This is a difficult question and really depends on specific measurements that can only be determined during a consultation with a board certified plastic surgeon. In general though, 250cc will increase you a full cup size. So, if you are a C and want to be a full D, you likely need about 350cc...
When I have encountered this situation in the past I have coordinated post op pain relief with the Pain Management Specialist and it worked out well. Another solution is to use either a pain pump or a long acting local anesthetic such as Exparel.
I usually stop Silvadene after a few days and try to dry out the wound as much as possible. Weekly visits to your plastic surgeon to keep an eye on things is also not a bad idea. It should be fine as long as your implant does not get exposed or infected. Be Well!!
