bead on the mesio-palatal cusp

Charlotte Barnard case 3

If you are not ready for fixed appliances you what can you do Question If you are not ready for fixed appliances you what can you do

Answer Fit an expansion screw labial bow appliance. Turn the mid-line screw one turn for every 1mm of overjet reduction.

L.C. case 4

IF YOU SEE THIS OR IN 2 DIV ii CASES YOU NEED TO BOND UPPER 2-2

Remove the brackets on the centrals

Awaiting fixed appliances

Question Why must you have a minimal delay between impressions and fitting the appliance

Answer If loose deciduous teeth move the appliance will not fit. When the appliance is being worn loose deciduous teeth are not a problem

Study case 5 L.A

Why not make your own plastic buttons on upper 2/2 etch the teeth and put a separator on the surface. Then fill with flowable composite

Question If you use separators to make a button how can you make it easier to remove the rubber after curing the light cure?

Answer Cut the module first it still makes a nice button and is easier to remove.