Changes from thumbsucking
This patient was 8 years 6 months old and was a chronic thumbsucker. This resulted in lack of vertical overlap of the front teeth and some mild crowding of the lower front teeth. With vigorous thumbsucking normally we would also see narrowing of the upper back teeth possibly resulting in a crossbite. The thumbsucking in this case is relatively passive as no posterior crossbites are evident. A TSDA (thumbsucking deterrent appliance) was used for 6 month to act as a reminder to stop thumbsucking.