The most appropriate orthotic for this child is called supramalleolar orthotics.
The expression 'orthotics' makes reference to specific shoes customized for a patient condition.
In this case, supramalleolar orthotics makes reference to a given inherited condition with low incidence (rage genetic disease).
In conclusion, the orthotics situation here is supramalleolar orthotics.
Learn more about orthotics here:
https://brainly.com/question/7565359
#SPJ1