Orthopedic or Functional appliances.
On a growing teen there is the capacity mostly during growth spurt to encourage the lower jaw forward in patients with typically their chin appearing set back. They can mostly ’bring out’ any potential for growth of the lower jaw particularly in the short term. Simply placing train track braces is usually insufficient as fixed braces (train tracks) are designed primarily to straighten teeth

 Growth on children allows one to expand the upper arch to correct crossbites,

Facemasks
to correct skeletal class III problems are mostly effective during pre-growth spurt.