CROSSBITE
a. 1st seen at 7 – 8 years
b. ∴ 1st ortho visits @ 7 – 8 years
c. 1st dental visit @ 6 months
d. 𝑎𝑛𝑦 𝑚𝑎𝑙𝑜𝑐𝑐𝑙𝑢𝑠𝑖𝑜𝑛 — due to early lossof primary teeth
e. 𝑎𝑛𝑡𝑒𝑟𝑖𝑜𝑟 𝑐𝑟𝑜𝑠𝑠𝑏𝑖𝑡𝑒 — retained primary teeth

ANTERIOR CROSSBITE
DEVELOPING Rx – icecream stick pushes
DEVELOPED Rx – orthodontic

1) Catalans appliance
a. 6 weeks
b. Lower teeth
c. 45° angulation
d. If Catalans appliance used more than 6 weeks
e. Then — separation of occlusion in posterior

2) Z – Spring with posterior bite plane
a. For developed crossbite