Twinblock is a growth ortho appliance that fully corrects Skeletal Class II (convex profile due to underdeveloped lower jaw), best affect in period before peak of growth.

1. TWINBLOCK
GROWTH ORTHO
Dr. Nhi Nguyen

2. M, 9 YO
CASE #001
• Chief complaint: Protrusion
• Phase I: 9 months

3. CONVEX PROFILE, LOWER LIP
SUCKING

4. MIXED DENTITION
OJ 8MM, OB 5MM

5. DENTAL CLASS II, 4MM BOTH
SIDE

6. DOUBLE OCCLUSAL MODEL

7. SKELETAL CLASS II
CVM II

8. PHASE I
TWINBLOCK

9. APPOINTMENT 2, 2 MONTHS
TWINBLOCK CHECK-UP

10. APPOINTMENT 3, 3 MONTHS
TWINBLOCK CHECK-UP

11. APPOINTMENT 4, 4 MONTHS
TWINBLOCK CHECK-UP

12. APPOINTMENT 5, 5 MONTHS
TWINBLOCK CHECK-UP, OJ 4MM

13. APPOINTMENT 6, 6 MONTHS
TWINBLOCK CHECK-UP

14. APPOINTMENT 7, 8 MONTHS
OJ 3MM

15. APPOINTMENT 8, 9 MONTHS
STOP TWINBLOCK,
CHECK STABILITY, OJ 4MM

16. BEFORE END OF PHASE I

17. BEFORE END OF PHASE I

18. BEFORE END OF PHASE I

19. BEFORE END OF PHASE I
9 YO BOY, TWINBLOCK 9 MONTHS

20. PHASE II
(TO BE CONTINUED)