Thanks for coming to Healthcaremagic.
I believe she has been given braces for either hip or spine problem. There is no information regarding which anticonvulsant medicine she is having?
There is no direct relation between braces and seizures, unless pain/discomfort/anaesthesia given for braces/adjustments may have lowered her threshold to have convulsion
With such frequent recent seizures, I would advise to get in touch with Pediatric Neurologist
and get her medicines for seizures adjusted.
I hope this was helpful to you.
Dr Tejas Shah