It is likely, but depends on the kind of surgery. Incisions that were made transaxillary (armpit) or inframamary (breast crease) should not cause any trouble. The most popular method, periareolar, puts you at greater risk for problems.
If the nerves around the areola were not cut or damaged during surgery, you may be able to nurse fully or partially. Nerves are vital to breastfeeding since they trigger the brain to release prolactin and oxytocin, two hormones that affect milk production. Your chances of breastfeeding also improve if your milk duct system is intact.
No evidence supports that silicone from silicone implants leak into breast milk. Silicone is very similar to a substance used to treat a baby's stomach gas.
You will not know the full extent of nerve damage, if any, until you try to nurse. If you were thinking of having a BA, but want to nurse, postponing surgery is recommended. Wait until after you have given birth and breastfed your last child. Another alternative would be to feed your baby formula. The final decision is up to you.