Hello and welcome to the forum. Thanks for your question. Did you have an X ray of the finger to know that it is fractured? I assume you have sought medical care. Placement of the fracture matters for treatment. Sometimes it is as simple as taping to adjacent finger if it is a stable fracture. If unstable, they will sometimes still secure but immobilize with a splint. Treating hypoplasia which is underdevelopment from birth often involves reconstruction. Have you had an orthopedic doctor advise you at all on these things?