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

2. Class II div I with well aligned arches

3. Lip Trap

4. Skeletal II base ANB=7.2

7. No fixed appliance needed in this case.

8. 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

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

10. 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

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

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

13. 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

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

15. Molar correction should be complete in less than 6 months

16. 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.

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

19. 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

20. Charlotte Barnard case 3

24. 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

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

26. L.C. case 4

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

29. Remove the brackets on the centrals

30. Awaiting fixed appliances

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

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

33. Study case 5
L.A

35. 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

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

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