Questão jurídica principal
Whether the IV insurance had to cover the full cost of the requested ring orthosis under the exchange principle.
Decisão extraída
No full reimbursement was owed because the ring orthosis was not yet a scientifically established method; coverage remained limited to the cost of the standard orthosis.
Fundamentação extraída
The exchange principle does not eliminate the requirement that the replacement device be suitable and that there be a current statutory entitlement. Here, the ring orthosis was not broadly medically established, so full cost coverage was not justified.